Small planets show a radius valley near 1.8 R⊕ splitting them into rocky super-Earths and volatile sub-Neptunes, but whether rocky planets can be born rocky, or are all stripped cores of planets that lost an envelope, is still unsettled. We test two planet formation scenarios, Sub-Neptune (no planet born rocky) and Sub-Neptune+Super-Earth (some are), as priors to analyze this question. We...
Aims. Massive black holes in the early Universe had limited time to assemble. We identify which JWST black-hole candidates place the strongest constraints on early growth models and assess how these constraints depend on mass estimates and growth assumptions. Methods. We compile 350 published measurements at $z\geq4$ and analyse a primary sample of 220 objects with broad Balmer-line...
The spatially-resolved kinematics of line emission from the circumgalactic medium (CGM) of a galaxy can contain information about the CGM turbulence, which may play an important role in galaxy evolution. Due to the region's diffuse nature, there have been limited observations of low-redshift CGM emission until recent efforts that use spatially-resolved emission line kinematics to probe CGM...
Long-duration gamma-ray bursts (GRBs) are the most luminous explosions in the Universe, visible out to cosmological redshifts. Almost every spectroscopically confirmed supernova (SN) associated with a long GRB has been hydrogen and helium poor with broad lines (Ic-bl), indicating a stripped massive star progenitor with fast winds that produced a highly-collimated jet viewed on-axis. A critical...
Homogeneously analysing the chemical signatures of the Milky Way’s most pristine metal-poor stars is essential to reconstruct its early assembly and first-star nucleosynthetic yields. Over the next few years, WEAVE in the North and 4MOST in the South will enable high-resolution, multi-object spectroscopic follow-up of millions of Gaia stars. We present a machine learning pipeline for the...
The first generation of stars, Population III (Pop III), likely played a fundamental role in the formation and evolution of early galaxies. Recent JWST observations have opened a new window for systematically identifying Pop III signatures at high redshift (z ≈ 3–6), during the universe’s first few billion years, including strong hydrogen emission and weak or absent metal lines such as [O...
Recent JWST observations of distant luminous galaxies and compact "little red dots" suggest the existence of early supermassive black holes (SMBHs) with masses $> 10^5\,M_\odot$. Their rapid emergence challenges conventional seeding and growth scenarios, motivating the question: could these SMBHs be seeded by primordial black holes (PBHs) formed from inflationary perturbations?
Explaining...
Using a novel crossmatch of GALAH DR4 stellar abundances with K2 and TESS planet detections, we apply the gradient boosted decision tree ensemble model XGBoost to investigate relative importances of specific chemical abundances and molar ratios in predicting small planet hosts. In contrast to previous studies, we find a consistently high feature importance for oxygen across models. Using a...
Fast Radio Bursts (FRBs) are highly energetic, ~millisecond duration bursts of radio emission with extragalactic origins that were discovered nearly 19 years ago. While there is some evidence suggesting FRBs may originate from magnetars, there still remains the question of whether all FRBs are produced by magnetars. One potential method for further understanding FRB progenitors is through...
Ultraviolet observations provide a direct view of young stellar populations associated with recent star formation in galaxies, complementing longer-wavelength observations that trace older stellar populations. The Canadian-led Cosmological Advanced Survey Telescope for Optical and ultraviolet Research (CASTOR) will provide wide-field coverage with deep imaging fields, enabling large samples of...
I aim to determine the inclination of the rotation axis of stars that host exoplanets and to use that information to find the true mass of their exoplanets. To detect exoplanets via the radial velocity method, one measures the minute redshifts and blueshifts in a star’s spectrum as a star’s planet causes orbital reflex motion towards and away from the observer. The strength of the radial...
Most of the baryonic mass in galaxy halos consists of diffuse, magnetized plasma, which is referred to as the circumgalactic medium (CGM). The properties of the CGM remain relatively unconstrained, as the low density of the gas makes it hard to image in most wavelengths of the electromagnetic spectrum. Fast radio bursts (FRBs) are thus incredibly good probes of this plasma, because they...
JWST's discovery of extremely massive, quiescent galaxies in the early Universe has introduced significant tension with current galaxy formation models, implying that galaxies formed and quenched faster and earlier than expected. However, estimates of distant galaxy masses are highly uncertain. They assume a stellar initial mass function (IMF) similar to that in the Milky Way, despite...
The Event Horizon Telescope (EHT) Collaboration produced the first image of the apparent shadow of the central black hole of Sagittarius A$^*$ (Sgr A$^*$). Sgr A$^*$ source structure varies significantly on timescales shorter than the duration of an observation, preventing improved data coverage through Earth rotation aperture synthesis. This rapid variability provides the opportunity to...
Carbon-enhanced metal-poor (CEMP) stars are some of the oldest and most chemically primitive stars in the Milky Way. They are defined by excess carbon and low metallicity, and further classified by neutron-capture enrichment. The origin of this unique enrichment varies between CEMP subclasses. Neutron-capture-enriched CEMP stars reflect previous extrinsic enrichment events, whereas CEMP stars...
GW231123 is an exceptional binary black hole merger whose unusually large component masses challenge standard expectations for stellar origins. Additionally, its secondary mass (the less massive one) is in tension with the observed gravitational-wave population. Strong gravitational lensing provides a potential explanation, as magnification biases the inferred source parameters, making a...
Fast radio bursts (FRBs) are short-duration (ms), bright (Jy-kJy) bursts of radio emission, generally originating from cosmological distances. Although thousands of FRB events have been published, the progenitor and emission mechanism of FRBs are still not well understood. While most FRBs appear to be one-off events, ~2% of FRBs have been observed to repeat. The Canadian Hydrogen Intensity...
Ultra-cool dwarfs are the smallest and coolest stars on the main sequence. While M dwarfs are generally known to harbour a large number of planets, including rocky, Earth-mass exoplanets, the occurrence rate and architectures of planetary systems around ultra-cool dwarfs remain poorly constrained. To date, the only well-characterized planetary system around an ultra-cool dwarf is the...
Despite the traditional model of a Yellow Supergiant as a brief transitional phase in a star’s life before the onset of core helium burning, there is an increasing catalog of supernovae explosions that have had their progenitors identified as Yellow Supergiants from pre-explosion imaging. Notably, these supernovae are both partially-stripped and hydrogen-poor. The widespread interpretation for...
Galactic bars exist in over half of the galaxies in our local universe, but studies of the resolved gas properties in the bar have been limited to small samples of star forming spiral galaxies. The ALMA program Kiloparsec Investigations of Local Objects’ Gas And Star-formation (KILOGAS) is a survey of the molecular gas in 450 mass-selected galaxies covering the full parameter space of star...
Imaging Fourier-transform spectrographs (IFTS) such as SITELLE record spectral information by scanning a Michelson interferometer mirror and are reduced with the ORBS pipeline, which assumes conventional camera-style, frame-based exposures. We are developing a laboratory prototype IFTS built around Microwave Kinetic Inductance Detectors (MKIDs): energy-resolving, photon-counting sensors that...
Measurements of massive star formation from Galactic and extragalactic cloud-scale observations produce conflicting results. Theory predicts that gas surface density, velocity dispersion, virial parameter, and gravitational freefall time should play a key role in setting the timescale for star formation. Milky Way observations support this prediction. In extragalactic systems, observations...
The spatial distribution of starspots on red dwarf stars remains an open question in stellar astrophysics. Understanding whether red dwarfs’ starspots are preferentially equatorial—akin to the Sun—or are preferentially polar can give us insight into how these generate their magnetic dynamos and help to better characterize the atmospheres of the planets that orbit them as atmospheric...
Galaxies do not grow in isolation. Interactions with neighboring galaxies and material in their surrounding cosmic environments can drive stellar mass assembly and morphological evolution. Galaxy stellar haloes retain signatures of these externally driven processes due to the long dynamical timescales in galaxy outskirts. Observations tracing stellar halo buildup therefore provide a probe of...
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) has been an instrumental telescope in shaping our understand of transient sky by detecting the vast majority of known fast radio bursts (FRBs) using its CHIME/FRB backend. The recently launched CHIME All-Sky Multiday Pulsar Stacking Search (CHAMPSS) uses data from this backend to perform a pulsar periodicity search with unprecedented...
Star formation rates (SFR) and gas-phase metallicities in galaxies are usually measured from strong nebular emission lines under the assumption that young massive stars are the only source ionizing the gas. In galaxies hosting an active galactic nucleus (AGN), or containing old stellar populations, harder radiation also produces these lines, so the standard approach is to classify each region...
Stellar ages are a foundational component of astronomy research, but are notoriously difficult to measure for low mass main sequence stars. Fortunately, variability indicators such as rotation period, flaring rate, and amplitude of flux variability can provide some age constraints, but they evolve in nonlinear and non-monotonic ways. Furthermore, these indicators are typically characterized as...
Fast radio bursts (FRBs) are micro-to-millisecond-duration radio transients originating from extragalactic distances. While thousands of FRBs have been detected, their origins remain unknown. Many FRB theories invoke highly magnetised neutron stars, called magnetars, as FRB progenitors. In this talk, I will evaluate the magnetar progenitor scenario using recent results from the CHIME/FRB...
Spectral indices are an effective technique for differentiating between thermal and non-thermal sources of radio emission. Most often, spectral indices are determined using flux measurements taken from multiple observations with different instruments. Since this data is not always available, finding indices from a single telescope observation is desirable. The reliability of these in-band...
Understanding the mechanisms that drive and halt star formation requires an assessment of both the stellar and gaseous components of a large statistical sampling of galaxies. For Canadian astronomers, large optical surveys have adequately serviced the stellar components, but large samples of resolved molecular gas observations are challenging to acquire. However after 13+ years of operations,...
Stripped-envelope core-collapse supernovae are the violent explosions that mark the death of a massive star that had some or all of its outer H and He layers stripped off. One class of stripped-envelope supernovae is the rare Type Ic-BL; these are the only events associated with the detection of a long-duration gamma-ray bursts, but it is still unclear why only some Ic-BLs accompany a...
The Cosmological Advanced Survey Telescope for Optical and UV Research (CASTOR) is a proposed 1 meter space telescope under development by the National Research Council of Canada, the Canadian Space Agency, and partner institutions around the world. It will serve as a successor to the Hubble Space Telescope (HST) at short wavelengths, providing continued access to the ultra-violet (UV) and...
Convective boundary mixing occurs at the boundaries between convection and radiation zones in stars, where the material in the convection zone crosses the convective boundary. This can change the location of the convective boundary and bring more hydrogen into the core of the star, which has many effects on its evolution, including an extended main sequence lifetime. We use 1D stellar...
Using high-resolution ALMA millimeter observations, we investigate the formation of massive star clusters within the nuclear ring in NGC 3351, a nearby Milky Way analog galaxy. The dense, high-pressure conditions within nuclear rings are among the most extreme star-forming settings in the local universe, providing the ideal conditions for massive cluster formation. Nevertheless, the mechanisms...
Massive stars strongly reshape their surroundings through radiation, stellar winds, and eventually supernova explosions, but when these different feedback mechanisms begin to dominate remains uncertain. We present VLA 3 GHz radio continuum observations of 13 nearby PHANGS galaxies to trace the evolution of star-forming regions during their first ~10 Myr. Combining these data with HST, JWST,...
With the advent of JWST imaging in the Local Group, young stellar objects (YSOs) are being observed in a broader range of environments than ever before, which will revolutionize our understanding of star formation if their properties can be modelled accurately. We present a new approach to characterizing YSO populations by applying the technique of population synthesis originally developed for...
Trans-Neptunian Objects (TNOs) are small, distant bodies beyond Neptune that provide important context on the formation and evolution of the outer Solar System. However, the faintest TNOs are difficult to detect because their weak signals can be easily confused with noise and subtraction artifacts. Manual identification of genuine TNOs is therefore a time-consuming process that can require...
The spatial extent of the environment's impact on galaxies marks a transitional region between cluster and field galaxies. We present a data‐driven method to identify this region in galaxy clusters with masses $M_{200\rm ,mean}>10^{13} {\rm M}_{\odot}$ at $z = 0$. Using resolved galaxy samples from the largest simulation volume of IllustrisTNG (TNG300-1), we examine how galaxy properties vary...
Polarization observations provide a unique opportunity to probe the geometry and structure of astrophysical magnetic fields. In the Milky Way, Supernova remnants (SNRs) are a key environment for connecting polarized emission to the physical processes tied to shaping the magnetic field: shocks, turbulence, and instabilities. By studying the organization of the on-sky polarization angle (PA) in...
The recent analyses of DESI DR2 BAO, Planck CMB and various Supernovae datasets have shown preferences for dynamic dark energy (DDE) over cosmological constant at various levels of significance, under frequentist model comparison tests. However, the same analysis done with a pure Bayesian model comparison test can lead to the opposite conclusions. In contrast to these traditional model...
The spatial distribution of dark matter can help us understand the formation and evolution of the structures in our universe. However, dark matter is invisible, so we need to infer its distribution from the motions of visible stars. Previous techniques struggle to handle incomplete and biased datasets, such as missing velocity information, and have difficulty incorporating measurement...
Relativistic jets launched from accreting compact objects are thought to play an important role in the Universe, influencing large-scale processes such as galaxy evolution and star formation. However, the connection between their properties and those of the accretion flow remains poorly understood. Multi-wavelength time-domain observations of black hole X-ray binaries provide a new avenue to...
Neutral atomic hydrogen is the primary raw material from which stars form in galaxies; and understanding its spatial distribution, kinematics, and thermal state across cosmic time is therefore fundamental to our comprehension of how galaxies assemble and evolve. The 21-cm hyperfine transition of neutral hydrogen is a powerful probe of cold gas in and around galaxies across cosmic time. When a...
Recent cosmological tensions have renewed interest in the role of reionization in cosmological parameter inference. In particular, “flash reionization” has been proposed as a transient episode of ionization at high redshift that could increase the Thomson optical depth, $\tau$, while remaining compatible with CMB polarization measurements.
In this work, we present the first Markov Chain Monte...
Understanding how supermassive black holes influence the galaxies they inhabit remains a central challenge in astrophysics. The most massive galaxies in the Universe—Brightest Cluster Galaxies at the centers of galaxy clusters—offer an exceptional laboratory to study this connection. Immersed in vast reservoirs of hot gas, their central black holes both accrete surrounding material and release...
Protostellar accretion streamers are coherent filamentary structures that channel material from envelope scales and beyond into protostellar cores. Largely found serendipitously, streamers have emerged as a potentially important yet poorly characterized mode of mass assembly in early star formation, with occurrence rates, class dependence, and environmental dependence still unconstrained....
Exceeding temperatures of up to 3,300K, WASP—189b's dayside hemisphere is a unique laboratory in which we can probe the extreme atmospheric conditions experienced by the population of ultra-hot Jupiter (UHJ) exoplanets. Using high-resolution observations from GHOST on Gemini South, we detect various metals within WASP—189b's atmosphere, alongside a first tentative detection of neutral...
Fast radio bursts (FRBs) are energetic millisecond-duration bursts with extragalactic origins. Roughly 4000 unique sources have been observed to date, about 3% of which have been seen to repeat, though it remains unclear whether all FRBs repeat.
An FRB population study addresses several key questions: How often do FRBs occur in the universe? What energy and redshift distributions do they...
Fast radio bursts (FRBs) are millisecond-duration radio transients originating at extra-galactic distances. Their morphologies, the signal’s evolution as a function of time and frequency, encode valuable information about their emission physics as well as intervening plasma and magnetic fields. For example, we aim to measure the temporal spacing between sub-bursts, their changes in bandwidth...
The physical and chemical conditions present during planet formation are established during the earliest embedded Class 0/I phases of star formation. At this stage, protostellar systems are still being shaped by infall, outflows, irradiation, and chemical processing. Understanding how these processes set the initial conditions for star and planet formation requires observations that can...
Intermediate-mass black holes (IMBHs), with masses between $10^2$ and $10^5$$M_\odot$, may represent a missing link between stellar and supermassive black holes, yet few compelling candidates are known. In the Milky Way globular cluster Omega Centauri ($\omega$ Cen), Häberle et al. (2024) recently identified several stars near the cluster centre with projected velocities exceeding the escape...
Stars are rarely born alone, often existing in pairs. When one of these stars reaches the end of its life, it can collapse into a black hole, creating a black hole X-ray binary where it feeds off the matter of its companion star. This material spins rapidly, creating a hot accretion disk (emitting X-rays) while also launching powerful, outflowing jets (emitting radio waves). To understand how...
The distribution of stellar masses within a globular cluster (GC) at the time of formation, referred to as the Initial Mass Function (IMF), is directly linked to the evolution of the cluster, including the rate of binary black hole (BH) mergers that produce gravitational waves. Recent studies suggest that GCs may have formed with a bottom-light IMF, meaning fewer low mass stars and more BH...
We report the first detection of brightness variability in an extremely metal-poor brown dwarf. These objects are ancient, very low-mass members of the Milky Way that formed when the Galaxy contained far fewer heavy elements than it does today. Using the 10.4-m Gran Telescopio Canarias, we found that the nearest known extreme T subdwarf, WISEA,J181006.1$-$101000.5, changes its $J$-band...
Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients, a subset of which repeat. Multipath propagation through ionized media convolves each burst with a one-sided exponential, producing a scattering tail whose timescale scales steeply with frequency, τ ∝ ν^α with α ≈ −4. An observed burst width, however, also carries contributions from intrinsic emission,...
Dark matter may be made of ultra-light bosonic particles, so light that it behaves like a large-scale quantum wave rather than a swarm of individual particles ("ultralight" or "fuzzy" dark matter). This wave nature changes how massive objects like black holes move through it: the drag that normally causes objects to sink toward a galaxy's center can behave very differently.
Prior work on a...
Models of the Galactic electron density are widely used to predict distances and scattering of compact radio sources, and to account for interstellar medium foregrounds in extragalactic studies. The recently updated NE2025 model (Ocker & Cordes 2026) offers improvements over its predecessor, the commonly referenced NE2001. However, its scattering predictions have yet to be tested by...
How do supermassive black holes (SMBHs) regulate the growth of the most massive galaxies? The cycle of gas cooling and AGN feedback is central to this question, yet the physical state of the "warm" multiphase gas often remains elusive. In this talk, I present JWST/NIRSpec IFU observations of the inner 640 pc of NGC 4696, the prototypical BCG of the Centaurus cluster. These data reveal dozens...
Of the 2423 unassociated sources in the fourth data release of the fourth Fermi Large Area Telescope catalog (4FGL-DR4), 748 had also been observed by the Neil Gehrels Swift Observatory's X-ray telescope for $>4$~ks. Neumann et al. (2026) recently used a neural network classifier to identify new local pulsars and high-energy blazars from these unassociated sources, and they classified 173...
Type IIn supernovae (SNe) are a subclass of Type II SNe characterized by narrow hydrogen emission lines produced by interactions between SN ejecta and surrounding circumstellar material (CSM). Some Type IIn SNe show these features only briefly, indicating less extended CSM and motivating their classification as Type IIn-like SNe. The origin of this CSM remains a major outstanding...
AGN (active galactic nuclei) feedback plays a crucial role in shaping galaxy evolution. Numerical simulations show that the kinetic energy transfer efficiency from radio jets to interstellar medium (ISM) is relatively high, suggesting a significant role of radio jets in the feedback. We investigate AGN feedback on cold gas in the compact steep-spectrum (CSS) radio source 3C 303.1. CSS sources...
Common envelope (CE) evolution occurs when one, often more massive, star in a binary system completely engulfs a nearby companion. The companion continues its inspiral inside the shared envelope, leading to one of two outcomes: the companion merges with the primary star, or its liberated orbital energy unbinds and ejects the envelope. In the latter case, the ejection of the envelope leaves...
This research presents the first mid-infrared characterization of the Galactic Center (GC) Wolf-Rayet (WR) and Ofpe/WN9 star population using integral-field spectroscopy from the JWST Mid-Infrared Instrument MRS. Data consist of calibrated, three-dimensional FITS spectral cubes spanning λ∈[4.9, 27.9] μm at resolving power R∈[1330, 3750]. As an initial application, the spectrum of the Ofpe/WN9...
The Vera C. Rubin observatory is the premier optical transient facility on sky today. Many transient sources are point sources embedded in a host galaxy. This necessitates the subtraction of that host's light before examining the brightness over time, light curve, of the transient. Standard practice is to stack images from before the transient to then subtract and reveal the changing light...
We investigate the redshift 1.98 galaxy cluster XLSSC 122 using the Hubble Space Telescope (HST) from the core of the cluster out to 3 Mpc, a scale equivalent to 10 times the R500 = 295 kpc radius. We present an expanded photometric and spectroscopic catalogue of the cluster, bringing the total number of spectroscopically classified member galaxies to 74, with 35 new member galaxies added in...
Accretion disks around black holes, such as those in active galactic nuclei and X-ray binaries, are home to extreme plasma processes that produce bright emission across the electromagnetic spectrum. One such process powering this emission is thought to be magnetic reconnection, the violent restructuring of the magnetic field topology in which magnetic field lines pinch apart and reconnect,...
The nature of historical supernovae is often unknown, but supernova remnants and their environments can serve as powerful tools for probing the progenitor system. RCW 86 is a peculiar supernova remnant, thought to be associated with the historical supernova SN 185. A prevailing theory is that it was a cavity explosion, leading to questions about the nature of the progenitor system. To better...
Bulges are implicated in quenching, but which bulges, and how they quench galaxies (gas-driven or efficiency-driven), remain open questions. We present SPADE (Spectro-Photometric Analytic Decomposition Engine), a new method that fits imaging, integral-field stellar kinematics and stellar-population spectra of a galaxy simultaneously under one likelihood to separate a bulge from a disk, and...
Super-resolution microscopy is a rapidly evolving field, and analytical tools are struggling to keep up with novel imaging techniques. 'MINFLUX' (minimal fluorescence photon fluxes) is one such technique; it uses targeted emission to track molecules down to the nanometer scale. However, 'MINFLUX' outputs localizations of these molecules rather than viewing the protein superstructure directly,...
Active galactic nuclei (AGN) are supermassive black holes in the centers of massive galaxies with large inflows of gas and dust collisionally heating up and radiating away energy. Quasars are a type of AGN that outshine their host galaxies by several magnitudes, capable of releasing high velocity outflows (or winds) of material due to the intense radiation being emitted. When these outflows...
Young stellar associations provide an opportunity to investigate the recent star formation history of the Solar Neighborhood by identifying groups of stars that share similar ages and kinematic properties. In this work, I investigate two nearby young stellar associations, SCYA 75 (Ophiuchus Southeast) and SCYA 103 (Scorpius-Centaurus), to explore whether their stellar populations show evidence...
Active Galactic Nuclei (AGNs) are dense, bright regions at the centre of galaxies thought to be caused by matter accreting into a supermassive black hole. Millions of AGNs have been observed, and population-level studies are needed to learn about AGN physics.
On the other hand, AGNs can be contaminants in cosmology. Type 1a supernovae are frequently used as “standard candles” to infer...
To date, ALMA has conducted thousands of protostellar disk observations, and studying this archive has revealed much about the nature of these dusty disks around infant stars. Including that many of even the youngest disks contain an indicator of planet formation: axisymmetric substructures. However, the high computational/observational requirements of current methods mean only a small portion...
Global 21-cm experiments are designed to capture the sky-averaged 21-cm signal emitted by neutral hydrogen and use it to probe the conditions present during the earliest epochs of the universe. Other experiments, such as EDGES and SARAS 3, probe the signal produced during the era of cosmic dawn; however, their reported results are in tension with each other. One proposed explanation for the...
Young Stellar Objects (YSOs) range from the beginning of star formation (protostars) up until the beginning of the main sequence (T Tauri stars). By looking at the inception of the formation process, we can gain insight into stellar evolution, star-forming regions and their structures, and the motion of stars and surrounding matter. Using the Orion star-forming complex as a primary testing...
Stellar proper motions (PMs) are fundamental for reconstructing the Local Group dynamics, understanding the Milky Way accretion history, and constraining the nature of dark matter. While Gaia is powerful for measuring PMs, its performance is limited for faint sources (G > 20 mag). Previous studies on Gaia + Hubble Space Telescope (HST) astrometry have shown that combining telescopes achieved...
The formation of first-generation stars and galaxies marks the onset of Cosmic Dawn. The Epoch of Reionization ensues when these structures emit ultraviolet light that ionizes neutral hydrogen in the universe. Although these epochs are some of the least understood, the 21 cm signal, which is emitted from the spin flip transition of neutral hydrogen's ground state, is a promising probe for...
The nature of dark matter is among the most longstanding mysteries in physics and astronomy, with its detection potentially enabling a deeper understanding of physics beyond the standard model. One of the most promising candidates for dark matter is the weakly interacting massive particle (WIMP), which has become the subject of various dark matter searches across the world. The Super Cryogenic...
The nature of cosmic acceleration remains an open question, with Modified Gravity (MG) providing an alternative to dark energy models within General Relativity. Cosmic voids are particularly sensitive tracers of MG and their two-point clustering captures higher order density field statistics. Since conventional two-point statistics are primarily dominated by overdensities, we use the marked...
Inflation is a proposed period of accelerated expansion in the early universe, providing a mechanism for generating the primordial fluctuations that seeded cosmic structure. Many inflationary models are able to match the large-scale observations of the CMB and LSS, whilst differing in their dynamics and small-scale characteristics. Nonlinear effects could provide additional information about...
Dennis Crabtree
Christopher Matzner
Helen Kirk
Allison Man
Anna O'Grady
John Ruan
