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SUMMARY:Measuring Simulated Circumgalactic Medium Turbulence with Emission
 -Weighted Projected Velocity Structure Functions in FOGGIE
DTSTART;VALUE=DATE-TIME:20261028T164500Z
DTEND;VALUE=DATE-TIME:20261028T165500Z
DTSTAMP;VALUE=DATE-TIME:20261024T120159Z
UID:indico-contribution-3652@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Helena Bouchereau ()\nThe spatially-resolved kinemat
 ics 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 effor
 ts that use spatially-resolved emission line kinematics to probe CGM turbu
 lence. We use velocity structure functions (VSFs) as a measure for the pro
 perties of turbulence using the high-resolution cosmological zoom-in FOGGI
 E simulations. We focus on the location of the "turnover" in the VSF slope
 \, often used as a measurement of the turbulence driving scale\, and study
  how resolution\, measurement area size\, projection effects\, and gas tem
 perature influence the inferred CGM turbulence driving scale. We find that
  projection significantly lowers the VSF normalization but we do not find 
 significant differences in the slope between 3D VSFs and emission-weighted
  projected 2D VSFs. We find that the size of the area used to measure the 
 VSF\, which can be thought of as the size of the emission nebula for a giv
 en instrument sensitivity\, correlates directly with the turnover location
  in the VSF. These dependencies should be considered when using VSFs to in
 terpret CGM turbulence from emission data\, as projection\, resolution and
  sensitivity constraints\, and the temperature of the gas probed will all 
 have a measurable effect on the VSF structure and the corresponding inferr
 ed turbulent properties.\n\nhttps://nyx.physics.mcgill.ca/event/587/contri
 butions/3652/
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3652/
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