BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Unveiling the Origins of a Historic Supernova
DTSTART;VALUE=DATE-TIME:20261028T182000Z
DTEND;VALUE=DATE-TIME:20261028T182100Z
DTSTAMP;VALUE=DATE-TIME:20261029T083305Z
UID:indico-contribution-3691@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Amilia Petryk (University of Manitoba)\nThe nature o
 f historical supernovae is often unknown\, but supernova remnants and thei
 r environments can serve as powerful tools for probing the progenitor syst
 em. 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 cav
 ity explosion\, leading to questions about the nature of the progenitor sy
 stem. To better characterize this supernova remnant\, long-slit spectrosco
 pic data of RCW 86’s expanding shock front were gathered in 2025 using t
 he 8.1-meter Gemini South telescope. The data were reduced via the Gemini 
 DRAGONS pipeline\, with the goal of measuring the ionized hydrogen and hel
 ium fluxes and converting them into surface brightnesses. CLOUDY (1D photo
 ionization simulation software) models were run for two different models: 
 a blackbody model and a stripped-envelope model. The blackbody model repre
 sents thermonuclear runaway supernovae\, as a white dwarf accretes matter 
 from a companion star\, whereas the stripped-envelope star model represent
 s core-collapse supernovae. The surface brightnesses of these models were 
 compared with the observed surface brightnesses\, and the models were cons
 trained accordingly. The temperature and luminosity of the blackbody sourc
 es were constrained to models with high temperatures and low luminosities.
  The mass and luminosity of the stripped-envelope star model was constrain
 ed to ~4 M$\\odot$ and ~2.5 L$\\odot$\, respectively. With this work we ha
 ve placed novel constraints on the progenitor of RCW 86.\n\nhttps://nyx.ph
 ysics.mcgill.ca/event/587/contributions/3691/
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3691/
END:VEVENT
END:VCALENDAR