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UID:69df1e76a5d21
DTSTAMP:20260415T011326
DTSTART:20141106T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/499980
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Eta Carinae and the changing winds: Detection of the Maryland blue 
 (-shifted) Crab
DESCRIPTION:Conférence de Ted Gull\, NASA GoddardRésuméThe massive\, evo
 lved binary\, Eta Carinae\, produces such massive\, interacting winds that
  HST/STIS spatially and spectrally resolves forbidden emission structures 
 of iron. Since the repair of STIS during the space shuttle mission\, SM4\,
  in May 2009\, we have systematically mapped the evolving winds\, along wi
 th X-ray monitoring with SWIFT and optical ground-based spectroscopy. The 
 first observation\, June 2009 caught the early recovery of the binary syst
 em soon after a periastron passage\, when the FUV-bright secondary star pl
 unges deeply within the extended winds of the primary. Since then we follo
 wed the reionization of fossil wind structures and the development of a ne
 w cavity being blown out of the slow\, massive primary wind by the faster\
 , less massive secondary wind. In parallel\, our group is developing 3D hy
 dro/radiative modeling of the phenomena to determine the ionization struct
 ures and ultimately to replicate the HST/STIS observations. By this proces
 s we are able to place estimates on the mass loss parameters and limits on
  changes since earlier studies with HST/STIS in 1998 to 2004. Présentée
  par le Groupe Astronomie et astrophysique du Département de physique de
  l'Université de Montréal. Cette conférence est destinée à des spéci
 alistes dans le domaine de l'astrophysique et sera donnée en anglais.
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