Hubble Space Telescope Ultraviolet Observations of Epsilon Aurigae

Details Hubble Space Telescope Ultraviolet Observations of Epsilon Aurigae Hubble Space Telescope Ultraviolet Observations of Epsilon Aurigae

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725707h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #257.07; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the initial observations from our multi-epoch COS program, with three planned observations of Epsilon Aurigae. The first observation was obtained on 2010 Sept 1st, shortly after mid-eclipse. The remaining two are scheduled for mid-December 2010, during totality, and during egress in mid-April 2011. Epsilon Aurigae is a complex binary system consisting of a post-AGB F giant orbited by a B star encircled by a large dust cloud. The B star dominates the spectral energy distribution only in the far-UV portion of the spectrum. We use our 900-2050A COS results to 1) model the B star yielding its Teff and log g, 2) search for warm circumbinary material, and 3) confirm the nature of the B star as input to our recent work providing the most detailed SED model yet developed for Epsilon Aurigae (http://adsabs.harvard.edu/abs/2010ApJ...714..549H).

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