HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary

Details HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.1809b&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #18.09; Bulletin of the American Astronomical Society, Vol. 25, p.1321

Astronomy and Astrophysics

Astronomy

Scientific paper

The TLUSTY model code of Hubeny & Lanz are used to compute the B star photospheric spectrum in the ultraviolet and optical regions. These models treated H and He continua in NLTE, but the lines were assumed to be in detailed balance. A few models were computed with 5 levels of H and 14 levels of He I, plus continua, in NLTE. There were no significant differences between the models with the lines treated in detailed balance and in explicit NLTE. Solar abundances were assumed throughout this study. Effective temperatures are derived by fitting line profiles observed by the Hubble Space Telescope GHRS to the computed synthetic spectra. We find T_eff= 15300 K, and a rotational velocity of about 150 km s(-1) . The strengths of the Si II resonance lines in the ultraviolet are shown to be anomalously weak in the observed spectra, consistent with an overionization of Si II by 1.1 dex. Additional model atmospheres were computed treating the bound levels of Si II and Si III and the corresponding continua explicitly in NLTE. We will report on the results of these ongoing model studies of zeta Aur B and present the latest estimates of the stellar parameters (T_eff, log g, and vrot). This work is supported by HST Grant GO-3626.01-91A to the University of Colorado.

Affiliated with

Also associated with

No associations

Rating

HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HST/GHRS Studies of zeta Aurigae II. A Non-LTE Model Atmosphere Analysis of the B-Type Secondary will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-778167