AAS 195th Meeting, January 2000
Session 36. White Dwarfs New and Old
Display, Thursday, January 13, 2000, 9:20am-6:30pm, Grand Hall

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[36.06] Nova V382 Velorum: first Hubble Space Telescope spectrum and NLTE atmospheric modeling

C.I. Short, P.H. Hauschildt (Dept. of Physics & Astronomy, and Center for Simulational Physics, U. Georgia), S.N. Shore (Dept. of Physics & Astronomy, Indiana Univ. South Bend), S. Starrfield (Dept. of Physics & Astronomy, Arizona State U.), E. Baron (Dept. of Physics & Astronomy, U. Oklahoma)

We present the initial fitting of non-LTE nova models to the first ultraviolet spectra of Nova V382 Velorum taken with the Hubble Space Telescope Imaging Spectrograph. We find a best fit T\rm eff of 19\,000 K and that the velocity field is better described by a radiatively driven wind law rather than that of ballistic expansion. We find that by the time that the first HST spectrum was taken at May 31.3 UT, which was eight days after visual maximum, the region around the Mg II hk lines already exhibited strong nebular emission on top of the optically thick envelope spectrum. However, at shorter wavelengths the spectrum still corresponds to the optically thick wind phase of the nova outburst, and we are able to identify the P-Cyg profiles of the Al III \lambda 1855 and 1863 lines. This work was supported in part by NSF grant AST-9720704, NASA ATP grant NAG 5-3018 and LTSA grant NAG 5-3619 to the University of Georgia.

The author(s) of this abstract have provided an email address for comments about the abstract: cis@calvin.physast.uga.edu

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