Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.3606s&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #36.06; Bulletin of the American Astronomical Society, Vol. 31, p.1420
Astronomy and Astrophysics
Astronomy
Scientific paper
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 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 λ 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.
Baron Eddie
Hauschildt Peter. H.
Shore Steve N.
Short Christopher Ian
Starrfield Summer
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