Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...657..453s&link_type=abstract
The Astrophysical Journal, Volume 657, Issue 1, pp. 453-464.
Astronomy and Astrophysics
Astronomy
16
Stars: Abundances, Stars: Individual: Constellation Name: V838 Herculis, Stars: Individual (V4160 Sagittarii), Stars: Novae, Cataclysmic Variables
Scientific paper
V838 Her and V4160 Sgr were two of the fastest classical novae ever observed, exhibiting light curve declines of 2 mag in less than 2 days. Both novae also showed strong neon emission lines, indicative of an outburst occurring on an oxygen-neon-magnesium white dwarf. Being the brighter of the two, V838 Her has an extensive set of X-ray to radio observations obtained during its first year after outburst. V4160 Sgr has a more modest set of ultraviolet and optical spectra, which show it to be similar to V838 Her, not just in its light curve evolution but also in its spectral development. The observed attributes imply that these novae occurred on extremely massive white dwarfs. This paper uses the Cloudy photoionization code to fit multiple epochs of emission line spectra to determine the elemental abundances of the ejecta of V838 Her and V4160 Sgr.
Schwarz Greg J.
Shore Steven N.
Starrfield Sumner
Vanlandingham Karen M.
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