Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733811w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #338.11; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Optical spectra of the emission lines in a sample of 6 recent novae (the recurrent novae YY Dor, N LMC 2009, and U Sco, and the He-Ne novae DE Cir, V2672 Oph, and KT Eri) show Balmer lines consisting of a broad pedestal of emission with a narrower superposed central emission component. While the broad pedestal is generally modelled as an expanding equatorial torus, we argue that it arises in an accretion disk that either survives the explosion or reconstitutes itself within a day or so of the explosion. The velocities are comparable to those expected from an inner disk radius near the surface of a near-Chandrasekhar-mass white dwarf. We will present time-resolved spectra of these novae, taken with the SMARTS 1.5m telescope at Cerro Tololo.
Battisti Andrew
Walter Frederick M.
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