Abstract
Nova V2362 Cygni has undergone a number of very unusual changes. Ground-based spectroscopy initially revealed a normal sequence of events: the object faded and its near-infrared emission lines gradually shifted to higher excitation conditions until about day 100 when the optical fading reversed and the object slowly brightened. This was accompanied by a rise in the Swift X-ray telescope flux and a sudden shift in excitation of the visible and IR spectrum back to low levels. The new lower excitation spectrum revealed broad line widths and many P-Cygni profiles, all indicative of the ejection of a second shell. Eventually, dust formed, the X-ray brightness - apparently unaffected by dust formation - peaked and then declined, and the object faded at all wavelengths. The Spitzer dust spectra revealed a number of solid-state emission features that, at this time, are not identified.
Original language | English (US) |
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Pages (from-to) | 1815-1827 |
Number of pages | 13 |
Journal | Astronomical Journal |
Volume | 136 |
Issue number | 5 |
DOIs | |
State | Published - Nov 1 2008 |
Keywords
- Accretion, accretion disks
- Line: profiles
- Novae, cataclysmic variables
- Stars: winds, outflows
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science