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NOVA V2362 CYGNI (NOVA CYGNI 2006): SPITZER, SWIFT, AND GROUND-BASED SPECTRAL EVOLUTION

David K. Lynch ; Charles E. Woodward ; Robert Gehrz ; L. Andrew Helton ; Richard J. Rudy ; Ray W. Russell ; Richard Pearson ; Catherine C. Venturini ; S. Mazuk ; John Rayner ; Jan-Uwe Ness ; Sumner Starrfield ; R. Mark Wagner ; Julian P. Osborne ; Kim Page ; Richard C. Puetter ; R. Brad Perry ; Greg Schwarz ; Karen Vanlandingham ; John H. Black (Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik) ; Michael Bode ; Aneurin Evans ; Thomas Geballe ; Matthew Greenhouse ; Peter Hauschildt ; Joachim Krautter ; William Liller ; James Lyke ; Jim Truran ; T. Kerr ; S. P. S. Eyres ; Steven N. Shore
The Astronomical Journal (1538-3881). Vol. 136 (2008), number 5, 2008 November, p. 1815-1827.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: accretion, accretion disks, line: profiles, novae, cataclysmic variables, stars: winds, outflows



Denna post skapades 2008-10-17. Senast ändrad 2014-09-02.
CPL Pubid: 75802

 

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Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik (2005-2010)

Ämnesområden

Fysik
Astronomi, astrofysik och kosmologi
Stjärnors bildning och utveckling

Chalmers infrastruktur