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.
|Autori:||Lynch DK; Woodward CE; Gehrz R; Helton LA; Rudy RJ; Russell RW; Pearson R; Venturini CC; Mazuk S; Rayner J; Ness JU; Starrfield S; Wagner RM; Osborne JP; Page K; Puetter RC; Perry RB; Schwarz G; Vanlandingham K; Black J; Bode M; Evans A; Geballe T; Greenhouse M; Hauschildt P; Krautter J; Liller W; Lyke J; Truran J; Kerr T; Eyres SPS; Shore S.N.|
|Titolo:||NOVA V2362 CYGNI (NOVA CYGNI 2006): SPITZER, SWIFT, AND GROUND-BASED SPECTRAL EVOLUTION|
|Anno del prodotto:||2008|
|Digital Object Identifier (DOI):||10.1088/0004-6256/136/5/1815|
|Appare nelle tipologie:||1.1 Articolo in rivista|