Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5116r&link_type=abstract
American Astronomical Society, AAS Meeting #211, #51.16; Bulletin of the American Astronomical Society, Vol. 39, p.817
Astronomy and Astrophysics
Astronomy
Scientific paper
V1280 Scorpii (Nova Scorpii 2007a) was discovered Feb 4, 2007 while it was still brightening. We obtained the first of several spectra on Feb 14, 10 days after discovery and 2 days before maximum visible brightness. V1280 Sco is unique in our experience in that the "F star” spectral phase was characteristic of the infrared portion of the spectrum as well as the optical. The early infrared spectra were devoid of emission lines, showing instead strong, narrow absorption features of H I, N I, O I, and Ca II. V1280 Sco is also distinctive in that its spectral development is the slowest we have witnessed in a nova. Data from Oct 10, nine months after outburst show an emission spectrum typical of a classical Fe II nova, and similar to what was reported for V1280 Sco only a few days after outburst. In addition to Fe II, lines of N I and O I were still present at that late date. Helium was just beginning to be singly ionized, and the He I line at 1.0830 microns, which is frequently the strongest IR emission line in novae, was weaker than its neighbor Paschen gamma. Interestingly, this leisurely rate of change of the spectrum is not reflected in the visible light curve, which displays a rapid, monotonic decline after maximum brightness. Much of this decline is probably due to the existence of a dust shell, the formation which is likely to have occurred in late February. However, the onset of dust formation is not marked by a sharp discontinuity in the visible light curve. We suspect that the outburst of V1280 Scorpii was due to the explosion and subsequent ejection of a very massive, slow moving envelope from a carbon-oxygen white dwarf.
Bjorkman Karen
Cushing Michael. C.
Liebert James W.
Lynch David K.
Mazuk Stephan M.
No associations
LandOfFree
Infrared and Optical Spectroscopy of the Nova V1280 Scorpii does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Infrared and Optical Spectroscopy of the Nova V1280 Scorpii, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared and Optical Spectroscopy of the Nova V1280 Scorpii will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1477599