V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008

Details V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008 V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21442808l&link_type=abstract

American Astronomical Society, AAS Meeting #214, #428.08; Bulletin of the American Astronomical Society, Vol. 41, p.699

Astronomy and Astrophysics

Astronomy

Scientific paper

We report a time series of IR spectra (0.8 - 2.5 µm) of V1280 Scorpii that shows the spectral evolution of the object including dust formation and partial dust clearing. This unusual nova formed dust during early decline, only a couple of weeks after peak brightness, and therefore t2 and t3 are difficult to interpret. The visible brightness has increased monotonically ever since dust formation and is presently around mV = 10, only 4 magnitudes below peak brightness.
The spectra reveal a very slow development; 20 months after peak brightness the spectrum is still indicative of a very low excitation spectrum: HI, He I, Fe II and Lyman-beta-fluoresced OI still dominate the spectrum. The lines are narrow ( 300 km/s FWHM) though they also show a weak, broader component (2000 km/s FWHM). Even as late as 20 months after outburst many lines show P-cygni profiles, a probable indication that a strong wind continues to blow. Such a wind would also help explain the relatively high brightness of the object this long after peak brightness. Thermal emission from the dust is present and is weakening with time. This suggests that the expanding dust shell is thinning out and progressively exposing the stellar system to our line-of-sight.
This work supported in part by The Aerospace Corporation's Independent Research and Development Program. Observations were carried out at the Infrared Telescope Facility (IRTF) and at Lick Observatory.

Affiliated with

Also associated with

No associations

Rating

V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008 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 V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and V1280 Scorpii: Ir Spectral Evolution From 4 Feb 2007 To 4 Oct 2008 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1107463