Issue |
A&A
Volume 395, Number 1, November III 2002
|
|
---|---|---|
Page(s) | 161 - 167 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20021243 | |
Published online | 29 October 2002 |
Near infra-red spectroscopy of V838 Monocerotis
Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India
Corresponding author: D. P. K. Banerjee, orion, ashok@prl.ernet.in
Received:
10
June
2002
Accepted:
27
August
2002
Near – IR, multi – epoch, spectroscopic and photometric observations of the
enigmatic, eruptive variable V838 Mon in the JHK bands are reported.
One of the unusual features of the spectra is the detection
of several strong neutral TiI lines in emission in the K band. From
the strength of these lines, the mass of the ejected envelope is
estimated to be in the range 10-7 to 10.
The spectra also show the strong presence of the first and second
overtone 12CO bands seen in the K and H bands. The CO bands show
a complex evolution. Deep
water bands at 1.4
m and 1.9
m are also seen later
in the object's evolution. Blackbody fits to the JHK photometric data
show that V838 Mon has evolved to temperatures between 2400–2600 K
by ~130 days after outburst. The spectra at this stage have the
general characteristics of a very cool M giant.
Key words: stars: individual: V838 Mon / stars: supergiants / infrared: stars / stars: novae / techniques: spectroscopic
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.