EDP Sciences
Free access
Issue
A&A
Volume 395, Number 1, November III 2002
Page(s) 161 - 167
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20021243


A&A 395, 161-167 (2002)
DOI: 10.1051/0004-6361:20021243

Near infra-red spectroscopy of V838 Monocerotis

D. P. K. Banerjee and N. M. Ashok

Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India

(Received 10 June 2002 / Accepted 27 August 2002 )

Abstract
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 $^{-5}~M_\odot$. 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  ${\rm {\mu}}$m and 1.9  ${\rm {\mu}}$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

Offprint request: D. P. K. Banerjee, orion, ashok@prl.ernet.in

SIMBAD Objects



© ESO 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.