Infrared observations of V838 Mon

Details Infrared observations of V838 Mon Infrared observations of V838 Mon

2006-06-20

arxiv.org/abs/astro-ph/0606491v1

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures, to appear in ASP Conf. Ser., The Nature of V838 Mon and Its Light Echo, eds. R.L.M. Corradi and U. Munari

Scientific paper

We describe the results of fitting simple spherically symmetric models to the first overtone CO and AlO A-X (2-0) bands in V838 Mon. We find that the temperature and column of both CO and AlO systematically decline over the period 2002 October - 2005 February and that an additional, hotter and denser, component is present from 2005 January. We also describe the results of an observation of the star and its light echo at 850micron. We do not detect the `infrared' echo at these wavelength, and place an upper limit of 3x10^7 cm^-2 on the column of grains.

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