On the progenitor of V838 Monocerotis

Details On the progenitor of V838 Monocerotis On the progenitor of V838 Monocerotis

2004-12-08

arxiv.org/abs/astro-ph/0412183v3

Astronomy and Astrophysics

Astrophysics

12 pages, 7 figures, accepted for publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20042485

We summarize and analyze the available observational data on the progenitor and the enviroment of V838 Mon. From the available photometric data for the progenitor of V838 Mon we exclude the possibility that the object before eruption was an evolved red giant star (AGB or RGB star). We find that most likely it was a main sequence or pre-main sequence star of ~ 5-10 M_sun. From the light echo structure and evolution we conclude that the reflecting dust is of interstellar nature rather than blown by V838 Mon in the past. We discuss the IRAS and CO data for interstellar medium observed near the position of V838 Mon. Several interstellar molecular regions have radial velocities similar to that of V838 Mon, so dust seen in the light echo might be related to one of them.

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