SMARTS Monitoring of the Exotic Variable Star V838 Monocerotis

Details SMARTS Monitoring of the Exotic Variable Star V838 Monocerotis SMARTS Monitoring of the Exotic Variable Star V838 Monocerotis

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..382b&link_type=abstract

NOAO Proposal ID #2010A-0382

Computer Science

Scientific paper

In recent years, one or more new classes of luminous red stellar transients have been discovered. The prototype is the Galactic star V838 Monocerotis, whose 2002 outburst illuminated a spectacular light echo, extensively imaged by HST. Polarimetric imaging of the echo with HST has yielded a geometric distance of 6.2 kpc, making V838 Mon at maximum intermediate in luminosity between a classical nova and a Type II SN. Unlike a nova, the star remained a luminous red supergiant throughout its outburst. Recently, the slowly expanding dusty photosphere of V838 Mon has ingested a B-type companion star, leading to spectacular photometric and spectroscopic variability. I propose to continue to monitor these changes using synoptic service observing with the SMARTS 1.3m (photometry) and 1.5m (spectroscopy) telescopes.

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