V838 Mon: Observations of the Light Echo in Circumstellar Dust

Details V838 Mon: Observations of the Light Echo in Circumstellar Dust V838 Mon: Observations of the Light Echo in Circumstellar Dust

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...206.2811s&link_type=abstract

American Astronomical Society Meeting 206, #28.11; Bulletin of the American Astronomical Society, Vol. 37, p.470

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Scientific paper

V838 Mon was a previously unknown variable star that was discovered in outburst early in 2002. It exhibited 3 peaks in its outburst and rapidly evolved to become an L Supergiant. Early spectra showed s-process elements and later infrared spectra showed VO, AlO, and other molecules implying that the ejected material was oxygen rich. A light echo was discovered in late February 2002 and observations with the ACS on HST have provided spectacular images as the light echo moved through a region of dust surrounding the outbursting star. While there is some controversy about whether or not dust formed in the ejected material of the current outburst, there is a dust shell surrounding this variable star. I briefly describe a worldwide campaign to study this variable in outburst and return to quiescence. I gratefully acknowledge partial support from grants to ASU from NSF, NASA, CHANDRA, and SPITZER.

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