Intermediate-Luminosity Red Transients

Details Intermediate-Luminosity Red Transients Intermediate-Luminosity Red Transients

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943609b&link_type=abstract

American Astronomical Society, AAS Meeting #219, #436.09

Astronomy and Astrophysics

Astronomy

Scientific paper

Intermediate-luminosity red transients (ILRTs) are a recently recognized class of stellar eruptions with maximum luminosities between those of classical novae and supernovae. During their outbursts, which generally last a few months, they typically evolve to extremely red colors, completely unlike novae. Prototypes include the M31 "Red Variable" of 1988, V838 Mon, SN 2008S, V1309 Sco, the M99 optical transient of 2010, and the 2008 and 2010 ILRTs in the nearby spiral NGC 300. I will present recent developments in the study of ILRTs. At present, it appears that there are (at least) two separate evolutionary channels leading to ILRT outbursts: mergers of close binaries (accounting for ILRTs in old populations and possibly V838 Mon), and eruptions on stars of about 8-12 Msun, possibly due to electron-capture SNe (accounting for ILRTs in young populations).

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