Journal Article

Mergerburst transients of brown dwarfs with exoplanets

Ealeal Bear, Amit Kashi and Noam Soker

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 416, issue 3, pages 1965-1970
Published in print September 2011 | ISSN: 0035-8711
Published online September 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19171.x
Mergerburst transients of brown dwarfs with exoplanets

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We explore the properties of an optical transient event formed by the destruction of a planet by a brown dwarf (BD) – a BD–planet mergerburst. When a massive planet approaches a BD towards a merging process it will be tidally destroyed and will form an accretion disc around the BD. The viscosity in the disc sets the characteristic time for the event – several days. We suggest that BD–planet mergerburst events have light curves resembling those of other intermediate luminosity optical transient events, such as V838 Mon, but at shorter time-scales and lower luminosities. With the high percentage coverage of the sky, we expect that such events will be detected in the near future.

Keywords: accretion, accretion discs; planet–star interactions; brown dwarfs; stars: flare

Journal Article.  4641 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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