Any hot-Jupiter around M dwarfs?

Details Any hot-Jupiter around M dwarfs? Any hot-Jupiter around M dwarfs?

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006tafp.conf..111b&link_type=abstract

"Tenth Anniversary of 51 Peg-b: Status of and prospects for hot Jupiter studies. Colloquium held at Observatoire de Haute Proven

Physics

7

Scientific paper

While over 160 planets have been found to orbit F, G and K stars, only five have been found around M dwarfs. In spite of their small number, the planets identified around very-low-mass stars exhibit some interesting statistical properties. In particular, they include no hot-Jupiter and very few Jupiter-mass planets at any period. A different frequency of Jupiter-mass planets between sun-like stars and M dwarfs may point toward a stellar mass dependency in planet formation processes. Our recent work on M-dwarf metallicity suggests however that they might have lower abundances of heavy elements than earlier-type stars. Given the well established overabundance of planets around metal-rich stars, one needs to verify whether metallicity alone can explain the statistical properties of M-dwarf planets. We use simulations to investigate how detection biases affect the apparent frequency of planets orbiting M dwarfs, and to check how the lower mean metallicity of M dwarfs would affect their planet population if the planet-metallicity correlation found for sun-like stars applies to them as well.

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