Ten Low Mass Companions from the Keck Precision Velocity Survey

Details Ten Low Mass Companions from the Keck Precision Velocity Survey Ten Low Mass Companions from the Keck Precision Velocity Survey

2001-10-16

arxiv.org/abs/astro-ph/0110378v1

Astrophys.J. 568 (2002) 352

Astronomy and Astrophysics

Astrophysics

26 pages, TeX, plus 13 postscript figures

Scientific paper

10.1086/338768

Ten new low mass companions have emerged from the Keck precision Doppler velocity survey, with minimum (msini) masses ranging from 0.8 mjup to 0.34 msun. Five of these are planet candidates with msini < 12 mjup, two are brown dwarf candidates with msini ~30 mjup, and three are low mass stellar companions. Hipparcos astrometry reveals the orbital inclinations and masses for three of the (more massive) companions, and it provides upper limits to the masses for the rest. A new class of extrasolar planet is emerging, characterized by nearly circular orbits and orbital radii greater than 1 AU. The planet HD 4208b appears to be a member of this new class. The mass distribution of extrasolar planets continues to exhibit a rapid rise from 10 mjup toward the lowest detectable masses near 1 msat.

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