Ten Low Mass Companions from the Keck Precision Velocity Survey

From: Amara Graps (Amara.Graps@mpi-hd.mpg.de)
Date: Wed Oct 17 2001 - 14:11:33 MDT


More data on "extrasolar planets" (or in this case: low mass stars).



From: Steve Vogt <vogt@ucolick.org>
Date: Tue, 16 Oct 2001 16:16:56 GMT (153kb)

Ten Low Mass Companions from the Keck Precision Velocity Survey

Authors: Steven S. Vogt, R. Paul Butler, Geoffrey W. Marcy, Debra A.
Fischer, Dimitri Pourbaix, Kevin Apps, Gregory Laughlin
Comments: 26 pages, TeX, plus 13 postscript figures

     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.


************************************************************************ Amara Graps, PhD | Max-Planck-Institut fuer Kernphysik Heidelberg Cosmic Dust Group | Saupfercheckweg 1 +49-6221-516-543 | 69117 Heidelberg, GERMANY Amara.Graps@mpi-hd.mpg.de * http://www.mpi-hd.mpg.de/dustgroup/~graps ************************************************************************ "Never fight an inanimate object." - P. J. O'Rourke

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