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J/A+A/527/A140 Mass constraints on substellar companions (Reffert+, 2011)
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Beginning of ReadMe :J/A+A/527/A140 Mass limits on substellar companions (Reffert+, 2011)
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Mass constraints on substellar companion candidates from the re-reduced
Hipparcos intermediate astrometric data: nine confirmed planets and two
confirmed brown dwarfs.
Reffert S., Quirrenbach A.
<Astron. Astrophys., 527, A140 (2011)>
=2011A&A...527A.140R
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ADC_Keywords: Stars, double and multiple ; Planets ; Stars, masses
Keywords: astrometry - binaries: spectroscopic - planetary systems -
brown dwarfs
Abstract:
The recently completed re-reduction of the Hipparcos data by van
Leeuwen (2007, Astrophys. Space Library 350) makes it possible to
search for the astrometric signatures of planets and brown dwarfs
known from radial velocity surveys in the improved Hipparcos
intermediate astrometric data.
Our aim is to put more significant constraints on the orbital
parameters which cannot be derived from radial velocities alone, i.e.
the inclination and the longitude of the ascending node, than was
possible before. The determination of the inclination in particular
allows to calculate an unambiguous companion mass, rather than the
lower mass limit which can be obtained from radial velocity
measurements.
Description:
We fitted the astrometric orbits of 310 substellar companions around
258 stars, which were all discovered via the radial velocity method,
to the Hipparcos intermediate astrometric data provided by van
Leeuwen (2007, Astrophys. Space Library 350).