Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...548l..61g&link_type=abstract
The Astrophysical Journal, Volume 548, Issue 1, pp. L61-L63.
Astronomy and Astrophysics
Astronomy
22
Astrometry, Stars: Planetary Systems, Stars: Ρ Coronae Borealis
Scientific paper
Hipparcos and Multichannel Astrometric Photometer (MAP) observations of ρ Coronae Borealis independently display astrometric motion at the period of the proposed ``extrasolar planetary'' companion to the star. Individual least-squares fits to each astrometric data set yield independent estimates of the semimajor axis, inclination, and node angle that are in excellent agreement. A combined solution of the Hipparcos and MAP data yields an inclination of 0.5d, a node at 30.5+/-12.4, and a semimajor axis of 1.66+/-0.35 mas, indicating a companion mass of 0.14+/-0.05 Msolar, over 2 orders of magnitude greater than the minimum mass for the companion as determined by radial velocity studies. This mass is approximately that of an M dwarf star; the companion cannot be a planetary object.
Black David C.
Gatewood George
Han Inwoo
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