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A Combined HIPPARCOS and Multichannel Astrometric Photometer Study of the Proposed Planetary System of Rho Coronae BorealisHipparcos and Multichannel Astrometric Photometer (MAP) observations of rho 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 0.5 deg, 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 solar masses over two 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.
Document ID
20020021911
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gatewood, George (Pittsburgh Univ. Pittsburgh, PA United States)
Han, Inwoo (Korea Astronomy Observatory Taejon, Korea, Republic of)
Black, David C. (Lunar and Planetary Inst. Houston, TX United States)
Date Acquired
August 20, 2013
Publication Date
February 10, 2001
Publication Information
Publication: The Astrophysical Journal
Volume: 548
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NSF AST-86-17642
CONTRACT_GRANT: NASW-4574
CONTRACT_GRANT: NAG2-53
Distribution Limits
Public
Copyright
Other