A Distant Stellar Companion in the υ Andromedae System
- 10 June 2002
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 572 (1) , L79-L81
- https://doi.org/10.1086/341554
Abstract
Upsilon Andromedae is an F8V star known to have an extrasolar system of at least 3 planets in orbit around it. Here we report the discovery of a low-mass stellar companion to this system. The companion shares common proper motion, lies at a projected separation of ~750 AU, and has a spectral type of M4.5V. The effect of this star on the radial velocity of the brighter primary is negligible, but this system provides an interesting testbed for stellar planetary formation theory and understanding dynamical stability since it is the first multiple planetary system known in a multiple stellar system.Comment: 4 pages, 2 figures, to be published in June ApJ LetterKeywords
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