Analysis of The Hipparcos Measurements of Upsilon Andromedae - A Mass Estimate of Its Outermost Known Planetary Companion
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We present an analysis of Hipparcos astrometric measurements of Upsilon Andromedae, a nearby main-sequence star around which three planet candidates have recently been discovered by means of radial-velocity measurements. The stellar orbit associated with the outermost candidate has a period of 1269 +/- 9 days and a minimum semi-major axis of 0.6 milli-arc-sec (mas). Using the Hipparcos data together with the spectroscopic elements we found a semi-major axis of 1.4 +/- 0.6 mas. This implies a mass of 10.1 (+4.7, -4.6) Jupiter masses for that planet of Upsilon Andromedae.
9 pages, 2 figures, LaTex, aastex, accepted for publication by ApJ Letters
9 pages, 2 figures, LaTex, aastex, accepted for publication by ApJ Letters