Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-13
Astrophys.J. 522 (1999) L149-L151
Astronomy and Astrophysics
Astrophysics
9 pages, 2 figures, LaTex, aastex, accepted for publication by ApJ Letters
Scientific paper
10.1086/312231
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.
Dalla Torre Andrea
Mazeh Tsevi
van Leeuwen Floor
Zucker Shay
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