Analysis of the [ITAL]Hipparcos[/ITAL] Measurements of υ Andromedae: A Mass Estimate of Its Outermost Known Planetary Companion | Zendy

T. Mazeh | Zendy; S. Zucker | Zendy; Andrea Dalla Torre | Zendy; F. van Leeuwen | Zendy

Open Access

Analysis of the [ITAL]Hipparcos[/ITAL] Measurements of υ Andromedae: A Mass Estimate of Its Outermost Known Planetary Companion

Author(s) -

T. Mazeh,

S. Zucker,

Andrea Dalla Torre,

F. van Leeuwen

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312231

Subject(s) - physics , planet , astrophysics , astronomy , minimum mass , star (game theory) , jupiter (rocket family) , radial velocity , stars , space exploration

We present an analysis of Hipparcos astrometric measurements of UpsilonAndromedae, a nearby main-sequence star around which three planet candidateshave recently been discovered by means of radial-velocity measurements. Thestellar 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 theHipparcos data together with the spectroscopic elements we found a semi-majoraxis of 1.4 +/- 0.6 mas. This implies a mass of 10.1 (+4.7, -4.6) Jupitermasses for that planet of Upsilon Andromedae.Comment: 9 pages, 2 figures, LaTex, aastex, accepted for publication by ApJ Letter

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