Analysis of the Hipparcos measurements of u andromedae: A mass estimate of its outermost known planetary companion

Tsevi Mazeh, Shay Zucker, Andrea Dalla Torre, Floor Van Leeuwen

Research output: Contribution to journalArticlepeer-review

Abstract

We present an analysis of Hipparcos astrometric measurements of u 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 semimajor axis of 0.6 mas. Using the Hipparcos data together with the spectroscopic elements, we found a semimajor axis of 1.4 ± 0.6 mas. This implies a mass of 10.1+4.7-4.6 Jupiter masses for that planet of u And.

Original languageEnglish
Pages (from-to)L149-L151
JournalAstrophysical Journal
Volume522
Issue number2 PART 2
DOIs
StatePublished - 10 Sep 1999

Keywords

  • Astrometry
  • Planetary systems
  • Stars: Individual (u Andromedae)

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