Analysis of The Hipparcos Measurements of Upsilon Andromedae - A Mass Estimate of Its Outermost Known Planetary Companion

Preprint

13 July 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9907175

Abstract

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.

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All Related Versions

Version 1, 1999-07-13, ArXiv
Published version: The Astrophysical Journal, 522 (2), L149.

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