A NEW VLA-HIPPARCOSDISTANCE TO BETELGEUSE AND ITS IMPLICATIONS
- 10 March 2008
- journal article
- Published by American Astronomical Society in The Astronomical Journal
- Vol. 135 (4), 1430-1440
- https://doi.org/10.1088/0004-6256/135/4/1430
Abstract
The distance to the M supergiant Betelgeuse is poorly known, with the Hipparcos parallax having a significant uncertainty. For detailed numerical studies of M supergiant atmospheres and winds, accurate distances are a prerequisite to obtaining reliable estimates for many stellar parameters. New high spatial resolution, multiwavelength, NRAO33The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Very Large Array (VLA) radio positions of Betelgeuse have been obtained and then combined with Hipparcos Catalogue Intermediate Astrometric Data to derive new astrometric solutions. These new solutions indicate a smaller parallax, and hence greater distance (197 ± 45 pc), than that given in the original Hipparcos Catalogue (131 ± 30 pc) and in the revised Hipparcos reduction. They also confirm smaller proper motions in both right ascension and declination, as found by previous radio observations. We examine the consequences of the revised astrometric solution on Betelgeuse's interaction with its local environment, on its stellar properties, and its kinematics. We find that the most likely star-formation scenario for Betelgeuse is that it is a runaway star from the Ori OB1 association and was originally a member of a high-mass multiple system within Ori OB1a.Keywords
This publication has 56 references indexed in Scilit:
- 25 Orionis: A Kinematically Distinct 10 Myr Old Group in Orion OB1aThe Astrophysical Journal, 2007
- Variability in red supergiant stars: pulsations, long secondary periods and convection noiseMonthly Notices of the Royal Astronomical Society, 2006
- The CIDA Variability Survey of Orion OB1. I. The Low-Mass Population of Ori OB1a and 1bThe Astronomical Journal, 2005
- An analytical representation of the systematic differences HIPPARCOS-FK5Astronomy & Astrophysics, 2001
- The Origin of Runaway StarsThe Astrophysical Journal, 2000
- Instability of isothermal stellar wind bowshocksNew Astronomy, 1998
- Radio Photospheres of Long‐Period Variable StarsThe Astrophysical Journal, 1997
- Mass loss from evolved stars. III - Mass loss rates for fifty stars from CO J = 1-0 observationsThe Astrophysical Journal, 1985
- Carbon, nitrogen, and oxygen abundances in BetelgeuseThe Astrophysical Journal, 1984
- On the distribution of interstellar matter around the sunThe Astronomical Journal, 1984