Astron. Astrophys. 339, 782-786 (1998)

HIP 60350: an extreme runaway star ^*

H.M. Maitzen ¹, E. Paunzen ¹, R. Pressberger ¹, A. Slettebak ² and R.M. Wagner <sup>2

1</sup> Institut für Astronomie der Universität Wien, Türkenschanzstrasse 17, A-1180 Wien, Austria (last__name@astro.ast.univie.ac.at)
² Department of Astronomy, The Ohio State University, 174 West 18th Avenue, Columbus, OH 43210, USA

Received 20 July 1998 / Accepted 8 September 1998

Abstract

Using Hipparcos proper motion as well as published and our own radial velocity data we identify HIP 60350 as fastest young B-type runaway star ejected 20 Myr ago or slightly less from the galactic plane, probably at a distance from the galactic center corresponding to spiral arm -II. Both the LSR velocity (417 kms^-1) and the mass of the star point to dynamical cluster ejection rather than to a supernova scenario. Published and our own photometric data as well as our spectroscopic evidence reveal no noticeable peculiarity and a spectral type B4/5 V. No significant radial velocity variations have been found during the last two decades.

Key words: stars: chemically peculiar stars: early-type stars: kinematics Galaxy: kinematics and dynamics

* Based on data obtained with the Multiple Mirror Telescope, a joint facility of the University of Arizona and the Smithsonian Institution and from the ESA Hipparcos astrometry satellite

Send offprint requests to: H.M. Maitzen

SIMBAD Objects

Contents

• 1. Introduction
• 2. The observations
  • 2.1. and uvby photometry
  • 2.2. Spectroscopy
    • 2.2.1. L. Figl Observatory (University of Vienna)
    • 2.2.2. Multi Mirror Telescope (University of Arizona)
• 3. Discussion
  • 3.1. Peculiarity
  • 3.2. Kinematics and evolutionary status
• Acknowledgements
• References

© European Southern Observatory (ESO) 1998

Online publication: October 22, 1998
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