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


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HIP 60350: an extreme runaway star *

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

1 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

© European Southern Observatory (ESO) 1998

Online publication: October 22, 1998

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