PG 1002+506: A Be Star Apparently at z > +10 Kiloparsecs

Authors

F. A. Ringwald, Pennsylvania State University
W. R. J. Rolleston, Queen's University Belfast
R. A. Saffer, Villanova University
John R. Thorstensen, Dartmouth College

Document Type

Article

Publication Date

4-20-1998

Publication Title

The Astrophysical Journal

Department

Department of Physics and Astronomy

Abstract

PG 1002+506 is found to be a Be star, one of three found so far by the Palomar-Green survey. Its spectrum is classified as a B5 ± 1 Ve, with T_eff = 14,900 ± 1200, log g = 4.2 ± 0.2, and v sin i = 340 ± 50 km s^-1. At b = +51°, its height above the Galactic plane would therefore be z = +10.8 kpc, putting this apparently young, rapidly rotating star well into the Galactic halo. Its heliocentric radial velocity is found to be -2 ± 15 km s^-1, consistent with either having been formed in the Galactic disk and subsequently ejected or having been formed in the halo.

DOI

10.1086/305480

Dartmouth Digital Commons Citation

Ringwald, F. A.; Rolleston, W. R. J.; Saffer, R. A.; and Thorstensen, John R., "PG 1002+506: A Be Star Apparently at z > +10 Kiloparsecs" (1998). Dartmouth Scholarship. 2278.
https://digitalcommons.dartmouth.edu/facoa/2278