PG-1002- A BE STAR APPARENTLY AT Z-GREATER-THAN+10 KILOPARSECS(506 )

Citation
Fa. Ringwald et al., PG-1002- A BE STAR APPARENTLY AT Z-GREATER-THAN+10 KILOPARSECS(506 ), The Astrophysical journal, 497(2), 1998, pp. 717-720
Citations number
27
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
497
Issue
2
Year of publication
1998
Part
1
Pages
717 - 720
Database
ISI
SICI code
0004-637X(1998)497:2<717:PABSAA>2.0.ZU;2-I
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, wi th T-eff = 14,900 +/- 1200, log g = 4.2 +/- 0.2, and upsilon sin i = 3 40 +/- 50 km s(-1). At b = +51 degrees, 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 r adial velocity is found to be -2 +/- 15 km s(-1), consistent with eith er having been formed in the Galactic disk and subsequently ejected or having been formed in the halo.