PHL 346, a Beta Cephei star situated at more than 5 KPC from the Galactic plane?

Details PHL 346, a Beta Cephei star situated at more than 5 KPC from the Galactic plane? PHL 346, a Beta Cephei star situated at more than 5 KPC from the Galactic plane?

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201l...5w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 1, July 1988, p. L5-L8.

Astronomy and Astrophysics

Astrophysics

25

B Stars, Cepheid Variables, Main Sequence Stars, Star Formation, Stellar Oscillations, Light Curve, Stellar Atmospheres

Scientific paper

The high-latitude early-B star PHL 346 is a pulsating variable with a period of 0.152 days. This period, the fact that color and brightness vary in phase, and the atmospheric parameters of PHL 346 suggest that it is a β Cephei variable. The star would then have a mass of about 10 solar masses and an age of about 107years. PHL 346 is faint (mv = 11.44) and is located at a high galactic latitude of -58°, so that it appears excluded that it originated in the galactic plane only 107yr ago. The pulsation of PHL 346 thus lends support to the idea that star formation far from the plane of the galaxy can occur. It is argued, more generally, that the study of the variability of high-latitude B stars provides a strong test for the nature of these stars.

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