Haro's star (PG 1444+236): A hot subdwarf of the Galactic halo?статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We present our photometric and spectroscopic observations of the hot emission-line high-latitude (b = +64degrees) star discovered by Haro. The star exhibited no light variability during 1993-2001. Based on our observations and on the detailed study of the star by Herbig (1992), we improved its parameters, T = 22000 K and log g = 4.2, and inferred its evolutionary status. We show that Haro's star does not belong to the class of protoplanetary objects but is most likely a hot subdwarf of the Galactic halo with an emission-line spectrum formed in the outer layers of the star or in its stellar wind. (C) 2002 MAIK "Nauka/Interperiodica".