O V star

A O V star is a main sequence (hydrogen-burning) star of spectral type O and luminosity class V. These stars have between 15 and 90 times the mass of the Sun and surface temperatures between 30,000 and 52,000 K. They are between 30,000 and 1,000,000 times as luminous as the Sun. [Tables 1 and 4, cite journal
title=A new calibration of stellar parameters of Galactic O stars
author=Fabrice Martins, Daniel Schaerer, and D. John Hiller
journal=Astronomy & Astrophysics
volume=436 | year=2005 | pages=1049–1065
doi=10.1051/0004-6361:20042386
bibcode=2005A&A...436.1049M] [Table 5, cite journal
title=The Lyman-Continuum Fluxes and Stellar Parameters of O and Early B-Type Stars
author=William D. Vacca, Catharine D. Garmany, and J. Michael Shull
journal=Astrophysical Journal | volume=460 | year=1996 | month=April | pages=914–931
bibcode=1996ApJ...460..914V
doi=10.1086/177020] These stars are rare; it's estimated that there are no more than 20,000 in the entire Milky Way. [ [http://www.sciencedaily.com/releases/1998/07/980727081019.htm Scientists Begin To Tease Out A Hidden Star's Secrets] , "ScienceDaily", July 27, 1998. Accessed on line November 13, 2007.] Examples include σ Orionis A and 10 Lacertae. [ [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=BD-02%201326A BD-02 1326A] , SIMBAD query result. Accessed on line November 13, 2007.] [ [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=BD-02%201326A 10 Lac] , SIMBAD query result. Accessed on line November 13, 2007.]

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