On winds and X-rays of O-type stars

Abstract

view Abstract Citations (208) References (76) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On Winds and X-Rays of O-Type Stars Chlebowski, Tomasz ; Garmany, Catharine D. Abstract The dependence between stellar wind parameters and their X-ray fluxes is studied. Bolometric corrections are examined as a function of temperature, and a bolometric luminosity scale is proposed for the O-type stars. New mass-loss rates and terminal velocities of 40 well-known, bright single stars or binaries are measured, and the Lyman-alpha profile is modeled for the stars to determine the amount of X-ray-absorbing hydrogen. The mass-loss rates found for the latest O-type stars are significantly smaller than expected from the power-law dependences known for brighter, hot stars. The mass-loss rates for binary system do not differ significantly from those of single stars. A dependence is found between the wind energy of the single stars and the X-ray luminosity, and it is suggested that this dependence is at least partially responsible for the proportionality between L(x) and L(bol). The X-ray fluxes from the close binaries behave in qualitative agreement with predictions from simple theories of colliding stellar winds. Publication: The Astrophysical Journal Pub Date: February 1991 DOI: 10.1086/169687 Bibcode: 1991ApJ...368..241C Keywords: O Stars; Stellar Winds; X Ray Astronomy; Binary Stars; Iue; Stellar Luminosity; Stellar Mass Ejection; Stellar Spectra; Astrophysics; STARS: BINARIES; STARS: EARLY-TYPE; STARS: MASS LOSS; STARS: WINDS; STARS: X-RAYS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (119) MAST (1) INES (1)