Title: Terminal velocities for a large sample of O stars, B supergiants, and Wolf-Rayet stars
Abstract:view Abstract Citations (478) References (63) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Terminal Velocities for a Large Sample of O Stars, B Supergiants, and Wol...view Abstract Citations (478) References (63) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Terminal Velocities for a Large Sample of O Stars, B Supergiants, and Wolf-Rayet Stars Prinja, Raman K. ; Barlow, M. J. ; Howarth, Ian D. Abstract It is argued that easily measured, reliable estimates of terminal velocities for early-type stars are provided by the central velocity asymptotically approached by narrow absorption features and by the violet limit of zero residual intensity in saturated P Cygni profiles. These estimators are used to determine terminal velocities, v(infinity), for 181 O stars, 70 early B supergiants, and 35 Wolf-Rayet stars. For OB stars, the values are typically 15-20 percent smaller than the extreme violet edge velocities, v(edge), while for WR stars v(infinity) = 0.76 v(edge) on average. New mass-loss rates for WR stars which are thermal radio emitters are given, taking into account the new terminal velocities and recent revisions to estimates of distances and to the mean nuclear mass per electron. The relationships between v(infinity), the surface escape velocities, and effective temperatures are examined. Publication: The Astrophysical Journal Pub Date: October 1990 DOI: 10.1086/169224 Bibcode: 1990ApJ...361..607P Keywords: B Stars; O Stars; Stellar Motions; Stellar Winds; Terminal Velocity; Wolf-Rayet Stars; Opacity; Supergiant Stars; Velocity Measurement; Astrophysics; STARS: EARLY-TYPE; STARS: WINDS; STARS: WOLF-RAYET full text sources ADS | data products SIMBAD (286) MAST (1) INES (1) Related Materials (1) Erratum: 1991ApJ...383..466PRead More