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Continuum and emission line observations of Wolf-Rayet stars: single and “WR+abs” objects

Published online by Cambridge University Press:  07 August 2017

Patrick W. Morris
Patrick W. Morris*
Affiliation:
Joint Institute for Laboratory Astrophysics Campus Box 440, University of Colorado Boulder, CO 80309, U.S.A.

Abstract

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The UV — IR properties of the continuous energy distribution of single WR stars in the Galaxy and LMC are reviewed. The observed, dereddened distributions may be approximated as a power law Fλ ∼ λ−α with a non-Rayleigh Jeans range of α directly associated with the emission of excess flux over the full wavelength range and across all spectral subtypes. The observational results are compared to published NLTE models, where we find an important discrepancy in the frequency distribution of α for Galactic WN stars. A dependency of emission line equivalent widths on the continuum flux at line center is discussed; the systematic offset of the absorption line (but otherwise presumed single) objects is examined, and the observed behavior is compared to models and explained with simple theory.

Keywords

stars: atmospheresstars: fundamental parametersstars: Wolf-Rayet
Type
Session II - Model atmospheres for single Wolf-Rayet stars
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 96 - 104
Copyright
Copyright © Kluwer 1995 

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