A spectroscopic search for colliding stellar winds in O-type close binary systems. II - Plaskett's star (HD 47129)

1992 ◽  
Vol 396 ◽  
pp. 238 ◽  
Author(s):  
Michael S. Wiggs ◽  
Douglas R. Gies
Keyword(s):  
Binary Systems ◽  
Close Binary ◽  
Stellar Winds ◽  
Close Binary Systems

scholarly journals Colliding Stellar Winds in O-type Close Binary Systems

1992 ◽  
Vol 135 ◽  
pp. 146-148
Author(s):  
D.R. Gies ◽  
M.S. Wiggs
Keyword(s):  
Binary Systems ◽  
Optical Emission ◽  
Emission Lines ◽  
Optical Observations ◽  
Close Binary ◽  
High Dispersion ◽  
Stellar Winds ◽  
Close Binary Systems ◽  
Circumstellar Gas ◽  
The Individual

In close binary systems of O-type stars, the individual stellar winds will collide between the stars to form shock fronts (Stevens et al. 1992). Binaries with equally luminous stars will have winds of comparable strength, and the shock will occur near the mid-plane between the stars, but in binaries of unequal luminosity, the interaction will occur along a bow shock wrapped around the star with the weaker wind. The presence of the shock region can be detected through excess X-ray emission (Chlebowski & Garmany 1990), and orbital phase-related variations in the UV P Cygni lines (Shore & Brown 1988) and optical emission lines (formed in high density regions of circumstellar gas).We have begun a search for colliding winds through a study of the optical emission lines and UV P Cygni lines in four massive binaries, AO Cas (Gies & Wiggs 1991), Plaskett’s star = HD 47129 (Wiggs & Gies 1992), 29 UW CMa and ι Ori. The optical observations consist of high S/N spectra of the Hα and He I λ6678 region obtained with the University of Texas McDonald Observatory 2.1-m telescope and coudé Reticon system. The UV observations were culled from archival IUE high dispersion spectra of several P Cygni features (N V λ1240, Si IV λ1400, C IV λ1550).

scholarly journals Polarimetry of Close Binary Systems; Observations and Interpretations

1980 ◽  
Vol 88 ◽  
pp. 65-70
Author(s):  
Ian S. McLean
Keyword(s):  
Binary Systems ◽  
Stokes Parameters ◽  
Close Binary ◽  
Stellar Winds ◽  
Line Profiles ◽  
Orbital Inclination ◽  
X Ray ◽  
Close Binary Systems ◽  
A New Technique ◽  
X Ray Binaries

Polarization caused by scattering of starlight on gaseous extrastellar material in close binary systems is reviewed. A simple physical derivation is given to illustrate how in principle, variations synchronous with the orbital period of the Stokes parameters of the linear polarization can yield the orbital inclination and other parameters. High resolution multichannel spectropolarimetry across the emission line profiles of binaries is discussed as a new technique in studying the physics and kinematics of gaseous streams and stellar winds. The methods have application to a range of binary objects including systems like Algol and Beta Lyrae, X-ray binaries, Of and Wolf-Rayet binaries, VV Cephei stars and symbiotic stars. Some new observational results are presented.

A spectroscopic search for colliding stellar winds in O-type close binary systems. IV - IOTA Orionis

1993 ◽  
Vol 403 ◽  
pp. 752 ◽  
Author(s):  
Douglas R. Gies ◽  
Michael S. Wiggs ◽  
William G., Jr. Bagnuolo
Keyword(s):  
Binary Systems ◽  
Close Binary ◽  
Stellar Winds ◽  
Close Binary Systems

scholarly journals A Spectroscopic Search for Colliding Stellar Winds in O‐Type Close Binary Systems. V. HD 149404

2001 ◽  
Vol 554 (2) ◽  
pp. 1070-1078 ◽  
Author(s):  
M. L. Thaller ◽  
D. R. Gies ◽  
A. W. Fullerton ◽  
L. Kaper ◽  
R. Wiemker
Keyword(s):  
Binary Systems ◽  
Close Binary ◽  
Stellar Winds ◽  
Close Binary Systems

scholarly journals Colliding Stellar Winds in Close Binary Systems

1992 ◽  
Vol 151 ◽  
pp. 359-362
Author(s):  
Steven N. Shore ◽  
Michael J. Corcoran
Keyword(s):  
General Theory ◽  
Binary Systems ◽  
Close Binary ◽  
Stellar Winds ◽  
Close Binary Systems ◽  
Ultraviolet Observations

We describe some of the observational phenomena associated with colliding stellar winds, focussing especially on close WR+O binaries. In particular, we report some new ultraviolet observations of CQ Cep and V444 Cyg. We also discuss some of the general theory of such wind collisions.

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

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