Polarization variability among Wolf-Rayet stars. V - Linear polarization of the bright Cygnus stars and an anticorrelation of variability with wind speed
1989; IOP Publishing; Volume: 347; Linguagem: Inglês
10.1086/168194
ISSN1538-4357
AutoresCarmelle Robert, A. F. J. Moffat, Pierre Bastien, Laurent Drissen, Nicole St.-Louis,
Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (91) References (84) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Polarization Variability among Wolf-Rayet Stars. V. Linear Polarization of the Bright Cygnus Stars and an Anticorrelation of Variability with Wind Speed Robert, Carmelle ; Moffat, Anthony F. J. ; Bastien, Pierre ; Drissen, Laurent ; St. -Louis, Nicole Abstract This paper presents polarimetric data for seven of the eight bright WR stars in Cygnus. Six of the stars show only random, low-amplitude modulation on time scales of hours to days. One of these behaves as expected for a long-period WR + O system with an elliptical orbit. The eighth star is the only short-period WR + O binary in the sample. It is confirmed that the degree of random, intrinsic scatter in polarization is correlated with spectral subclass and terminal wind velocity. It is suggested that this is caused by the presence of propagating blobs which form, survive, and/or grow more easily in slower winds. Two models are proposed to explain the origin of the blobs. Publication: The Astrophysical Journal Pub Date: December 1989 DOI: 10.1086/168194 Bibcode: 1989ApJ...347.1034R Keywords: Binary Stars; Linear Polarization; Stellar Winds; Wolf-Rayet Stars; Cygnus Constellation; Stellar Models; Variable Stars; Astrophysics; POLARIZATION; STARS: BINARIES; STARS: WINDS; STARS: WOLF-RAYET full text sources ADS | data products SIMBAD (26) Related Materials (7) Part 1: 1987ApJ...322..870S Part 2: 1987ApJ...322..888D Part 3: 1988ApJ...330..286S Part 4: 1989ApJ...343..902R Part 6: 1990ApJ...359..211R Part 7: 1992ApJ...386..288D Part 8: 1993ApJ...413..724M
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