Article (Scientific journals)
A comprehensive variability study of the enigmatic WN8 stars - Final results
Marchenko, S. V.; Moffat, A. F. J.; Eversberg, T. et al.
1998In Monthly Notices of the Royal Astronomical Society, 294, p. 642
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Keywords :
SKY SURVEYS (ASTRONOMY); VARIABLE STARS; STELLAR CORES; STELLAR WINDS; STELLAR SPECTROPHOTOMETRY; STATISTICAL ANALYSIS; STELLAR ACTIVITY; DATA PROCESSING; TABLES (DATA)
Abstract :
[en] As a conclusion of our all-sky variability survey of the 'enigmatic' variable WN8 stars, we have carried out coordinated multisite photometric and spectroscopic observations of WN8 stars in 1989 and 1994-1995. We confirm the leading role of the stellar core in restructuring the whole wind. This emerges as a statistical trend: the higher the level of the continuum (i.e., core) light variations, the higher the variability of the P Cygni edges of the optical emission lines. However, the form of the correlation between the light and profile variations is generally different for each individual star. The high level of activity of WN8 stars may be supported/induced by pulsational instability.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Marchenko, S. V.;  Montreal, Univ.
Moffat, A. F. J.;  Montreal, Univ.
Eversberg, T.;  Montreal, Univ.
Morel, Thierry  ;  Département de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec, H3C 3J7, Canada
Hill, G. M.;  Dominion Astrophysical Observatory
Tovmassian, G. H.;  Inst. de Astronomia
Seggewiss, W.;  Bonn, Universitaets-Sternwarte
Language :
English
Title :
A comprehensive variability study of the enigmatic WN8 stars - Final results
Publication date :
01 March 1998
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
294
Pages :
642
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 February 2010

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