[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
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
Abbott D. C., Bieging J. H., Churchwell E., Torres A. V., 1986, ApJ, 303, 239
Antokhin I. I., 1987, Astron. Tsirk., 1489, 5
Antokhin I. I., Cherepashchuk A. M., 1989, Pis'ma Astron. Zh., 15, 701
Antokhin I. I., Bertrand J. F., Lamontagne R., Moffat A. F. J., Matthews J. M., 1995, AJ, 109, 817
Balona L. A., Egan J., Marang F., 1989, MNRAS, 240, 103
Breger M., 1989, Commun. in Asteroseismology, No. 6, Austrian Acad. Sci.
Chalabaev A., Maillard J. P., 1983, A&A, 127, 279
Conti P. S., Massey P., 1989, ApJ, 337, 251
Crawford I. A., Barlow M. J., 1991, A&A, 249, 518
Crowther P. A., Smith L. J., 1997, A&A, in press
Crowther P. A., Hillier D. J., Smith L. J., 1995a, A&A, 293, 172
Crowther P. A., Hillier D. J., Smith L. J., 1995b, A&A, 293, 403
Crowther P. A., Smith L. J., Hillier D. J., Schmutz W., 1995c, A&A, 293, 427
de Jager C., 1980, The Brightest Stars. Reidel, Dordrecht
Eenens P. R. J., Williams P. M., 1994, MNRAS, 269, 1082
Fullerton A. W., Gies D. R., Bolton C. T., 1996, ApJS, 103, 475
Gosset E., Vreux J.-M., Manfroid J., Remy M., Sterken C., 1990, A&AS, 84, 377
Kaper L., Henrichs H. F., 1994, in Moffat A. F. J., Owocki S. P., Fullterton A. W., St-Louis N., eds, Instability and Variability of Hot Stellar Winds, Kluwer, Dordrecht, p. 115
Lamontagne R., Moffat A. F. J., 1987, AJ, 94, 1008
Lamontagne R., Moffat A. F. J., Seggewiss R., 1983, ApJ, 269, 596
Langer N., Hamann W.-R., Lennon M., Najarro F., Pauldrach A. W. A., Puls J., 1994, A&A, 290, 819
Leitherer C., Chapman J. M., Koribalski B., 1995, ApJ, 450, 289
Leitherer C., Chapman J. M., Koribalski B., 1997, ApJ, 481, 898
Maeder A., 1985, A&A, 147, 300
Maeder A., 1996, in Vreux J.-M. et al., eds, Wolf-Rayet Stars in the Framework of Stellar Evolution. Université de Liège, p. 39
Malanushenko V. P., 1988, Trudu Tartusskoii Astrofiz. Observatorii, 92, 60
Marchenko S. V., Moffat A. F. J., 1997, ApJ, submitted
Marchenko S. V., Antokhin I. I., Bertrand J. F., Lamontagne R., Moffat A. F. J., Matthews J. M., Piceno A., 1994, AJ, 108, 678
Marchenko S. V., Moffat A. F. J., Lamontagne R., Tovmassian G. H., 1996, ApJ, 461, 386
Massey P., Conti P. S., 1980, ApJ, 242, 638
Matthews J. M., Moffat A. F. J., 1994, A&A, 283, 493
Moffat A. F. J., 1989, ApJ, 347, 373
Moffat A. F. J., 1996, in Vreux J.-M. et al., eds, Wolf-Rayet Stars in the Framework of Stellar Evolution. Université de Liège, p. 199
Moffat A. F. J., Isserstedt J., 1980, A&A, 85, 201
Moffat A. F. J., Shara M. M., 1986, AJ, 92, 952
Moffat A. F. J., Lamontagne R., Seggewiss W., 1982, A&A, 114, 135
Moffat A. F. J. et al., 1997, A&A, in press
Morris P. W., Eenens P. R. J., Hanson M. M., Conti P. S., Blum R. D., 1996, ApJ, 470, 597
Niemela V. S., 1991, in van der Hucht K. A., Hidayat B., eds, Proc. IAU Symp. 143, Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies. Kluwer, Dordrecht, p. 201
Niemela, V. S., Shara M. M., Wallace D. J., Zurek D. R., Moffat A. F. J., 1997, AJ, in press
Nota A., 1995, in van der Hucht K. A., Williams P. M., eds, Proc. IAU Symp. 163, Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution. Kluwer, Dordrecht, p. 78
Richardson L. L., Brown J. C., Simmons J. F. L., 1996, A&A, 306, 519
Robert C., 1992, Thèse de Doctorat, Université de Montréal
Robert C., Moffat A. F. J., Bastien P., Drissen L., St-Louis N., 1989, ApJ, 347, 1034
Roberts D. H., Lehar J., Dreher J. W., 1987, AJ, 93, 968
Rochowicz K., Niedzielski A., 1995, Acta Astron., 45, 307
Scargle J. D., 1982, ApJ, 263, 835
Schulte-Ladbeck R. E., 1994, in Moffat A. F. J., Owocki S. P., Fullterton A. W., St-Louis N., eds, Instability and Variability of Hot Stellar Winds. Kluwer, Dordrecht, p. 347
Smith L. F., Shara M. M., Moffat A. F. J., 1996, MNRAS, 281, 163
Smith L. J., Lloyd C, Walker E. N., 1985, A&A, 146, 307
St-Louis N., Moffat A. F. J., Drissen L., Bastien P., Robert C, 1988, ApJ, 330, 286
Stothers R. B., Chin C., 1996, ApJ, 468, 842
Tamblyn P., Rieke G. H., Hanson M. N., Close L. M., McCarthy D. W. Jr, Rieke M. J., 1996, ApJ, 456, 206
van der Hucht K. A., 1992, A&AR, 4, 123
van der Hucht K. A., Hidayat B., Admiranto A. G., Supelli K. R., Doom C., 1988, A&A, 199, 217
van Genderen A. M., 1989, A&A, 208, 135
van Genderen A. M., van der Hucht K. A., Steemers W. J. G., 1987, A&A, 185, 131
van Genderen A. M., van der Hucht K. A., Bakker P. R., 1989, A&A, 224, 125
van Genderen A. M. et al., 1991, in van der Hucht K. A., Hidayat B., eds, Proc. IAU Symp. 143, Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies. Kluwer, Dordrecht, p. 129
Vreux J.-M., Andrillat Y., Biémont E., 1990, A&A, 238, 207
Williams P. M., van der Hucht K. A., Thé P. S., 1987, A&A, 182, 91
Williams P. M., Dougherty S. M., Davis R. J., van der Hucht K. A., Bode M., Setia Gunawan D. Y. A., 1997, MNRAS, in press
Willis A. J., 1996, Ap&SS, 237, 145
Similar publications
Sorry the service is unavailable at the moment. Please try again later.
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.