Epoch-dependent absorption line profile variability in lambda Cep

Uuh-Sonda, J. M.; Rauw, Grégor; Eenens, P.; Mahy, Laurent; Palate, Matthieu; Gosset, Eric; Flores, C. A.

Download

Article (Scientific journals)

Epoch-dependent absorption line profile variability in lambda Cep

Uuh-Sonda, J. M.; Rauw, Grégor; Eenens, P. et al.

2014 • In Revista Mexicana de Astronomía y Astrofísica, 50, p. 67-76

Peer reviewed

Permalink
https://hdl.handle.net/2268/165240

Files (1)Send to Details Statistics Bibliography Similar publications

Files

Full Text

1401.2875v1.pdf

Author preprint (603.76 kB)

Download

All documents in ORBi are protected by a user license.

Send to

RIS BibTex APA Chicago Permalink X Linkedin

Details

Keywords :

stars: early-type; stars: individual ($\lambda$ Cep); stars: oscillations; stars: variables: general

Abstract :

[en] We present the analysis of a multi-epoch spectroscopic monitoring campaign of the O6 Ief star lambda Cep. Previous observations reported the existence of two modes of non-radial pulsations in this star. Our data reveal a much more complex situation. The frequency content of the power spectrum considerably changes from one epoch to the other. We find no stable frequency that can unambiguously be attributed to pulsations. The epoch-dependence of the frequencies and variability patterns are similar to what is seen in the wind emission lines of this and other Oef stars, suggesting that both phenomena likely have the same, currently still unknown, origin.

Research Center/Unit :

LiSRI - Liège Space Research Institute - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Uuh-Sonda, J. M.; Departamento de Astronomía, Universidad de Guanajuato, Guanajuato, Mexico.)

Rauw, Grégor ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales

Eenens, P.

Mahy, Laurent ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie > Groupe d'astrophysique des hautes énergies

Palate, Matthieu ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales

Gosset, Eric ; Université de Liège - ULiège > GAPHE : Astrophysique observationnelle (sol et espace)

Flores, C. A.

Language :

English

Title :

Epoch-dependent absorption line profile variability in lambda Cep

Publication date :

01 April 2014

Journal title :

Revista Mexicana de Astronomía y Astrofísica

ISSN :

0185-1101

Publisher :

Universidad Nacional Autonoma de Mexico, Mexico

Volume :

Pages :

67-76

Peer reviewed :

Peer reviewed

Additional URL :

http://adsabs.harvard.edu/abs/2014RMxAA..50...67U

Available on ORBi :

since 07 April 2014

Statistics

Number of views

60 (3 by ULiège)

Number of downloads

71 (1 by ULiège)

More statistics

Scopus citations^®

Scopus citations^®
without self-citations

Bibliography

Blomme, R., et al 2011, A & A, 533, A4
Briquet, M., et al 2011, A & A, 527, A112
Conti, P. S., & Frost, S. A. 1974, ApJ, 190, L137
Conti, P. S., & Leep, E. M. 1974, ApJ, 193, 113
De Becker, M., & Rauw, G. 2004, A & A, 427, 995
de Jong, J. A., Henrichs, H. F., Schrijvers, C, and Gies., D. R., Telting, J. H., Kaper, L., & Zwarthoed, G. A. A. 1999, A & A, 345, 172
Fullerton, A. W., and Gies., D. R., & Bolton, C. T. 1996, ApJS, 103, 475
Gies, D. R. 1987, ApJS, 64, 545
Godart, M., Dupret, M.-A., Noels, A., Montalbán, J., & Ventura, P. 2012, in ASP Conf. Proc. 462, Progress in Solar/Stellar Physics with Helio- and Asteroseismology, ed. H. Shibahashi, M. Takata, & A. E. Lynas-Gray (San Francisco: ASP), 27
Gosset, E., Royer, P., Rauw, G., Manfroid, J., & Vreux, J.-M. 2001, MNRAS, 327, 435
Grady, C. A., and Snow., T. P., Jr., & Timothy, J. G. 1983, ApJ, 271, 691
Heck, A., Manfroid, J., & Mersch, G. 1985, A & AS, 59, 63
Henrichs, H. F. 1991, in Proc. ESO Workshop 36, Rapid Variability of OB stars: Nature and Diagnostic Value, ed. D. Baade (Garching: ESO), 199
Henrichs, H. F., Kaper, L., & Zwarthoed, G. A. A. 1988, in ESA Proc. 281, Celebratory Symp. on a Decade of UV Astronomy with the IUE Satellite, Vol. 2, ed. N. Longdon & E. J. Rolfe (Noordwijk: ESA), 145
Henrichs, H. F., & Sudnik, N. P. 2012, 6th Mimes Workshop (CEA: Saclay, France)
-. 2013, IAU Symp. 302, Magnetic fields throughout Stellar Evolution, ed. P. Petit, M. Jardine, & H. Spruit, in press (arXiv:1310.5264)
Kambe, E., et al 1997, ApJ, 481, 406
Kaper, L., and Henrichs., H. F., Nichols, J. S., & Telting, J. H. 1999, A & A, 344, 231
Kaper, L., et al 1997, A & A, 327, 281
Kholtygin, A. F., and Sudnik., N. P., Burlakova, T. E., & Valyavin, G. G. 2011, Astron. Rep., 55, 1105
Kochukhov, O., & Sudnik, N. 2013, A & A, 554, A93
Leep, E. M., & Conti, P. S. 1979, ApJ, 228, 224
Mahy, L., et al 2011, A & A, 525, A101
McCandliss, S. R. 1988, PhD thesis, University of Colorado, Boulder, USA
Rauw, G., De Becker, M., & Vreux, J.-M. 2003, A & A, 399, 287
Rauw, G., et al 2008, A & A, 487, 659
Rivero González, J. G., Puls, J., & Najarro, F. 2011, A & A, 536, A58
Schrijvers, C., & Telting, J. H. 1999, A & A, 342, 453
Stanishev, V., Kraicheva, Z., Boffin, H. M. J., & Genkov, V. 2002, A & A, 394, 625
Telting, J. H., & Schrijvers, C. 1997, A & A, 317, 723
Timmer, J., & König, M. 1995, A & A, 300, 707