Reference : Kepler observations of the variability in B-type stars
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/108368
Kepler observations of the variability in B-type stars
English
Balona, L. A. [South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa]
Pigulski, A. [Instytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, 51-622 Wrocław, Poland]
Cat, P De [Koninklijke Sterrenwacht van België, Ringlaan 3, B-1180 Brussels, Belgium]
Handler, G. [Institut für Astronomie, Universität Wien, Vienna, Austria]
Gutiérrez-Soto, J. [Instituto de Astrofísica de Andalucía, CSIC, PO Box 3004, 18080 Granada, Spain; LESIA, Observatoire de Paris, CNRS, UPMC, Université Paris-Diderot, 92195 Meudon, France]
Engelbrecht, C. A. [Department of Physics, University of Johannesburg, South Africa]
Frescura, F. [School of Physics, University of the Witwatersrand, Johannesburg, South Africa]
Briquet, Maryline mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie]
Cuypers, J. [Koninklijke Sterrenwacht van België, Ringlaan 3, B-1180 Brussels, Belgium]
Daszyńska-Daszkiewicz, J. [Instytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, 51-622 Wrocław, Poland]
Degroote, P. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium]
Dukes, R. J. [Department of Physics and Astronomy, The College of Charleston, Charleston, SC 29424, USA]
Garcia, R. A. [ > > ]
Green, E. M. [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA]
Heber, U. [Dr. Karl Remeis-Observatory & ECAP, Astronomical Inst., FAU Erlangen-Nuremberg, Sternwartstr. 7, 96049 Bamberg, Germany]
Kawaler, S. D. [Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA]
Lehmann, H. [Thüringer Landessternwarte, Tautenburg, Germany]
Leroy, B. [ > > ]
Molenda-Żaaowicz, J. [Instytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, 51-622 Wrocław, Poland]
Neiner, C. [LESIA, Observatoire de Paris, CNRS, UPMC, Université Paris-Diderot, 92195 Meudon, France]
Noels-Grötsch, Arlette mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Nuspl, J. [Queen Mary University of London, Mile End Road, London E1 4NS]
Østensen, R. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium]
Pricopi, D. [Astronomical Institute of the Romanian Academy, Bucharest, Romania]
Roxburgh, I. [Queen Mary University of London, Mile End Road, London E1 4NS]
Salmon, Sébastien mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Smith, M. A. [Space Telescope Science Institute, Baltimore, MD 21218, USA]
Suárez, J. C. [Instituto de Astrofísica de Andalucía, CSIC, PO Box 3004, 18080 Granada, Spain]
Suran, M. [Astronomical Institute of the Romanian Academy, Bucharest, Romania]
Szabó, R. [Konkoly Observatory of the Hungarian Academy of Sciences, Budapest, Hungary]
Uytterhoeven, K. [Laboratoire AIM, CEA/DSM-CNRS-Université Paris Diderot; IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette, France]
Christensen-Dalsgaard, J. [Department of Physics and Astronomy, Building 1520, Aarhus University, 8000 Aarhus C, Denmark]
Kjeldsen, H. [Department of Physics and Astronomy, Building 1520, Aarhus University, 8000 Aarhus C, Denmark]
Caldwell, D. A. [SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA]
Girouard, F. R. [Orbital Sciences Corporation/NASA Ames Research Center, Moffett Field, CA 94035, USA]
Sanderfer, D. T. [NASA Ames Research Center, Moffett Field, CA 94035, USA]
1-Jun-2011
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
413
2403-2420
Yes (verified by ORBi)
International
0035-8711
Oxford
United Kingdom
[en] stars: early-type ; stars: oscillations
[en] The analysis of the light curves of 48 B-type stars observed by Kepler is presented. Among these are 15 pulsating stars, all of which show low frequencies, characteristic of slowly pulsating B (SPB) stars. Seven of these stars also show a few weak, isolated high frequencies and they could be considered as SPB/β Cephei (β Cep) hybrids. In all cases, the frequency spectra are quite different from what is seen from ground-based observations. We suggest that this is because most of the low frequencies are modes of high degree which are predicted to be unstable in models of mid-B stars. We find that there are non-pulsating stars within the β Cep and SPB instability strips. Apart from the pulsating stars, we can identify stars with frequency groupings similar to what is seen in Be stars but which are not Be stars. The origin of the groupings is not clear, but may be related to rotation. We find periodic variations in other stars which we attribute to proximity effects in binary systems or possibly rotational modulation. We find no evidence for pulsating stars between the cool edge of the SPB and the hot edge of the δ Sct instability strips. None of the stars shows the broad features which can be attributed to stochastically excited modes as recently proposed. Among our sample of B stars are two chemically peculiar stars, one of which is a HgMn star showing rotational modulation in the light curve.
Researchers ; Students
http://hdl.handle.net/2268/108368
10.1111/j.1365-2966.2011.18311.x
http://adsabs.harvard.edu/abs/2011MNRAS.413.2403B
http://de.arxiv.org/abs/1103.0644

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
j.1365-2966.2011.18311.x.pdfPublisher postprint25.04 MBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.