[en] We have gathered and analyzed 1493 high-quality multicolor Geneva photometric data taken over 21 years of the B3V star HD 129929. We detect six frequencies, among which appear the effects of rotational splitting with a spacing of ~0.0121 cycles per day, which implies that the star rotates very slowly. A nonadiabatic analysis of the oscillations allows us to constrain the metallicity of the star to Z â [0.017,0.022], which agrees with a similar range derived from spectroscopic data. We provide evidence for the occurrence of core convective overshooting in the star, with alpha[SUB]ov[/SUB] = 0.10 +/- 0.05, and we rule out rigid rotation.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Aerts, C.; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Leuven, Belgium.
Thoul, Anne ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA)
Daszynska, J.; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Leuven, Belgium. ; Astronomical Institute of the Wroclaw University, ul. Kopernika 11, 51-622 Wroclaw, Poland.
Scuflaire, Richard ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA)
Waelkens, C.; Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Leuven, Belgium.
Dupret, Marc-Antoine ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique
Niemczura, E.; Astronomical Institute of the Wroclaw University, ul. Kopernika 11, 51-622 Wroclaw, Poland.
Noels-Grötsch, Arlette ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
Asteroseismology of HD 129929: Core Overshooting and Nonrigid Rotation
Publication date :
01 June 2003
Journal title :
Science
ISSN :
0036-8075
eISSN :
1095-9203
Publisher :
American Association for the Advancement of Science, Washington, United States - District of Columbia
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We are indebted to all the researchers from Leuven and Geneva who contributed to the gathering of the data over the course of 21 years. C.A. and C.W. acknowledge financial support from the Fund for Scientific Research of Flanders (FWO). A.T., R.S., M.A.D., and A.N. acknowledge financial support from the Interuniversity Attraction Pole (IAP, Belgium), from Programme de Développement d'Experiences Scientifiques (PRODEX) of the European Space Agency, and from the Fonds pour la Formation à ta Recherche dans l'Industrie et dans l'Agriculture (FRIA, Belgium). A.T. acknowledges financial support from the Fonds National de la Recherche Scientifique (FNRS. Belgium). J.D. acknowledges financial support from the Belgian Federal Office for Scientific, Technical, and Cultural Affairs (OSTC, Belgium).
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