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Element Stratification in Main Sequence Stars and its Effect on Stellar Oscillations

Published online by Cambridge University Press:  12 April 2016

Sylvie Vauclair
Sylvie Vauclair*
Affiliation:
Laboratoire d’Astrophysique, Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400 Toulouse, France

Abstract

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Element settling due to the combined effects of gravity, thermal gradient, radiative acceleration and concentration gradient may lead to important abundance variations inside the stars that cannot be neglected in the computation of stellar structure. These processes were first introduced to account for abundance anomalies in “peculiar stars”, but their importance in the so-called “normal” stars is now fully acknowledged, specially after the evidence of helium settling in the Sun from helioseismology. These microscopic processes work in competition with macroscopic motions, such as rotation-induced mixing or mass loss, which increase the settling timescales. We have recently obtained clear evidence that asteroseismology of main sequence solar-type stars can give signatures of the chemical variations inside the stars and provide a better understanding of these processes.

Type
Part 7. Chemical composition of variable stars
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 413 - 421
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

Alecian, G., LeBlanc, F. 2000 MNRAS, 319, 677 CrossRefGoogle Scholar
Alecian, G., LeBlanc, F. 2002 MNRAS, 332, 891 CrossRefGoogle Scholar
Alecian, G., Michaud, G., Tully, J. 1993 ApJ, 411,882 CrossRefGoogle Scholar
Aller, L.H., Chapman, S. 1960 ApJ, 132, 461 CrossRefGoogle Scholar
Antia, H.M., Chitre, S.M. 1997 A&A, 339, 239 Google Scholar
Baglin, A. 1972 A&A, 19, 45 Google Scholar
Balachandran, S., Bell, R.A. 1998 Nature, 392, 791 CrossRefGoogle Scholar
Balmforth, N.J., Cunha, M.S., Dolez, N., Gough, D.O., Vauclair, S. 2001 MNRAS, 323, 362 CrossRefGoogle Scholar
Basu, S. 1997 MNRAS, 288, 572 CrossRefGoogle Scholar
Basu, S. 1998 MNRAS, 298, 719 CrossRefGoogle Scholar
Bouchy, F., Carrier, F. 2003 Ap&SS, 284, 21 Google Scholar
Brun, A.S., Turck-Chièze, S., Zahn, J.P. 1999 ApJ, 525, 1032 CrossRefGoogle Scholar
Castro, M. 2003 Masters dissertation “stage de DEA”, Université Paul Sabatier, Toulouse Google Scholar
Charpinet, S., Fontaine, G., Brassard, P., Chayer, P., Rogers, F.J., Iglesias, CA., Dorman, B. 1997 ApJ, 483, L123 CrossRefGoogle Scholar
Dolez, N., Gough, D.O., Vauclair, S. 1988, in Advances in Helio- and Asteroseis-mology, ed. Christensen-Dalsgaard, J. & Frandsen, S., proc. IAU Symp. 123, 291 Google Scholar
Dziembowski, W.A., Goode, P.R. 1996 ApJ, 458, 338 CrossRefGoogle Scholar
Geiss, J., Gloecker, G. 1998 Space Sci. Rev., 84, 239 CrossRefGoogle Scholar
Gelbmann, M., Ryabchikova, T., Weiss, W.W., Piskunov, N., Kupka, F., Mathys, G. 2000 A&A 356, 200 Google Scholar
Gough, D.O. 1990, in “progress of Seismology of the Sun and Stars”, Proceedings of the Oji International Seminar, Hakone, Japan, eds Osaki, Y. and Shibahashi, H. Lect. Notes Phys., 367, 283 Google Scholar
Gough, D.O., Kosovichev, A.G., Toomre, J., et al. 1996 Science, 272, 1296 CrossRefGoogle Scholar
Joshi, S., Girish, V., Sagar, R., Kurtz, D.W., Martinez, P., Seetha, S. 2002 Communications in Asteroseismology, 142, 50 Google Scholar
Kurtz, D.W. 1989 MNRAS 238, 1077 CrossRefGoogle Scholar
Kurtz, D.W. 2000, in Variable stars as essential astrophysical tools, ed. Cafer, Ibanoglu Dordrecht, Boston: Kluwer Academic Publishers, published in cooperation with NATO Scientific Affairs Division, c2000. (NATO science series. Series C, Mathematical and physical sciences, vol. 544, 313 CrossRefGoogle Scholar
Kurtz, D.W., Garrison, R.F., Koen, C., Hoffman, G.F., Viranna, N. 1995 MNRAS 276, 199 Google Scholar
Latour, J., Spiegel, E.A., Toomre, J., Zahn, J.P. 1976 ApJ, 207, 233 CrossRefGoogle Scholar
Martinez, P., Kurtz, D.W., Ashoka, B.N., Chaubey, U.S., Gupta, S.K., Leone, F., Catanzaro, G., Sagar, R., Raj, E., Seetha, S., Kasturirangan, K. 1999 MNRAS, 309, 871 CrossRefGoogle Scholar
Michaud, G. 1970 ApJ 160, 641 CrossRefGoogle Scholar
Michaud, G., Charland, Y., Vauclair, S., Vauclair, G. 1976 ApJ, 210, 445 CrossRefGoogle Scholar
Richard, O., Michaud, G., Richer, J. 2001 ApJ, 558, 377 CrossRefGoogle Scholar
Richard, O., Michaud, G., Richer, J., Turcotte, S., Turck-Chièze, S., Vanden-Berg, D.A. 2002 ApJ, 568, 979 CrossRefGoogle Scholar
Richard, O., Théado, S., Vauclair, S., 2003, submittedGoogle Scholar
Richard, O., Vauclair, S., Charbonnel, C., Dziembowski, W.A., 1996 A&A 312, 1000 Google Scholar
Richer, J., Michaud, G., Rogers, F.J., Iglesias, C.A., Turcotte, S., Leblanc, F. 1998 ApJ 492, 833 CrossRefGoogle Scholar
Richer, J., Michaud, G., Turcotte, S. 2000 ApJ 529, 338 CrossRefGoogle Scholar
Ryabchikova, T., Piskunov, N., Kochukhov, O., Tsymbal, V., Mittermayer, P., Weiss, W.W. 2002 A&A, 384, 545 Google Scholar
Théado, S., Vauclair, S., Castro, M., Charpinet, S., Dolez, N. 2004, in preparationGoogle Scholar
Toomre, J., Zahn, J.P., Latour, J., Spiegel, E.A. 1976 ApJ, 207, 545 CrossRefGoogle Scholar
Turcotte, S., Richer, J., Michaud, G. 1998 ApJ, 504, 559 CrossRefGoogle Scholar
Turcotte, S., Richer, J., Michaud, G., Christensen-Dalsgaard, J. 2000 A&A, 360, 603 Google Scholar
Turcotte, S., Richer, J., Michaud, G., Iglesias, CA., Rogers, F.J. 1998 ApJ, 504, 539 CrossRefGoogle Scholar
Vauclair, S. 1975 A&A, 45, 233 Google Scholar
Vauclair, S., Dolez, N., Gough, D.O. 1991 A&A, 252, 618 Google Scholar
Vauclair, G., Vauclair, S., Michaud, G. 1978a ApJ, 223, 920 CrossRefGoogle Scholar
Vauclair, G., Vauclair, S., Pamjatnikh, A. 1974 A&A, 31, 63 Google Scholar
Vauclair, S., Vauclair, G., Schatzman, E., Michaud, G. 1978b ApJ, 223, 567 CrossRefGoogle Scholar