Hostname: page-component-7bb8b95d7b-wpx69 Total loading time: 0 Render date: 2024-10-02T02:26:31.727Z Has data issue: false hasContentIssue false
  • English
  • Français

Rotation and Properties of Be Stars

Published online by Cambridge University Press:  26 May 2016

J. Zorec
J. Zorec*
Affiliation:
Institut d'Astrophysique de Paris, UMR7095/CNRS, 98bis bd. Arago, F-75014 Paris, France (zorec@iap.fr)

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The actual characteristic average surface angular velocity ratio of the Be phenomenon may be higher than Ω/Ωc = 0.8 ± 0.1 derived from v sin i values not corrected from gravity darkening effects. Late Be Stars need not only higher values of Ω/Ωc, but also larger main sequence age ratios τ/τMS than early Be Stars to display the Be phenomenon. Galactic field Be Stars appear at any MS phase, but their frequency is higher for τ/τMS ≳ 0.5. Be Stars are probably neat differential rotators, i.e. they rotate with energy ratios kinetic/|gravitational| larger than withstood by critical rigid rotators. Initial formation conditions must favor the existence of fast rotators, while only a small fraction of them could be accounted for by mass transfer in close binary systems. Bn stars could perhaps represent a pre-Be phase.

Type
Session 1 Observations of Rotating Stars
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004 , pp. 73 - 82
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Abt, H.A. 1987, IAU Coll. No. 92, p. 470 CrossRefGoogle Scholar
Baade, D. 1992, IAU Symp. No. 151, (eds.) Kondo, et al., p. 147 CrossRefGoogle Scholar
Balona, L.A. 1975, MNRAS, 173, 449 CrossRefGoogle Scholar
Balona, L.A. 1990, MNRAS, 245, 92 Google Scholar
Balona, L.A. 1995, MNRAS, 277, 1547 CrossRefGoogle Scholar
Balona, L.A., Henrichs, H.F., & Le Contel, J.M. 1994, In: Pulsation, Rotation and Mass Loss in Early-Type Stars, IAU Symp. No. 162, (eds.) Balona, L. A., Henrichs, H. M., Le Contel, J.F., Kluwer Acad. Publ. CrossRefGoogle Scholar
Berger, D.H., & Gies, D.R. 2001, ApJ, 555, 364 CrossRefGoogle Scholar
Briot, D. 1986, A&A, 163, 67 Google Scholar
Burki, G., & Maeder, A. 1977, A&A, 57, 401 Google Scholar
Chauville, J., Zorec, J., Ballereau, D. et al. 2001, A&A, 378, 861 Google Scholar
Clement, M. 1974, ApJ, 194, 709 CrossRefGoogle Scholar
Coe, M.J. et al. 2000, IAU Coll. No. 175, ASP Conf. Ser. 214, 656 CrossRefGoogle Scholar
Cook, K.H. et al. 1995, IAU Coll. No. 155, ASP Conf. Ser. 83, p. 221 Google Scholar
Collins, G.W. II, & Sonneborn, G.H. 1977, ApJS 34, 41 CrossRefGoogle Scholar
Collins, G.W. II, & Truax, R.J. 1995, ApJ, 439, 860 CrossRefGoogle Scholar
Collins, G.W. II, Truax, R.J., & Cranmer, S.R. 1991, ApJS, 77, 541 CrossRefGoogle Scholar
Cramping, J., & Hoyle, F. 1960, MNRAS, 120, 33 CrossRefGoogle Scholar
Endal, A.S. 1982, IAU Symp. No. 98, p. 299 CrossRefGoogle Scholar
Endal, A.S., & Sofia, S. 1979, ApJ, 232, 531 CrossRefGoogle Scholar
Fabregat, J., & Torrejón, J.M. 2000, A&A, 357, 451 Google Scholar
Fainstein, A. 1990, Rev. Mex. Aston. Astrof. 21, 373 Google Scholar
Fukuda, I. 1982, PASP, 94, 271 CrossRefGoogle Scholar
Floquet, M., Hubert, A.M., Hirata, R. et al. 2000, A&A, 362, 1020 Google Scholar
Frémat, Y., Zorec, J., Levenhagen, R. et al. 2004, In: Stellar Rotation, IAU Symp. No. 215, (eds.) Maeder, A., & Eenens, P., ASP Conf. Ser., this volume Google Scholar
Gies, D.R. 2000, IAU Coll. No. 175, ASP Conf. Ser. Vol. 214, p.Google Scholar
Grebel, E.K. 1997, A&A, 317, 448 Google Scholar
Hardorp, J., & Strittmatter, P.A. 1970, In: Stellar Rotation, (ed.) Slettebak, A., p. 48 CrossRefGoogle Scholar
Harmanec, P. 1987, IAU Coll. No. 92, p. 339 CrossRefGoogle Scholar
Harmanec, P., Bisikalo, D.V., Boyarchuk, A.A. et al. 2003, A&A (in press) Google Scholar
Hanuschik, R.W., Dachs, J., Baudzus, M. et al. 1993, A&A, 274, 356 Google Scholar
Heger, A., & Langer, N. 2000, ApJ, 544, 1016 CrossRefGoogle Scholar
Howarth, I. 2004, In: Stellar Rotation, IAU Symp. 215, (eds.) Maeder, A., & Eenens, P., ASP Conf. Ser., this volume Google Scholar
Hubert, A.M., & Hubert, H. 1979, An Atlas of Be Stars, Paris-Meudon Observatory Google Scholar
Hubert, A.M., Floquet, M. 1998, A&A, 335, 565 Google Scholar
Hubert, A.M., Floquet, M., & Zorec, J. 2000, IAU Coll. 175, p. 348 CrossRefGoogle Scholar
Jaschek, M., & Groth, H.G. 1982, In: Be Stars, IAU Symp. No. 98, (eds.) Jaschek, M., & Groth, H. G., Reidel Publ. Co, Dordrecht-Holland CrossRefGoogle Scholar
Jaschek, M., Slettebak, A., & Jaschek, C. 1981, Be Stars Newsletter No. 4, p.9 CrossRefGoogle Scholar
Keller, S.C., Wood, P.R., & Bessel, M.S. A&AS, 134, 489 Google Scholar
Křiž, S., & Harmanec, P. 1975, Bull. Astron. Inst. Czech. 26, 65 Google Scholar
Lee, U., & Saio, H. 1986, MNRAS, 221, 365 CrossRefGoogle Scholar
Lee, U., & Saio, H. 1987, MNRAS, 225, 643 CrossRefGoogle Scholar
Lyubimkov, L.S., Rostopchin, S.I., Roche, P. et al. 1997, MNRAS, 286, 549 CrossRefGoogle Scholar
Maeder, A., Grebel, E., Mermilliod, J.C. 1999, A&A, 346, 459 Google Scholar
Maeder, A., & Zahn, J.P. 1998, A&A, 334, 1000 Google Scholar
Maintz, M., Rivinius, T., Štefl, S. et al. 2004, In: Stellar Rotation, IAU Symp. 215, (eds.) Maeder, A., & Eenens, P., ASP Conf. Ser., this volume CrossRefGoogle Scholar
Marlborough, J.M. 2000, IAU Coll. No. 175, ASP Conf. Ser. Vol. 214, p. 743 Google Scholar
Massa, D. 1975, PASP, 87, 777 CrossRefGoogle Scholar
Mennickent, R.E., Pietrzynski, G., Gieren, W. et al. 2002, A&A, 393, 887 Google Scholar
Mermilliod, 1982, A&A, 109, 48 Google Scholar
Meynet, G. & Maeder, A. 2000, A&A, 361, 101 Google Scholar
Moujtahid, A., Zorec, J., & Hubert, A.M. 1998, A&AS, 129, 289 Google Scholar
Moujtahid, A., Zorec, J., & Hubert, A.M. 1999, A&A, 349, 151 Google Scholar
Neiner, C. 2002, , University Luis Pasteur, Strasbourg, France Google Scholar
Neiner, C., Hubert, A.M., Floquet, M. et al. 2002, A&A, 388, 899 Google Scholar
Owocki, S.P. 2004, In: Stellar Rotation, IAU Symp. No 215, (eds.) Maeder, A., & Eenens, P., ASP Conf. Ser., this volume Google Scholar
Packet, W. 1981, A&A, 102, 17 Google Scholar
Pigulski, A., & Kopacki, G. 2000, A&AS, 146, 465 Google Scholar
Pigulski, A., Kopacki, G., & Kołaczkowski, Z. 2001, A&A, 376, 144 Google Scholar
Pols, O.R., Coté, J., Waters, L.B.F.M. et al. 1991, A&A, 241, 419 Google Scholar
Rinehart, S.A. 2000, MNRAS, 312, 429 CrossRefGoogle Scholar
Rivinius, T., Baade, D., Štefl, S. et al. 1998, A&A, 336, 177 Google Scholar
Saio, H. 1994, IAU Symp. No. 162, p. 287 CrossRefGoogle Scholar
Schaller, G., Schaerer, D., Meynet, G. et al. 1992, A&AS, 96, 269 Google Scholar
Schild, R., & Romanishin, W. 1976, ApJ, 204, 493 CrossRefGoogle Scholar
Schmidt-Kaler, T. 1964, Veröf. Astr. Inst. Univ. Bonn, No. 70 CrossRefGoogle Scholar
Shobbrook, R.R. 1987, MNRAS, 225, 999 CrossRefGoogle Scholar
Slettebak, A. 1976, In: Be and Shell Stars, IAU Symp. No. 70, (ed.) Slettebak, A., Reidel Publ. Co., Dordrecht-Holland CrossRefGoogle Scholar
Slettebak, A. 1982, ApJS, 50,CrossRefGoogle Scholar
Slettebak, A. 1985, ApJS, 59, 769 CrossRefGoogle Scholar
Slettebak, A., & Snow, T.P. 1987, In: Physics of Be Stars, IAU Coll. No. 92, (eds.) Slettebak, A., & Snow, T. P., Cambridge Univ. Press Google Scholar
Smith, M.A., Henrichs, H.F., & Fabregat, J. 2000, In: The Be Phenomenon in Early-Type Stars, IAU Coll. No. 175, (eds.) Smith, M. A., Henrichs, H. F., Fabregat, J., ASP Conf. Ser. Vol. 214 Google Scholar
Snow, T.P. 1981, ApJ, 251, 139 CrossRefGoogle Scholar
Steele, LA. 1999, A&A, 343, 237 Google Scholar
Stoeckley, T.R. 1968a, MNRAS, 140, 121 CrossRefGoogle Scholar
Stoeckley, T.R. 1968b, MNRAS, 140, 141 CrossRefGoogle Scholar
Stoeckley, T.R., Buscombe, W. 1987, MNRAS, 227, 801 CrossRefGoogle Scholar
Struve, O. 1931, ApJ, 73, 94 CrossRefGoogle Scholar
Struve, O. 1942, Popular Astronomy, 53, 202 Google Scholar
Tarasov, A.E. 2000, IAU Coll. No.175, ASP Conf. Ser. 214, 644 Google Scholar
Tassoul, J.L. 1978, Theory of Rotating Stars, Princeton Univ. Press Google Scholar
Van Bever, J., & Vanbeveren, D. 1997, A&A, 322, 116 Google Scholar
Vardya, V.S. 1985, ApJ, 299, 255 CrossRefGoogle Scholar
Waelkens, C., Lampens, P., Heynderickx, D. et al. 1990, A&AS, 83, 11 Google Scholar
Wegner, W. 2000, MNRAS, 319, 771 CrossRefGoogle Scholar
Wolf, S.C., & Preston, G.W. 1987, ApJS, 37, 371 CrossRefGoogle Scholar
Wolf, S.C., Edwards, S., & Preston, G.W. 1987, ApJ, 252, 322 CrossRefGoogle Scholar
Yudin, R.V. 2001, A&A 368, 912 Google Scholar
Zahn, J.P. 1992, A&A, 265, 115 Google Scholar
Zorec, J. 1998, In: B[e] Stars, Workshop, (eds.) Hubert, A. M. & Jaschek, C., Ap. Sp. Sc. Lib. Vol. 233, p. 27 Google Scholar
Zorec, J., Briot, D. 1991, A&A, 245, 150 Google Scholar
Zorec, J., Briot, D. 1997, A&A, 318, 443 Google Scholar
Zorec, J., Frémat, , & Hubert, A.M. 2000a, IAU Coll. 175, p. 330 CrossRefGoogle Scholar
Zorec, J., Hubert, A.M., & Moujtahid, A. 2000b, IAU Coll. 175, p. 448 CrossRefGoogle Scholar