CP and related phenomena in the context of Stellar Evolution

被引:4
作者
Braithwaite, J. [1 ,2 ]
Akguen, T. [3 ]
Alecian, E. [4 ]
Kholtygin, A. F. [5 ]
Landstreet, D. [6 ,7 ]
Mathis, S. [8 ]
Michaud, G. [9 ]
Portnoy, J. [10 ]
Alecian, G. [4 ]
Bychkov, V. D. [11 ]
Bychkova, L. V. [11 ]
Drake, N. [5 ]
Fabrika, S. N. [11 ]
Reisenegger, A. [3 ]
Steinitz, R. [12 ]
Vick, M. [9 ]
机构
[1] Canadian Inst Theoret Astrophys, Toronto, ON, Canada
[2] Argelander Inst Astron, Bonn, Germany
[3] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago, Chile
[4] Observ Paris, LESIA, F-92190 Meudon, France
[5] St Petersburg State Univ, Dept Astron, St Petersburg, Russia
[6] Univ Western Ontario, London, ON N6A 3K7, Canada
[7] Armagh Observ, Armagh, North Ireland
[8] CEA DSM CNRS Univ Paris Diderot, IRFU SAp Ctr Saclay, Lab AIM, F-91191 Gif Sur Yvette, France
[9] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada
[10] Sami Shamoon Coll Engn, Beer Sheva, Israel
[11] Special Astrophys Observ, Karachay Cherkessia, Russia
[12] Ben Gurion Univ Negev, Dept Phys, Beer Sheva, Israel
来源
HIGHLIGHTS OF ASTRONOMY, VOL 15 | 2010年 / 15卷
关键词
stars: magnetic fields; stars: chemically peculiar; stars: evolution; (magnetohydrodynamics) MHD; stars: rotation; stars: intermediate mass; stars: pre-main sequence; HORIZONTAL-BRANCH STARS; MAGNETIC-FIELDS; ROTATING STARS; DIFFERENTIAL ROTATION; RADIATION ZONES; MERIDIONAL CIRCULATION; ABUNDANCE ANOMALIES; ADIABATIC STABILITY; ATOMIC DIFFUSION; TOROIDAL FIELDS;
D O I
10.1017/S1743921310008562
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We review the interaction in intermediate and high mass stars between their evolution and magnetic and chemical properties. We describe the theory of Ap-star 'fossil' fields, before touching on the expected secular diffusive processes which give rise to evolution of the field. We then present recent results from a spectropolarimetric survey of Herbig Ae/Be stars, showing that magnetic fields of the kind seen on the main-sequence already exist during the pre-main sequence phase, in agreement with fossil field theory, and that the origin of the slow rotation of Ap/Bp stars also lies early in the pre-main sequence evolution; we also present results confirming a lack of stars with fields below a. few hundred gauss. We then seek which macroscopic motions compete with atomic diffusion in determining the surface abundances of AmFm stars. While turbulent transport and mass loss, in competition with atomic diffusion, are both able to explain observed surface abundances, the interior abundance distribution is different enough to potentially lead to a test using asterosismology. Finally we review progress on the turbulence-driving and mixing processes in stellar radiative zones.
引用
收藏
页码:161 / +
页数:3
相关论文
共 47 条
  • [1] Characterization of the magnetic field of the Herbig Be star HD 200775
    Alecian, E.
    Catala, C.
    Wade, G. A.
    Donati, J. -F.
    Petit, P.
    Landstreet, J. D.
    Bohm, T.
    Bouret, J. -C.
    Bagnulo, S.
    Folsom, C.
    Grunhut, J.
    Silvester, J.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 385 (01) : 391 - 403
  • [2] Magnetism and binarity of the Herbig Ae star V380 Ori
    Alecian, E.
    Wade, G. A.
    Catala, C.
    Bagnulo, S.
    Boehm, T.
    Bouret, J. -C.
    Donati, J. -F.
    Folsom, C. P.
    Grunhut, J.
    Landstreet, J. D.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 400 (01) : 354 - 368
  • [3] Weak magnetic fields in Ap/Bp stars - Evidence for a dipole field lower limit and a tentative interpretation of the magnetic dichotomy
    Auriere, M.
    Wade, G. A.
    Silvester, J.
    Lignieres, F.
    Bagnulo, S.
    Bale, K.
    Dintrans, B.
    Donati, J. F.
    Folsom, C. P.
    Gruberbauer, M.
    Hoa, A. Hui Bon
    Jeffers, S.
    Johnson, N.
    Landstreet, J. D.
    Lebre, A.
    Lueftinger, T.
    Marsden, S.
    Mouillet, D.
    Naseri, S.
    Paletou, F.
    Petit, P.
    Power, J.
    Rincon, F.
    Strasser, S.
    Toque, N.
    [J]. ASTRONOMY & ASTROPHYSICS, 2007, 475 (03) : 1053 - U111
  • [4] BABEL J, 1997, TEXTITA A, V323, P121
  • [5] AN ENERGY PRINCIPLE FOR HYDROMAGNETIC STABILITY PROBLEMS
    BERNSTEIN, IB
    FRIEMAN, EA
    KRUSKAL, MD
    KULSRUD, RM
    [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1958, 244 (1236): : 17 - 40
  • [6] The weak magnetic field of the O9.7 supergiant ζ Orionis A
    Bouret, J-C.
    Donati, J-F.
    Martins, F.
    Escolano, C.
    Marcolino, W.
    Lanz, T.
    Howarth, I. D.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 389 (01) : 75 - 85
  • [7] RR Lyrae stars in the inner Large Magellanic Cloud: halo-like location with a disk-like distribution
    Subramaniam, A
    [J]. ASTRONOMY & ASTROPHYSICS, 2006, 449 (01): : 101 - 108
  • [8] A fossil origin for the magnetic field in A stars and white dwarfs
    Braithwaite, J
    Spruit, HC
    [J]. NATURE, 2004, 431 (7010) : 819 - 821
  • [9] On non-axisymmetric magnetic equilibria in stars
    Braithwaite, Jonathan
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 386 (04) : 1947 - 1958
  • [10] Axisymmetric magnetic fields in stars: relative strengths of poloidal and toroidal components
    Braithwaite, Jonathan
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 397 (02) : 763 - 774