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Modeling surface magnetic fields in stars with radiative envelopes

Published online by Cambridge University Press:  07 August 2014

Oleg Kochukhov
Oleg Kochukhov*
Affiliation:
Department of Physics and Astronomy, Uppsala University Box 515, SE-75120 Uppsala, Sweden email: oleg.kochukhov@physics.uu.se
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Abstract

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Stars with radiative envelopes, specifically the upper main sequence chemically peculiar (Ap) stars, were among the first objects outside our solar system for which surface magnetic fields have been detected. Currently magnetic Ap stars remains the only class of stars for which high-resolution measurements of both linear and circular polarization in individual spectral lines are feasible. Consequently, these stars provide unique opportunities to study the physics of polarized radiative transfer in stellar atmospheres, to analyze in detail stellar magnetic field topologies and their relation to starspots, and to test different methodologies of stellar magnetic field mapping. Here I present an overview of different approaches to modeling the surface fields in magnetic A- and B-type stars. In particular, I summarize the ongoing efforts to interpret high-resolution full Stokes vector spectra of these stars using magnetic Doppler imaging. These studies reveal an unexpected complexity of the magnetic field geometries in some Ap stars.

Keywords

stars: magnetic fieldsstars: early-typestars: chemically peculiarpolarization
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 290 - 299
Copyright
Copyright © International Astronomical Union 2014 

References

Abt, H. A. & Morrell, N. I. 1995, ApJS, 99, 135Google Scholar
Alecian, E., Catala, C., Wade, G. A., et al. 2008, MNRAS, 385, 391Google Scholar
Alecian, G. & Stift, M. J. 2010, A&A, 516, A53Google Scholar
Aurière, M., Wade, G. A., Silvester, J., et al. 2007, A&A, 475, 1053Google Scholar
Babcock, H. W. 1947, ApJ, 105, 105Google Scholar
Babcock, H. W. 1958, ApJS, 3, 141Google Scholar
Bagnulo, S., Landi degl'Innocenti, M., & Landi degl'Innocenti, E. 1996, A&A, 308, 115Google Scholar
Bagnulo, S., Landolfi, M., Mathys, G. & Landi Degl'Innocenti, M. 2000, A&A, 358, 929Google Scholar
Bagnulo, S., Wade, G. A., Donati, J.-F., et al. 2001, A&A, 369, 889Google Scholar
Bagnulo, S., Szeifert, T., Wade, G. A., Landstreet, J. D., & Mathys, G. 2002a, A&A, 389, 191Google Scholar
Bagnulo, S., Landi Degl'Innocenti, M., Landolfi, M., & Mathys, G. 2002b, A&A, 394, 1023Google Scholar
Bailey, J. D., Landstreet, J. D., Bagnulo, S., et al. 2011, A&A, 535, A25Google Scholar
Brandenburg, A. 2005, ApJ, 625, 539Google Scholar
Cantiello, M. & Braithwaite, J. 2011, A&A, 534, A140Google Scholar
Donati, J.-F., Howarth, I. D., Jardine, M. M., et al. 2006, MNRAS, 370, 629CrossRefGoogle Scholar
Donati, J.-F. & Landstreet, J. D. 2009, ARA&A, 47, 333Google Scholar
Donati, J.-F., Semel, M., Carter, B. D., Rees, D. E. & Collier Cameron, A. 1997, MNRAS, 291, 658CrossRefGoogle Scholar
Gerth, E., Glagolevskij, Y. V., Hildebrandt, G., Lehmann, H., & Scholz, G. 1999, A&A, 351, 133Google Scholar
Grunhut, J. H., Wade, G. A., Sundqvist, J. O., et al. 2012, MNRAS, 426, 2208CrossRefGoogle Scholar
Kochukhov, O. & Piskunov, N. 2002, A&A, 388, 868Google Scholar
Kochukhov, O., Piskunov, N., Ilyin, I., Ilyina, S., & Tuominen, I. 2002, A&A, 389, 420Google Scholar
Kochukhov, O., Bagnulo, S., Wade, G. A., et al. 2004a, A&A, 414, 613Google Scholar
Kochukhov, O., Drake, N. A., Piskunov, N. & de la Reza, R. 2004b, A&A, 424, 935Google Scholar
Kochukhov, O. 2006, A&A, 454, 321Google Scholar
Kochukhov, O., Tsymbal, V., Ryabchikova, T., Makaganyk, V., & Bagnulo, S. 2006, A&A, 460, 831Google Scholar
Kochukhov, O. & Wade, G. A. 2010, A&A, 513, A13Google Scholar
Kochukhov, O., Makaganiuk, V., & Piskunov, N. 2010, A&A, 524, A5Google Scholar
Kochukhov, O., Lundin, A., Romanyuk, I., & Kudryavtsev, D. 2011, A&A, 726, 24Google Scholar
Kochukhov, O., Wade, G. A., & Shulyak, D. 2012, A&A, 421, 3004Google Scholar
Kochukhov, O. & Sudnik, N. 2013, A&A, 554, A93Google Scholar
Kochukhov, O., Makaganiuk, V., Piskunov, N., et al. 2013, A&A, 554, A61Kochukhov, O. & Sudnik, N. 2013, A&A, 554, A93Google Scholar
Kudryavtsev, D. O., Romanyuk, I. I., Elkin, V. G., & Paunzen, E. 2006, MNRAS, 372, 1804CrossRefGoogle Scholar
Kurtz, D. W. & Martinez, P. 2000, Baltic Astronomy, 9, 253Google Scholar
Landolfi, M., Landi Degl'Innocenti, E., Landi Degl'Innocenti, M., & Leroy, J. L. 1993, A&A, 272, 285Google Scholar
Landstreet, J. D. 1980, AJ, 85, 611Google Scholar
Landstreet, J. D. 1988, ApJ, 326, 967CrossRefGoogle Scholar
Landstreet, J. D. & Mathys, G. 2000, A&A, 359, 213Google Scholar
Lüftinger, T., Kochukhov, O., Ryabchikova, T., et al. 2010, A&A, 509, A71Google Scholar
Mathys, G. 1989, Fundamentals of Cosmic Physics, 13, 143Google Scholar
Mathys, G. & Hubrig, S. 1997, A&AS, 124, 475Google Scholar
Mathys, G., Hubrig, S., Landstreet, J. D., Lanz, T., & Manfroid, J. 1997, A&AS, 123, 353Google Scholar
Monin, D., Bohlender, D., Hardy, T., Saddlemyer, L., & Fletcher, M. 2012, PASP, 124, 329Google Scholar
Nesvacil, N., Lüftinger, T., Shulyak, D., et al. 2012, A&A, 537, A151Google Scholar
Petit, V. & Wade, G. A. 2012, MNRAS, 420, 773Google Scholar
Piskunov, N. & Kochukhov, O. 2002, A&A, 381, 736Google Scholar
Preston, G. W. 1971, ApJ, 164, 309Google Scholar
Rivinius, T., Townsend, R. H. D., Kochukhov, O., et al. 2013, MNRAS, 429, 177Google Scholar
Rosén, L. & Kochukhov, O. 2012, A&A, 548, A8Google Scholar
Rusomarov, N., Kochukhov, O., Piskunov, N., et al. 2013, A&A, 558, A8Google Scholar
Ryabchikova, T., Piskunov, N., Kochukhov, O., et al. 2002, A&A, 384, 545Google Scholar
Shultz, M., Wade, G. A., Grunhut, J., et al. 2012, ApJ, 750, 2CrossRefGoogle Scholar
Silvester, J., Wade, G. A., Kochukhov, O., et al. 2012, MNRAS, 426, 1003Google Scholar
Stibbs, D. W. N. 1950, MNRAS, 110, 395CrossRefGoogle Scholar
Townsend, R. H. D., Owocki, S. P., & Groote, D. 2005, ApJ, 630, L81CrossRefGoogle Scholar
Wade, G. A., Donati, J.-F., Landstreet, J. D., & Shorlin, S. L. S. 2000, MNRAS, 313, 823CrossRefGoogle Scholar