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The role of magnetic fields in pre-main sequence stars

Published online by Cambridge University Press:  07 August 2014

Gaitee A. J. Hussain  and
Evelyne Alecian
Gaitee A. J. Hussain
Affiliation:
ESO, Karl-Schwarzschild-Strasse 2, D-85748, Garching bei MünchenGermany email: ghussain@eso.org
Evelyne Alecian
Affiliation:
UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG)UMR 5274, Grenoble, F-38041, France email: evelyne.alecian@obs.ujf-grenoble.fr LESIA, UMR 8109 du CNRS, Observatoire de Paris, UPMC, Université Paris Diderot, 5 place Jules Janssen, F-92195 Meudon Cedex, France
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Abstract

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Strong, kilo-Gauss, magnetic fields are required to explain a range of observational properties in young, accreting pre-main sequence (PMS) systems. We review the techniques used to detect magnetic fields in PMS stars. Key results from a long running campaign aimed at characterising the large scale magnetic fields in accreting T Tauri stars are presented. Maps of surface magnetic flux in these systems can be used to build 3-D models exploring the role of magnetic fields and the efficiency with which magnetic fields can channel accretion from circumstellar disks on to young stars. Long-term variability in T Tauri star magnetic fields strongly point to a dynamo origin of the magnetic fields. Studies are underway to quantify how changes in magnetic fields affect their accretion properties. We also present the first results from a new programme that investigates the evolution of magnetic fields in intermediate mass (1.5–3M⊙) pre-main sequence stars as they evolve from being convective T Tauri stars to fully radiative Herbig AeBe stars.

Keywords

stars: activitystars: accretingstars: circumstellar matterstars: magnetic fields

References

Adams, F. C. & Gregory, S. G. 2012, 744, 55Google Scholar
Alecian, E., Wade, G. A., Catala, C., Grunhut, J. H., Landstreet, J. D., Bagnulo, S., Böhm, T., Folsom, C. P., Marsden, S., & Waite, I. 2013, MNRAS, 429, 1001Google Scholar
Argiroffi, C., Flaccomio, E., Bouvier, J., Donati, J.-F., Getman, K. V., Gregory, S. G., Hussain, G. A. J., Jardine, M. M., Skelly, M. B., & Walter, F. M. 2011, A&A, 530, 1Google Scholar
Barnes, J. R. & Collier Cameron, A. 2001, MNRAS, 326, 950Google Scholar
Behrend, R. & Maeder, A. 2001, A&A, 373, 190Google Scholar
Bouvier, J., Alencar, S. H. P., Boutelier, T., Dougados, C., Balog, Z., Grankin, K., Hodgkin, S. T., Ibrahimov, M. A., Kun, M., Magakian, T. Yu, & Pinte, C. 2007, A&A, 463, 1017Google Scholar
Chen, W. & Johns-Krull, C. M., 2013, ApJ, 776, 113Google Scholar
Donati, J.-F. & Collier Cameron, A. 1997, MNRAS, 291, 1Google Scholar
Donati, J.-F., Semel, M., Carter, B. D., Rees, D. E. & Collier Cameron, A. 1997, MNRAS, 291, 658Google Scholar
Donati, J.-F. & Landstreet, J. D. 2009, ARA&A, 47, 333Google Scholar
Donati, J.-F., Jardine, M. M., Gregory, S. G., et al. 2007, MNRAS, 380, 1297Google Scholar
Donati, J.-F., Jardine, M. M., Gregory, S. G., et al. 2008, MNRAS, 386, 1234Google Scholar
Donati, J.-F., Skelly, M. B., Bouvier, J., et al. 2010a, MNRAS 402, 1426Google Scholar
Donati, J.-F., Skelly, M. B., Bouvier, J., et al. 2010b, MNRAS 409, 1347CrossRefGoogle Scholar
Donati, J.-F., Bouvier, J., Walter, F. M.et al. 2011a, MNRAS, 412, 2454Google Scholar
Donati, J.-F., Gregory, S. G., Alencar, S. H. P., et al. 2011b, MNRAS, 417, 472CrossRefGoogle Scholar
Donati, J.-F., Gregory, S. G., Montmerle, T., et al. 2011c, MNRAS, 417, 1747Google Scholar
Donati, J.-F., Gregory, S. G., Alencar, S. H. P., Hussain, G., Bouvier, J., Dougados, C., Jardine, M. M., Ménard, F., Romanova, M. M.et al. 2012, MNRAS, 425, 2948Google Scholar
Donati, J.-F., Gregory, S. G., Alencar, S. H. P., Hussain, G., Bouvier, J., Jardine, M. M., Ménard, F., Dougados, C., Romanova, M. M., et al. 2013, MNRAS, 436, 881Google Scholar
Gregory, S. G., Donati, J.-F., Morin, J., Hussain, G. A. J., Mayne, N. J., Hillenbrand, L. A., & Jardine, M. 2012, MNRAS, 755, 97Google Scholar
Hartmann, L., MacGregor, K. B. 1982, ApJ, 259, 180Google Scholar
Hussain, G. A. J., Donati, J.-F., Collier Cameron, A., & Barnes, J. R. 2000, MNRAS, 318, 961Google Scholar
Hussain, G. A. J., Collier Cameron, A., Jardine, M. M., Dunstone, N., Ramirez Velez, J., Stempels, H. C., Donati, J.-F., Semel, M., Aulanier, G., Harries, T., Bouvier, J., Dougados, C., Ferreira, J., Carter, B. D., & Lawson, W. A. 2009, MNRAS, 398, 189Google Scholar
Johns-Krull, C. M. 2007, ApJ, 664, 975Google Scholar
Johns-Krull, C. M., 2008, IAUS, 259, 345, Edited by Strassmeier, K. G., Kosovichev, A. G., Beckman, J. E.Google Scholar
Johns-Krull, C. M., Chen, W., Valenti, J. A., Jeffers, S. V., Piskunov, N. E., Kochukhov, O., Makaganiuk, V., Stempels, H. C., Snik, F., Keller, C., & Rodenhuis, M. 2013, ApJ, 765, 11Google Scholar
Johnstone, C. P., Jardine, M., Gregory, S. G., Donati, J.-F., Hussain, G. 2013 MNRAS, in press (arXiv:1310.8194)Google Scholar
Kochukhov, O., Makaganiuk, V., & Piskunov, N. 2010, A&A, 524, 5Google Scholar
Kurosawa, R. & Romanova, M. M. 2013, MNRAS, 431, 2673Google Scholar
Kurosawa, R. & Romanova, M. M. 2012, MNRAS, 426, 2901Google Scholar
Matt, S. & Pudritz, R. E. 2005, ApJ, 632, 135Google Scholar
Matt, S. & Pudritz, R. E. 2008, ApJ, 678, 1109Google Scholar
Morin, J., Dormy, E., Schrinner, M., & Donati, J.-F. 2011, MNRAS, 418, 133Google Scholar
Piskunov, N. E., Tuominen, I., & Vilhu, O. 1990, A&A, 230, 363Google Scholar
Romanova, M. M., Long, M., Lamb, F. K., Kulkarni, A. K., & Donati, J.-F. 2011, MNRAS, 411, 915Google Scholar
Semel, M. 1989, A&A 225, 456Google Scholar
Siess, L., Dufour, E., & Forestini, M. 2000, A&A, 358, 593Google Scholar
Strassmeier, K. G. 2009, A&AR, 17, 251Google Scholar
Tognelli, E., Prada Moroni, P. G., & DeglInnocenti, S. 2011, A&A, 533, 109Google Scholar
Vogt, S. S., Penrod, G. D., & Hatzes, A. P. 1987, 321, 496Google Scholar
Yang, H., Johns-Krull, C. M. & Valenti, J. A. 2008, AJ, 136, 2286Google Scholar
Yang, H. & Johns-Krull, C. M. 2011, ApJ, 729, 83Google Scholar
Zanni, C. & Ferreira, J. 2013, A&A 550, 99Google Scholar