Hostname: page-component-5c6d5d7d68-xq9c7 Total loading time: 0 Render date: 2024-08-19T14:53:17.723Z Has data issue: false hasContentIssue false
  • English
  • Français

Multi-line techniques for inference of stellar magnetic fields

Published online by Cambridge University Press:  24 July 2015

Oleg Kochukhov
Oleg Kochukhov*
Affiliation:
Department of Physics and Astronomy, Uppsala University, Uppsala 75120, Sweden email: oleg.kochukhov@physics.uu.se
Rights & Permissions [Opens in a new window]

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.

Spectropolarimetric studies of stellar magnetic fields usually deal with extremely weak line polarisation signatures. The amplitudes of Stokes signals, even in magnetically sensitive spectral lines, are often well below the noise level realistically achievable with the current instrumentation. Consequently, a detection of these polarisation signatures and their meaningful analysis is impossible without combining information from multiple spectral lines. Here I review basic theoretical foundations of the multi-line spectropolarimetric diagnostic methods employed in stellar magnetometry, give examples of their application, and discuss recent efforts to interpret mean polarisation profiles with the help of detailed radiative transfer calculations.

Keywords

Polarisationradiative transferstars: activitystars: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S305: Polarimetry: From the Sun to Stars and Stellar Environments , December 2014 , pp. 216 - 224
Copyright
Copyright © International Astronomical Union 2015 

References

Alecian, E., Wade, G. A., Catala, C., et al. 2009, MNRAS 400, 354 CrossRefGoogle Scholar
Anderson, R. I., Reiners, A., & Solanki, S. K. 2010, A&A 522, A81 Google Scholar
Bagnulo, S., Landolfi, M., Mathys, G., et al. 2000, A&A 358, 929 Google Scholar
Bagnulo, S., Wade, G. A., Donati, J.-F., et al. 2001, A&A 369, 889 Google Scholar
Bagnulo, S., Landi Degl'Innocenti, M., Landolfi, M., et al. 2002, A&A 394, 1023 Google Scholar
Carroll, T. A., Strassmeier, K. G., Rice, J. B., et al. 2012, A&A 548, A95 Google Scholar
Donati, J.-F., Semel, M., Carter, B. D., et al. 1997, MNRAS 291, 658 CrossRefGoogle Scholar
Donati, J.-F., Cameron, A. C., Semel, M., et al. 2003, MNRAS 345, 1145 CrossRefGoogle Scholar
Donati, J.-F. & Landstreet, J. D. 2009, ARA&A 47, 333 Google Scholar
Donati, J.-F., Skelly, M. B., Bouvier, J., et al. 2010, MNRAS 409, 1347 CrossRefGoogle Scholar
Folsom, C. P., Kochukhov, O., Wade, G. A., et al. 2010, MNRAS 407, 2383 CrossRefGoogle Scholar
Johns-Krull, C. M. 2007, ApJ 664, 975 CrossRefGoogle Scholar
Johns-Krull, C. M. & Valenti, J. A. 1996, ApJ 459, L95 CrossRefGoogle Scholar
Kochukhov, O., Makaganiuk, V., & Piskunov, N. 2010, A&A 524, 5 Google Scholar
Kochukhov, O., Makaganiuk, V., Piskunov, N., et al. 2013, A&A 554, A61 Google Scholar
Kochukhov, O., Lüftinger, T., Neiner, C., et al. 2014, A&A 565, 83 Google Scholar
Landstreet, J. D. & Mathys, G. 2000, A&A 359, 213 Google Scholar
Lignières, F., Petit, P., Böhm, T., et al. 2009, A&A 500, L41 Google Scholar
Martínez González, M. J., Asensio Ramos, A., Carroll, T. A., et al. 2008, A&A 486, 637 Google Scholar
Mathys, G. 1989, Fundamentals of Cosmic Physics 13, 143 Google Scholar
Mathys, G. 1991, A&AS 89, 121 Google Scholar
Mathys, G. 1995a, A&A 293, 733 Google Scholar
Mathys, G. 1995b, A&A 293, 746 Google Scholar
Mathys, G., Hubrig, S., Landstreet, J. D., et al. 1997, A&AS 123, 353 Google Scholar
Mathys, G. & Hubrig, S. 2006, A&A 453, 699 Google Scholar
Mestel, L. 1999, Stellar magnetism, Clarendon, Oxford Google Scholar
Morin, J., Donati, J.-F., Petit, P., et al. 2008, MNRAS 390, 567 CrossRefGoogle Scholar
Petit, P., Dintrans, B., Solanki, S. K., et al. 2008, MNRAS 388, 80 CrossRefGoogle Scholar
Reiners, A. & Basri, G. 2007, ApJ 656, 1121 CrossRefGoogle Scholar
Rosén, L., Kochukhov, O., & Wade, G. A. 2013, MNRAS 436, L10 CrossRefGoogle Scholar
Rosén, L., Kochukhov, O., & Wade, G. A. 2015, ApJ submittedGoogle Scholar
Rusomarov, N., Kochukhov, O., Piskunov, N., et al. 2013, A&A 558, A8 Google Scholar
Sennhauser, C., Berdyugina, S. V., & Fluri, D. M. 2009, A&A 507, 1711 Google Scholar
Silvester, J., Wade, G. A., Kochukhov, O., et al. 2012, MNRAS 426, 1003 CrossRefGoogle Scholar
Shultz, M., Wade, G. A., Grunhut, J., et al. 2012, ApJ 750, 2 CrossRefGoogle Scholar
Wade, G. A., Donati, J.-F., Landstreet, J. D., et al. 2000, MNRAS 313, 823 CrossRefGoogle Scholar