Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T02:08:01.670Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetic fields around AGB stars and Planetary Nebulae

Published online by Cambridge University Press:  07 August 2014

W. H. T. Vlemmings
W. H. T. Vlemmings*
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
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.

Stars with a mass up to a few solar masses are one of the main contributors to the enrichment of the interstellar medium in dust and heavy elements. However, while significant progress has been made, the process of the mass-loss responsible for this enrichment is still not exactly known and forces beyond radiation pressure might be required. Often, the mass lost in the last phases of the stars life will become a spectacular planetary nebula. The shaping process of often strongly a-spherical PNe is equally elusive. Both binaries and magnetic fields have been suggested to be possible agents although a combination of both might also be a natural explanation.

Here I review the current evidence for magnetic fields around AGB and post-AGB stars pre-Planetary Nebulae and PNe themselves. Magnetic fields appear to be ubiquitous in the envelopes of apparently single stars, challenging current ideas on its origin, although we have found that binary companions could easily be hidden from view. There are also strong indications of magnetically collimated outflows from post-AGB/pre-PNe objects supporting a significant role in shaping the circumstellar envelope.

Keywords

polarizationmagnetic fieldspolarizationstars-AGB and post-AGBplanetary nebulae
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 389 - 397
Copyright
Copyright © International Astronomical Union 2014 

References

Amiri, N., Vlemmings, W. & van Langevelde, H. J. 2011, A&A, 532, A149Google Scholar
Bains, I., Gledhill, T. M., Yates, J. A., & Richards, A. M. S. 2003, MNRAS, 338, 287CrossRefGoogle Scholar
Bujarrabal, V., Castro-Carrizo, A., Alcolea, J. & Sánchez Contreras, C. 2001, A&A, 377, 868Google Scholar
Chevalier, R. A. & Luo, D. 1994, ApJ, 421, 225CrossRefGoogle Scholar
Falceta-Gonçalves, D. & Jatenco-Pereira, V. 2002, ApJ, 576, 976Google Scholar
Frank, A. & Blackman, E. G. 2004, ApJ, 614, 737CrossRefGoogle Scholar
García-Segura, G., López, J. A., & Franco, J. 2005, ApJ, 618, 919CrossRefGoogle Scholar
Herpin, F., Baudry, A., Thum, C., Morris, D., & Wiesemeyer, H. 2006, A&A, 450, 667Google Scholar
Herpin, F., Baudy, A., Josselin, E., Thum, C., & Wiesemeyer, H. 2009, in IAU Symposium, vol. 259 of IAU Symposium, 47Google Scholar
Kemball, A. J., Diamond, P. J., Gonidakis, I., Mitra, M., Yim, K., Pan, K., & Chiang, H. 2009, ApJ, 698, 1721CrossRefGoogle Scholar
Kwok, S., Purton, C. R., & Fitzgerald, P. M. 1978, ApJ, 219, L125CrossRefGoogle Scholar
Leal-Ferreira, M. L., Vlemmings, W. H. T., Kemball, A., & Amiri, N. 2013, A&A, 554, A134Google Scholar
Leone, F., Martínez González, M. J., Corradi, R. L. M., Privitera, G., & Manso Sainz, R. 2011, ApJL, 731, L33CrossRefGoogle Scholar
Maercker, M., Mohamed, S., Vlemmings, W. H. T., et al. 2012, Nature, 490, 232CrossRefGoogle Scholar
Miranda, L. F., Gómez, Y., Anglada, G., & Torrelles, J. M. 2001, Nature, 414, 284Google Scholar
Nordhaus, J. & Blackman, E. G. 2006, MNRAS, 370, 2004Google Scholar
Nordhaus, J., Blackman, E. G., & Frank, A. 2007, MNRAS, 376, 599CrossRefGoogle Scholar
Pérez-Sánchez, A. F. & Vlemmings, W. H. T. 2013, A&A, 551, A15Google Scholar
Pérez-Sánchez, A. F., Vlemmings, W. H. T., Tafoya, D., & Chapman, J. M. 2013, MNRAS in press, arXiv:1308.5970Google Scholar
Ramstedt, S., Montez, R., Kastner, J., & Vlemmings, W. H. T. 2012, A&A, 543, A147Google Scholar
Rudnitski, G. M., Pashchenko, M. I., & Colom, P. 2010, Astron. Rep., 54, 400CrossRefGoogle Scholar
Sabin, L., Zijlstra, A. A., & Greaves, J. S. 2007, MNRAS, 376, 378CrossRefGoogle Scholar
Soker, N. 1998, MNRAS, 299, 1242Google Scholar
Soker, N. 2002, MNRAS, 336, 826CrossRefGoogle Scholar
Szymczak, M., Cohen, R. J., & Richards, A. M. S. 2001, A&A, 371, 1012Google Scholar
Vlemmings, W. H. T. 2007, in IAU Symposium, edited by Booth, R. S., Humphreys, E. M. L. & Vlemmings, W. H. T., vol. 287 of IAU Symposium, 31Google Scholar
Vlemmings, W. H. T., Diamond, P. J., & Imai, H. 2006, Nature, 440, 58Google Scholar
Vlemmings, W. H. T., Diamond, P. J. & van Langevelde, H. J. 2002, A&A, 394, 589Google Scholar
Vlemmings, W. H. T., Humphreys, E. M. L. & Franco-Hernández, R. 2011, ApJ, 728, 149Google Scholar
Vlemmings, W. H. T., van Langevelde, H. J., & Diamond, P. J. 2005, A&A, 434, 1029Google Scholar
Vlemmings, W. H. T., Ramstedt, S., Rao, R., & Maercker, M. 2012, A&A, 540, L3Google Scholar