Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-25T18:53:38.016Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetic fields in our Galaxy on large and small scales

Published online by Cambridge University Press:  01 March 2007

J. L. Han
J. L. Han*
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Jia-20 DaTun Road, Chaoyang District, Beijing 100012, China email: hjl@bao.ac.cn
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.

Magnetic fields have been observed on all scales in our Galaxy, from AU to kpc. With pulsar dispersion measures and rotation measures, we can directly measure the magnetic fields in a very large region of the Galactic disk. The results show that the large-scale magnetic fields are aligned with the spiral arms but reverse their directions many times from the innermost arm (Norma) to the outer arm (Perseus). The Zeeman splitting measurements of masers in HII regions or star-formation regions not only show the structured fields inside clouds, but also have a clear pattern in the global Galactic distribution of all measured clouds which indicates the possible connection of the large-scale and small-scale magnetic fields.

Keywords

ISM: magnetic fieldspulsars: generalHII regionsradio lines:ISMISM: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 55 - 63
Copyright
Copyright © International Astronomical Union 2008

References

Andreasyan, R. R. & Makarov, A. N. 1989, Afz, 31, 247Google Scholar
Balsara, D. & Kim, J. 2005, ApJ 634, 390CrossRefGoogle Scholar
Beck, R. 2005, In: Magnetic Fields in the Universe: From Laboratory and Stars to Primordial Structures, AIP 784, p.343Google Scholar
Beck, R., Berkhuijsen, E. M., & Bajaja, E., 1991, IAU Sypm. 146, p. 209Google Scholar
Beck, R., Brandenburg, A., Moss, D., Shukurov, A. M., & Sokoloff, D. D., 1996, ARA&A, 34, 155Google Scholar
Boulares, A. & Cox, D. 1990, ApJ, 365, 544CrossRefGoogle Scholar
Brown, J. C., Taylor, A. R., & Jackel, B. J. 2003, ApJS, 145, 213CrossRefGoogle Scholar
Brown, J. C., Haverkorn, M., Gaensler, B. M. et al. , & 2007, ApJ, in pressGoogle Scholar
Chuss, D. T., Davidson, J. A., Dotson, J. L. et al. , & 2003, ApJ, 599, 1116CrossRefGoogle Scholar
Clegg, A. W., Cordes, J. M., Simonetti, J. M., Kulkarni, S. R. 1992, ApJ, 386, 143Google Scholar
Crutcher, R. M. 1999, ApJ, 520, 706CrossRefGoogle Scholar
Crutcher, R. M. 2007, IAU Symp.242, this volumn.Google Scholar
Crutcher, R. M., Nutter, D. J., Ward-Thompson, D., & Kirk, J. M. 2004, ApJ, 600, 279CrossRefGoogle Scholar
Duncan, A. R., Haynes, R. F., Jones, K. L., & Stewart, R. T. 1997, MNRAS, 291, 279Google Scholar
Duncan, A. R., Haynes, R. F., Reich, W., Reich, P., & Gray, A. D. 1998, MNRAS, 299, 942CrossRefGoogle Scholar
Duncan, A. R., Reich, P., Reich, W., & Fürst, E. 1999, A&A, 350, 447Google Scholar
Fish, V. L., Reid, M. J., Agron, A. L. & Menten, K. M., 2003, ApJ, 596, 328CrossRefGoogle Scholar
Gaensler, B. M. 1998, ApJ, 493, 781CrossRefGoogle Scholar
Gaensler, B. M., Dickey, J. M., McClure-Griffiths, N. M. et al. , & 2001, ApJ, 549, 959CrossRefGoogle Scholar
Hamilton, P. A. & Lyne, A. G. 1987, MNRAS, 224, 1073CrossRefGoogle Scholar
Han, J. L. & Qiao, G. J. 1994, A&A, 288, 759Google Scholar
Han, J. L., Ferriere, K., & Manchester, R. N. 2004, ApJ, 610, 820CrossRefGoogle Scholar
Han, J. L., Manchester, R. N., Berkhuijsen, E. M., & Beck, R. 1997, A&A, 322, 98Google Scholar
Han, J. L., Manchester, R. N., & Qiao, G. J. 1999, MNRAS, 306, 371Google Scholar
Han, J. L., Manchester, R. N., Lyne, A. G., & Qiao, G. J. 2002, ApJ, 570, L17CrossRefGoogle Scholar
Han, J. L., Manchester, R. N., Lyne, A. G., Qiao, G. J., & vanStraten, W. Straten, W. 2006, ApJ, 642, 868.CrossRefGoogle Scholar
Han, J. L., & Zhang, J. S. 2007, A&A, 464, 609Google Scholar
Haverkorn, M., Gaensler, B. M., Brown, J. C. et al. , 2006, ApJ 637, L33CrossRefGoogle Scholar
Heiles, C. 1996a, ApJ, 462, 316Google Scholar
Heiles, C. 1996b, in ASP Conf. Ser. 97: Polarimetry of the Interstellar Medium, 457Google Scholar
Heiles, C, & Crutcher, R. 2005, In: Cosmic Magnetic Fields, LNP 664, 137Google Scholar
Haynes, R. F., Stewart, R. T., Gray, A. D. et al. , & 1992, A&A, 264, 500Google Scholar
Hutawarakorn, B. & Cohen, R. J., 2005, MNRAS, 357, 338CrossRefGoogle Scholar
Indrani, C. & Deshpande, A. A. 1999, New Astronomy, 4, 33CrossRefGoogle Scholar
Junkes, N., Fürst, E., & Reich, W. 1987, A&AS, 69, 451Google Scholar
LaRosa, T. N., Nord, M. E., Lazio, T. J. W., & Kassim, N. E. 2004, ApJ, 607, 302CrossRefGoogle Scholar
LaRosa, T. N., Brogan, C. L., Shore, S. N. et al. , 2005, ApJ, 626, L23CrossRefGoogle Scholar
Li, H., Griffin, G. S., Krejny, M. et al. , & 2006, ApJ, 648, 340CrossRefGoogle Scholar
Lyne, A. G. & Smith, F. G. 1989, MNRAS, 237, 533CrossRefGoogle Scholar
Mathewson, D. S. & Ford, V. L. 1970a, MemRAS, 74, 139.Google Scholar
Minter, A. H. & Spangler, S. R. 1996, ApJ, 458, 194CrossRefGoogle Scholar
Morris, M., Uchida, K.,& Do, T. 2006, Nature, 440, 308CrossRefGoogle Scholar
Nord, M. E., Lazio, T. J. W., Kassim, N. E. et al. , 2004, AJ, 128, 1646CrossRefGoogle Scholar
Novak, G., Chuss, D. T., Renbarger, T. et al. , & 2003, ApJ, 583, L83CrossRefGoogle Scholar
Prouza, M. & Smída, R. 2003, A&A 410, 1Google Scholar
Qiao, G. J., Manchester, R. N., Lyne, A. G., & Gould, D. M. 1995, MNRAS, 274, 572Google Scholar
Rand, R. J. & Kulkarni, S. R. 1989, ApJ, 343, 760Google Scholar
Reich, W. 2007, in: Cosmic Polarization, (astro-ph/0603465), p. 91Google Scholar
Reich, W., Fürst, E., Reich, P. et al. , 2002, in AIP Conf. Proc. 609: p. 3Google Scholar
Roy, S., Rao, A. P., Subrahmanyan, R. 2005, MNRAS 360, 1305CrossRefGoogle Scholar
Simard-Normandin, M. & Kronberg, P. P. 1980, ApJ, 242, 74CrossRefGoogle Scholar
Sun, X. H. & Han, J. L. 2004, in: Magnetized Interstellar Medium, p. 25Google Scholar
Sun, X. H., Han, J. L., Reich, W. et al. , & 2007, A&A 463, 993Google Scholar
Tinyakov, P. G. & Tkachev, I. I. 2002, Astropart. Ph. 18, 165CrossRefGoogle Scholar
Vlemming, W. 2007, IAU Symp. 242, this volumeGoogle Scholar
Weisberg, J. M., Cordes, J. M. et al. , Kuan, 2004, ApJS, 150, 317CrossRefGoogle Scholar
Xu, J. W., Han, J. L., Reich, W. et al. , & 2007, A&A, in pressGoogle Scholar
Yusef-Zadeh, F., & Morris, M. 1987, ApJ, 320, 545CrossRefGoogle Scholar
Yusef-Zadeh, F., Hewitt, J. M., & Cotton, W. 2004, ApJS, 155, 421CrossRefGoogle Scholar