Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T17:35:58.007Z Has data issue: false hasContentIssue false
  • English
  • Français

Quasi-Periodic Oscillations in magnetars: linking variability and emission

Published online by Cambridge University Press:  20 March 2013

Caroline D'Angelo
Caroline D'Angelo*
Affiliation:
Instituut Anton Pannekoek, University of Amsterdam, Amsterdam, Netherlands1098 XH email: [email protected]
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.

I present recent results studying flare emission in magnetars. Strong quasi-periodic oscillations observed in the tail of giant magnetar flares are frequently interpreted as evidence for global seismic oscillations. I demonstrate that such a global oscillation is not directly observable in the lightcurve. New work suggests the amplitude for the strongest QPO stays nearly constant in the rotation phases where it is observed, which I argue suggests it is produced by an additional emission process from the star.

Keywords

dense matterradiation mechanisms: generalmagnetic fields (magnetohydrodynamics:) MHDstars: neutronstars: oscillationsX-rays: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 155 - 158
Copyright
Copyright © International Astronomical Union 2013

References

D'Angelo, C. R. & Watts, A. L. 2012, ApJL, 751, L41Google Scholar
Duncan, R. C. 1998, ApJL, 498, L45Google Scholar
Gabler, M., Cerdá Durán, P., Font, J. A., Müller, E., & Stergioulas, N. 2011, MNRAS, 410, L37Google Scholar
Glampedakis, K., Samuelsson, L., & Andersson, N. 2006, MNRAS, 371, L74Google Scholar
Israel, G. L., Belloni, T., Stella, L., et al. 2005, ApJL, 628, L53Google Scholar
Levin, Y. 2006, MNRAS, 368, L35Google Scholar
Nakariakov, V. M. & Melnikov, V. F. 2009, Space Sci. Rev., 149, 119Google Scholar
Nakariakov, V. M. & Melnikov, V. F. 2006, ApJ, 653, 593Google Scholar
Thompson, C. & Duncan, R. C. 1995, MNRAS, 275, 255CrossRefGoogle Scholar
Timokhin, A. N., Eichler, D., & Lyubarsky, Y. 2008, ApJ, 680, 1398Google Scholar
van der Klis, M. 1989, in Timing Neutron Stars, ed. Ögelman, H. & van den Heuvel, E. P. J., 27Google Scholar
Vaughan, S. 2005, A&A, 431, 391Google Scholar
Vaughan, S. 2010, MNRAS, 402, 307Google Scholar
Watts, A. L. & Strohmayer, T. E. 2006, ApJL, 637, L117Google Scholar