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Radiative hydrodynamic simulations of acoustic waves in sunspots

Published online by Cambridge University Press:  14 March 2005

S. Bard  and
M. Carlsson
S. Bard
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, P.O. box 1029 Blindern, N-0315 Oslo, NORWAY
M. Carlsson
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, P.O. box 1029 Blindern, N-0315 Oslo, NORWAY
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Abstract

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We describe fully consistent NLTE radiation hydrodynamic simulations of the propagation of acoustic waves in sunspot umbrae. In contrast to the case of the quiet internetwork Sun, we find that the observed behavior of the resonance lines of singly ionized calcium (H and K lines) cannot be explained without adding non-acoustic heating. The best agreement with observations is obtained with an extra heating term as a function of height that is constant per volume.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 445 - 446
Copyright
© 2004 International Astronomical Union