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Radiative Hydrodynamic Simulations of He I 10830 Å

Published online by Cambridge University Press:  18 July 2013

J. X. Cheng ,
M. D. Ding  and
C. Fang
J. X. Cheng
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: chengjx@shao.ac.cn
M. D. Ding
Affiliation:
School of Astronomy & Space Sciences, Nanjing University, Nanjing 210093, China
C. Fang
Affiliation:
School of Astronomy & Space Sciences, Nanjing University, Nanjing 210093, China
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Abstract

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We study the properties of the He I 10830 Å line under the bombardment of nonthermal electron beam. Using radiative hydrodynamics method, we obtain the line profiles from different model atmospheres by varying the electron beam fluxes. Below a certain electron flux, the spectra become much more absorptions as nonthemal flux increases. Above the threshold, the spectral intensities increase as the flux goes up. We also investigate the temporal evolution of the spectra under the nonthermal heating. For weak electron flux, the profiles evolve from weak absorptions to strong absorptions. For strong nonthermal heating, the profiles can be significantly changed from absorptions to emissions. The spectra also show red or blue asymmetries.

Keywords

methods: numericalradiative transfersun: atmospheresun: flares
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 545 - 546
Copyright
Copyright © International Astronomical Union 2013 

References

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