Radio wave heating of astrophysical plasmas |
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| Authors: | R T Gangadhara V Krishan |
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| Institution: | (1) Indian Institute of Astrophysics, 560034 Bangalore;(2) Joint Astronomy programme, Department of Physics, Indian Institute of Science, 560012 Bangalore |
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| Abstract: | The coherent plasma process such as parametric decay instability (PDI) has been applied to a homogeneous and unmagnetized
plasma. These instabilities cause anomalous absorption of strong electromagnetic radiation under specific conditions of energy
and momentum conservation and thus cause anomalous heating of the plasma. The maximum plasma temperatures reached are functions
of luminosity of the radio radiation and plasma parameters. We believe that these processes may be taking place in many astrophysical
objects. Here, the conditions in the sources 3C 273, 3C 48 and Crab Nebula are shown to be conducive to the excitation of
PDI. These processes also contribute towards the absorption of 21cm radiation |
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| Keywords: | plasma parametric instability quasar Crab Nebula anomalous absorption electromagnetic waves |
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