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http://hdl.handle.net/2248/3498
Title: | Identification of the Source Region of a ``Halo'' Coronal Mass Ejection Using Meter-Wavelength Radio Data |
Authors: | Kathiravan, C Ramesh, R |
Keywords: | Sun: Solar-terrestrial Relations Sun: Activity Sun: Corona Sun: Radio Radiation |
Issue Date: | Jul-2005 |
Publisher: | The American Astronomical Society |
Citation: | Astrophysical Journal, Vol. 627, No. 1, Part 2, pp. L77 - L80 |
Abstract: | We present meter-wavelength observations of the solar corona close to the onset of the ``halo'' coronal mass ejection (CME) of 1998 January 21 and estimate the change in electron density with time through a reproduction of the observed two-dimensional radio brightness distribution using a ray-tracing technique. Our calculations show that the average density above the background in the southeast quadrant of the corona overlying the visible solar disk had increased significantly (from 0 to 18), in the aftermath of the CME liftoff. This indicates that the source region of the event must have been located at a lower level of the solar atmosphere in that area. The rate of mass injection corresponding to the above change in density was found to be ~8.8×10/sup15 g hr/sup-1. |
URI: | http://hdl.handle.net/2248/3498 |
ISSN: | 0004-637X |
Appears in Collections: | IIAP Publications |
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File | Description | Size | Format | |
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Identification of the Source Region of a ``Halo'' Coronal Mass Ejection Using Meter-Wavelength Radio Data | 105.49 kB | Adobe PDF | ![]() View/Open |
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