ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Spectrum of the type I solar noise storm continuum in the 50 - 80 MHz band and plasma characteristics in the associated source region

Sundaram, Shanmugha GA and Subramanian, KR (2004) Spectrum of the type I solar noise storm continuum in the 50 - 80 MHz band and plasma characteristics in the associated source region. In: Astrophysical Journal, 605 (2). pp. 948-959.

This is the latest version of this item.

[img] PDF
2004ApJ___605__948S.pdf
Restricted to Registered users only

Download (1021Kb) | Request a copy

Abstract

Continuum observations of a solar noise storm in the frequency range of 50–80 MHz observed with the Gauribidanur radio spectrograph during 2000 September 26 and 27 are presented here. The radio spectral index of the noise storm continuum in the 50–80 MHz band is found to be ~3.65 during the above period. The noise storm continuum radiation is explained as a consequence of the nonthermal, plasma emission mechanism. The beam density of suprathermal electrons is estimated for the coronal plasma near the source region of storm radiation. Supplementary evidence for the density estimate is provided by way of analyzing the imaging data from the Soft X-Ray Telescope on board the Yohkoh spacecraft, and the Large Angle and Spectrometric Coronagraph, Michaelson-Doppler Imager, and Extreme-ultraviolet Imaging Telescope on board the SOHO spacecraft.

Item Type: Journal Article
Keywords: plasmas-radiation mechanisms;nonthermal-Sun;radio radiation
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited: 03 May 2005
Last Modified: 19 Sep 2010 04:14
URI: http://eprints.iisc.ernet.in/id/eprint/1043

Available Versions of this Item

Actions (login required)

View Item View Item