Low-frequency Observations of Transient Quasi-periodic Radio Emission from the Solar Atmosphere

dc.contributor.author	Sasikumar Raja, K
dc.contributor.author	Ramesh, R
dc.date.accessioned	2013-09-12T13:28:16Z
dc.date.available	2013-09-12T13:28:16Z
dc.date.issued	2013-09-20
dc.identifier.citation	The Astrophysical Journal, Vol. 775, No. 1, 38
dc.identifier.uri	http://hdl.handle.net/2248/6336
dc.description	Restricted Access	en
dc.description.abstract	We report low-frequency observations of quasi-periodic, circularly polarized, harmonic type III radio bursts whose associated sunspot active regions were located close to the solar limb. The measured periodicity of the bursts at 80 MHz was ≈5.2 s, and their average degree of circular polarization (dcp) was ≈0.12. We calculated the associated magnetic field B (1) using the empirical relationship between the dcp and B for the harmonic type III emission, and (2) from the observed quasi-periodicity of the bursts. Both the methods result in B ≈ 4.2 G at the location of the 80 MHz plasma level (radial distance r ≈ 1.3 R ☉) in the active region corona.	en
dc.language.iso	en	en
dc.publisher	IOP Publishing
dc.relation.uri	http://dx.doi.org/10.1088/0004-637X/775/1/38
dc.rights	© IOP Publishing	en
dc.subject	Sun: corona	en
dc.subject	Sun: magnetic fields	en
dc.subject	Sun: oscillations	en
dc.subject	Sun: radio radiation	en
dc.title	Low-frequency Observations of Transient Quasi-periodic Radio Emission from the Solar Atmosphere	en
dc.type	Article	en