IIA Institutional Repository

High Angular Resolution Radio Observations of a Coronal Mass Ejection Source Region at Low Frequencies during a Solar Eclipse

Show simple item record

dc.contributor.author Ramesh, R
dc.contributor.author Kathiravan, C
dc.contributor.author Barve, Indrajit V
dc.contributor.author Rajalingam, M
dc.date.accessioned 2011-12-29T16:13:15Z
dc.date.available 2011-12-29T16:13:15Z
dc.date.issued 2012-01-10
dc.identifier.citation The Astrophysical Journal, Vol. 744, No. 2 , 165 en
dc.identifier.uri http://hdl.handle.net/2248/5649
dc.description Open Access en
dc.description.abstract We carried out radio observations of the solar corona in the frequency range 109-50 MHz during the annular eclipse of 2010 January 15 from the Gauribidanur Observatory, located about 100 km north of Bangalore in India. The radio emission in the above frequency range originates typically in the radial distance range ≈1.2-1.5 R ☉ in the "undisturbed" solar atmosphere. Our analysis indicates that (1) the angular size of the smallest observable radio source (associated with a coronal mass ejection in the present case) is ≈1' ± 0farcm3, (2) the source size does not vary with radial distance, (3) the peak brightness temperature of the source corresponding to the above size at a typical frequency like 77 MHz is ≈3 × 109 K, and (4) the coronal magnetic field near the source region is ≈70 mG. en
dc.language.iso en en
dc.publisher IOP Publishing en
dc.relation.uri http://dx.doi.org/10.1088/0004-637X/744/2/165 en
dc.rights © IOP Publishing en
dc.subject Eclipses en
dc.subject Sun: corona en
dc.subject Sun: coronal mass ejections (CMEs) en
dc.subject Sun: magnetic topology en
dc.subject Sun: radio radiation en
dc.subject Techniques: high angular resolution en
dc.title High Angular Resolution Radio Observations of a Coronal Mass Ejection Source Region at Low Frequencies during a Solar Eclipse en
dc.type Article en


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account