Brightness temperature and size of the quiet Sun at 34.5 MHz

dc.contributor.author	Subramanian, K. R
dc.date.accessioned	2008-09-11T15:58:18Z
dc.date.available	2008-09-11T15:58:18Z
dc.date.issued	2004-10
dc.identifier.citation	Astronomy and Astrophysics, Vol. 426, No. 1, pp. 329 - 331	en
dc.identifier.issn	0004-6361
dc.identifier.uri	http://hdl.handle.net/2248/3548
dc.description.abstract	We present observations of the quiet Sun made at 34.5 MHz during the solar minimum period June-July 1986 and May-June 1987 with the Gauribidanur radio telescope and a grating array. The brightness temperature of the quiet Sun varied from 1.0 × 10/sup5 K to 4.5 × 10/sup 5 K and the East-West diameter from 39 to 66 arcmin during the above periods. Only a weak inverse correlation is found to exist between the brightness temperature and the diameter of the quiet Sun and it does not strongly support the scattering hypothesis used to explain the low brightness temperature of the quiet Sun at decametric wavelengths.	en
dc.publisher	EDP Sciences	en
dc.relation.uri	http://dx.doi.org/10.1051/0004-6361:20047120	en
dc.subject	Sun: Radio Radiation	en
dc.subject	Sun: Corona	en
dc.subject	Radiation Mechanisms: Thermal	en
dc.subject	Scattering	en
dc.title	Brightness temperature and size of the quiet Sun at 34.5 MHz	en
dc.type	Article	en