The electron temperatures of HII regions S 201, S 206 and S 209 : Multi-frequency GMRT observations

dc.contributor.author	Omar, A
dc.contributor.author	Chengalur, J. N
dc.contributor.author	Roshi, D. A
dc.date.accessioned	2008-07-22T11:24:40Z
dc.date.available	2008-07-22T11:24:40Z
dc.date.issued	2002-09
dc.identifier.citation	BASI, Vol. 30, No. 3, pp. 705 - 706	en
dc.identifier.uri	http://hdl.handle.net/2248/2809
dc.description.abstract	Three Galactic HII regions, viz., S 201, S 206, and S 209 have been imaged at three frequencies, viz., 232, 327, and 610 MHz using the GMRT. The resolutions of these images are typically 15" at 232, 10" at 327, and 6" at 610 MHz. These are the highest resolution low frequency images of these HII regions. We found that all three HII regions have core-envelope morphologies. We use the high resolution afforded by the data to estimate the electron temperatures of the compact cores of these HII regions. These estimates of the electron temperatures are consistent with an increase in the temperature with Ga1acto-centric distance; an effect attributed to a decrease in the heavy elements abundances at large Galacto-centric distances.	en
dc.format.extent	76855 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.subject	HII Regions-ISM	en
dc.subject	Individual-S201, S206, S209	en
dc.subject	Radio Continuum	en
dc.title	The electron temperatures of HII regions S 201, S 206 and S 209 : Multi-frequency GMRT observations	en
dc.type	Article	en