Expansion of radio galaxies in a cosmologically evolving medium: possible implications for the cosmic star-formation history

dc.contributor.author	Barai, P
dc.contributor.author	Gopal-Krishna
dc.contributor.author	Osterman, M. A
dc.contributor.author	Wiita, P. J
dc.date.accessioned	2006-03-13T11:23:14Z
dc.date.available	2006-03-13T11:23:14Z
dc.date.issued	2004-12
dc.identifier.citation	BASI, Vol. 32, No. 4, pp. 385-394	en
dc.identifier.uri	http://hdl.handle.net/2248/746
dc.description.abstract	We compare earlier estimates of the volumes filed by lobes of radio galaxies during the quasar era based upon non-evolving ambient media with new ones assuming a strong cosmological evolution of the ambient medium. If the sources remain active for over 108 years the volumes filed by them are found to be comparable for the two scenarios. This strengthens our earlier inference that much of the cosmic web of gaseous fiaments, the site of galaxy formation, was probably permeated by radio lobes during the quasar era and this could have triggered extensive star formation and made large contributions to the spread of magnetic filds and metals through the universe by z~2	en
dc.format.extent	172500 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.subject	galaxies: active - galaxies	en
dc.subject	jets - quasars	en
dc.subject	general - radio continuum	en
dc.subject	galaxies - stars: formation	en
dc.title	Expansion of radio galaxies in a cosmologically evolving medium: possible implications for the cosmic star-formation history	en
dc.type	Article	en