Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/4279
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dc.contributor.authorDas, P. K-
dc.contributor.authorSivaram, C-
dc.date.accessioned2009-01-23T14:10:13Z-
dc.date.available2009-01-23T14:10:13Z-
dc.date.issued1988-04-
dc.identifier.citationAstrophysics and Space Science, Vol. 143, No. 2, pp. 249 - 256en
dc.identifier.issn0004-640X-
dc.identifier.urihttp://hdl.handle.net/2248/4279-
dc.description.abstractThe time evolution of galactic luminosity in the framework of the Hoyle-Narlikar (1964, 1974) (HN) cosmology with a variable gravitational constant G is investigated. The luminosity evolution with redshift is studied for both black-body and power-law sources. The G varying HN cosmological models are seen to predict systematically higher luminosities for galaxies at earlier epochs. For thermal black-body sources the increase in infrared K-band luminosity is estimated to be about 1.5 mag for a redshift of z of about 1. Also, the higher temperatures at earlier epochs implied by these models would make the distant galaxies appear bluer. For sources with power-law spectra the magnitude changes are even larger. There is some measure of observational support for the above theoretical predictions.en
dc.language.isoenen
dc.publisherKluwer Academic Publishersen
dc.relation.urihttp://adsabs.harvard.edu/abs/1988Ap%26SS.143..249Den
dc.relation.urihttp://dx.doi.org/10.1007/BF00637139en
dc.subjectAstronomical Modelsen
dc.subjectGravitational Constanten
dc.subjectLuminosityen
dc.subjectRadio Galaxiesen
dc.subjectBlack Body Radiationen
dc.subjectInfrared Spectraen
dc.subjectMagnitudeen
dc.subjectPower Spectraen
dc.subjectRed Shiften
dc.titleLuminosity enhancement of distant radio galaxies and varying G Hoyle-Narlikar cosmologyen
dc.typeArticleen
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