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http://hdl.handle.net/2248/4279
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DC Field | Value | Language |
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dc.contributor.author | Das, P. K | - |
dc.contributor.author | Sivaram, C | - |
dc.date.accessioned | 2009-01-23T14:10:13Z | - |
dc.date.available | 2009-01-23T14:10:13Z | - |
dc.date.issued | 1988-04 | - |
dc.identifier.citation | Astrophysics and Space Science, Vol. 143, No. 2, pp. 249 - 256 | en |
dc.identifier.issn | 0004-640X | - |
dc.identifier.uri | http://hdl.handle.net/2248/4279 | - |
dc.description.abstract | The 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.iso | en | en |
dc.publisher | Kluwer Academic Publishers | en |
dc.relation.uri | http://adsabs.harvard.edu/abs/1988Ap%26SS.143..249D | en |
dc.relation.uri | http://dx.doi.org/10.1007/BF00637139 | en |
dc.subject | Astronomical Models | en |
dc.subject | Gravitational Constant | en |
dc.subject | Luminosity | en |
dc.subject | Radio Galaxies | en |
dc.subject | Black Body Radiation | en |
dc.subject | Infrared Spectra | en |
dc.subject | Magnitude | en |
dc.subject | Power Spectra | en |
dc.subject | Red Shift | en |
dc.title | Luminosity enhancement of distant radio galaxies and varying G Hoyle-Narlikar cosmology | en |
dc.type | Article | en |
Appears in Collections: | IIAP Publications |
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File | Description | Size | Format | |
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Luminosity enhancement of distant radio galaxies | 534.7 kB | Adobe PDF | View/Open |
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