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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4234
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dc.contributor.authorKapahi, V.K.-
dc.contributor.authorSubrahmanya, C.R.-
dc.contributor.authorKulkarni, V.K.-
dc.date.accessioned2011-12-15T06:00:15Z-
dc.date.available2011-12-15T06:00:15Z-
dc.date.issued1987-03-
dc.identifier.citationJournal of Astrophysics and Astronomy, 1987, Vol. 8, p33en
dc.identifier.issn0250-6335-
dc.identifier.issn0973-7758 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/4234-
dc.descriptionRestricted Access.en
dc.description.abstractThe interpretation of the observed relation between median angular sizes (thetam) of extragalactic radio sources and flux density at 408 MHz has been examined. The predicted thetam-S relations based on well-observed strong sources in parent samples selected at 178 and 1400 MHz, and existing models of the evolving radio luminosity function, can be made to fit the observed relation only by invoking cosmological evolution in linear sizes even for the q(0) = 0 universe. Predictions based on a parent sample at 2.7 GHz are shown to overestimate the contribution of steep-spectrum, compact (SSC) sources in low-frequency samples unless the downward curvature in the spectra of such sources is taken into account. When approximate corrections are made for this effect, predictions based on the 2.7 GHz parent sample cannot obviate the need for linear size evolution as claimed in the literature.en
dc.language.isoenen
dc.publisherIndian Academy of Sciences, Bangaloreen
dc.relation.urihttp://adsabs.harvard.edu/abs/1987JApA....8...33Ken
dc.relation.urihttp://dx.doi.org/10.1007/BF02714250en
dc.rights1987 Indian Academy of Sciences, Bangalore, Indiaen
dc.subjectCosmologyen
dc.subjectExtragalactic Radio Sourcesen
dc.subjectRadiant Flux Densityen
dc.subjectLuminosityen
dc.subjectRed Shiften
dc.subjectSize Distributionen
dc.titleOn the interpretation of the observed angular-size-flux-density relation for extragalactic radio sourcesen
dc.typeArticleen
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