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Surface brightness, standard candles and q/0/The most direct way to determine the deceleration parameter, q(0), of the universe is through the study of the redshift-magnitude relation of extragalactic sources. Progress has been slow because the necessary sources for this study must be standard candles, which have identical absolute total luminosity (balometric or monochromatic). The present paper shows, first of all, that, although necessary, this is not a sufficient condition for nonpoint-like (or resolved) sources. A modification of the redshift-magnitude relation is then described for a certain class of nonstandard candles using measurements of isophotal surface brightness. It is noted that such measurements can be used to standardize the central surface brightness of galaxies, but the standardization of the scale parameter remains beyond observations.
Document ID
19780062304
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Petrosian, V.
(Stanford University Stanford, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Astrophysics
Meeting Information
Meeting: Conference on Redshifts and the expansion of the universe
Location: Paris
Country: France
Start Date: September 6, 1976
End Date: September 7, 1976
Accession Number
78A46213
Distribution Limits
Public
Copyright
Other

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