Surface brightness parameters as tests of galactic evolution

Abstract

view Abstract Citations (2) References (8) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Surface brightness parameters as tests of galactic evolution. Tinsley, B. M. Abstract It is shown that surface-brightness parameters defined in terms of an isophotal radius are insensitive to galactic evolution, because the effects of luminosity evolution on the flux and isophotal radius almost cancel each other. Surface-brightness parameters that are defined in terms of a metric radius are able to give fairly direct information on evolution, but only if the metric scale of each galaxy in the sample is determined by photometry of the galaxy itself. If, instead, a metric radius is estimated by means of a fiducial value of the deceleration parameter, the brightness-redshift relation yields only a function of both evolution and the unknown cosmological model, which is very similar to the function obtained from the Hubble diagram. Publication: The Astrophysical Journal Pub Date: October 1976 DOI: 10.1086/182254 Bibcode: 1976ApJ...209L...7T Keywords: Galactic Evolution; Luminous Intensity; Red Shift; Surface Properties; Astronomical Models; Astronomical Photometry; Cosmology; Elliptical Galaxies; Hubble Diagram; Astrophysics full text sources ADS | data products NED (8)