Another evolutionary correction to the luminosity of giant galaxies

Details Another evolutionary correction to the luminosity of giant galaxies Another evolutionary correction to the luminosity of giant galaxies

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...202l.113o&link_type=abstract

Astrophysical Journal, vol. 202, Dec. 15, 1975, pt. 2, p. L113-L117.

Mathematics

Logic

259

Cosmology, Galactic Clusters, Galactic Radiation, Stellar Luminosity, Galactic Rotation, Red Shift, Spiral Galaxies, Stellar Evolution, Stellar Mass

Scientific paper

Isolated giant galaxies may accrete their dwarf companions, and those in clusters their neighbors, by the process of dynamic friction. The computed effect is of the opposite sign and similar magnitude to the luminosity change caused by normal stellar evolution. The process, which would cause an increase in the magnitude difference between first- and second-brightest cluster galaxies with time, may be visible in the tabulated data of Sandage and Hardy (1973). Cosmological investigations could compensate for the postulated effect if fainter galaxies were used as well as first-brightest cluster galaxies in the magnitude-redshift test.

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