Density evolution of radio sources fuelled by stellar mass loss

Details Density evolution of radio sources fuelled by stellar mass loss Density evolution of radio sources fuelled by stellar mass loss

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.289..659b&link_type=abstract

Nature, vol. 289, Feb. 19, 1981, p. 659-661. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astronomy

6

Density (Mass/Volume), Radio Galaxies, Radio Sources (Astronomy), Stellar Mass Ejection, Elliptical Galaxies, Luminous Intensity, Supernovae

Scientific paper

At early cosmological epochs the comoving density of radio sources was very much higher than it is at present. A theory for the evolution of the comoving density of radio sources is outlined, based on the hypothesis that mass loss from stars flows inwards in massive galaxies to fuel nuclear activity. A sufficient condition for the occurrence of inflow is used to show that the critical galaxy mass above which a total outflow becomes impossible decreases towards earlier epochs. It is assumed that the comoving density of radio sources is proportional to the comoving density of galaxies with inflow. The predicted density evolution of the radiogalaxy phenomenon is in good agreement with observations.

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