On the density of star formation in the universe

Details On the density of star formation in the universe On the density of star formation in the universe

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..435t&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 435-442.

Astronomy and Astrophysics

Astrophysics

29

Cosmology, Galactic Evolution, Spatial Distribution, Star Distribution, Star Formation, Astronomical Models, Hubble Constant, Red Shift, Spiral Galaxies, Star Formation Rate

Scientific paper

The mean star formation rate per unit volume in the universe is estimated, from the distribution of colors of spiral galaxies, to be 0.05 (H0/100)-squared solar mass/yr-cu Mpc. Implications of this star formation density are that the gas within spiral galaxies is being consumed on a time scale of about 0.25 of the Hubble time; stars in the disks of spiral galaxies form on about the Hubble time scale; and the amount of gas associated with galaxies was significantly greater in the recent past; for example, being twice the present value by a redshift of 0.3 and at least 3 times the present value by a redshift of 1.

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