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Title:
The size and mass of galaxies, and the mass of the universe
Authors:
Ostriker, J. P.; Peebles, P. J. E.; Yahil, A.
Affiliation:
AA(Princeton University, New Observatory, Princeton, N.J.), AB(Princeton University, Princeton, N.J.), AC(Princeton University, New Observatory, Princeton, N.J; Tel Aviv University, Tel Aviv, Israel)
Publication:
Astrophysical Journal, vol. 193, Oct. 1, 1974, pt. 2, p. L1-L4. (ApJL Homepage)
Publication Date:
10/1974
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmology, Size Determination, Spiral Galaxies, Density Distribution, Galactic Structure, Mass, Mass Ratios, Stellar Luminosity
DOI:
10.1086/181617
Bibliographic Code:
1974ApJ...193L...1O

Abstract

Presented arguments are shown to indicate that the mass of spiral galaxies increases almost linearly with radius to nearly 1 Mpc. This means that the total mass per giant spiral is of the order of 10 billion solar masses. A local mean cosmological mass density is determined, whose uncertainty is not less than a factor of 3.

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