The cosmological constant and galaxy formation
نویسندگان
چکیده
منابع مشابه
Cosmological evolution and hierarchical galaxy formation
We calculate the rate at which dark matter halos merge to form higher mass systems. Two complementary derivations using Press-Schechter theory are given, both of which result in the same equation for the formation rate. First, a derivation using the properties of the Brownian random walks within the framework of Press-Schechter theory is presented. We then use Bayes’ theorem to obtain the same ...
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The clustering of galaxies relative to the underlying mass distribution declines with cosmic time for three reasons. First, nonlinear peaks become less rare events as the density field evolves. Second, the densest regions stop forming new galaxies because their gas becomes too hot to cool and collapse. Third, after galaxies form, they are subject to the same gravitational forces as the dark mat...
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A dynamical theory is studied in which a scalar field φ in Einstein-Minkowski space is coupled to the four-velocity Nμ of a preferred inertial observer in that space. As a consistent requirement on this coupling we study a principle of duality invariance of the dynamical mass-term of φ at some universal length in the smalldistance regime. In the large-distance regime duality breaking can be int...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1990
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/242.2.221