Cosmological structure produced by a phase transition near nuclear density

Details Cosmological structure produced by a phase transition near nuclear density Cosmological structure produced by a phase transition near nuclear density

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..418h&link_type=abstract

Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 418-432.

Computer Science

Sound

33

Big Bang Cosmology, Galactic Evolution, Nuclear Fusion, Phase Transformations, Red Shift, Space Density, Density Distribution, Fragments, Gravitational Effects, Microwaves, Relic Radiation, Stellar Evolution

Scientific paper

It is shown that a cold expanding universe naturally produces stars at high redshifts. A homogeneous universe made up of low-entropy matter spontaneously shatters into large pieces as it passes through a period of metastability during a phase transition. It is shown through an approximate theory that the nucleation of rupture by quantum tunneling always produces cracks that are 'large' (much larger than the mean particle separation) when they meet, of the order of 0.001 of the sound horizon length; this gives the size of typical fragments. At nuclear density, matter probably passes through a first-order phase transition as a result of pion condensation or neutron solidification, which produces fragments between approximately 10 to the -10 and 10 to the -6 solar mass at a redshift of about 10 to the 14th. The model makes simple predictions concerning the expected large-scale anisotropy in the microwave background which differ from standard theories postulating fluctuations in the initial state and/or primordial origin for the entropy.

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