The phenomenological status of late time phase transition models after cosmic background radiation anisotropy measurements

Details The phenomenological status of late time phase transition models after cosmic background radiation anisotropy measurements The phenomenological status of late time phase transition models after cosmic background radiation anisotropy measurements

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...421..393l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol 421, no. 2, p. 393-399

Astronomy and Astrophysics

Astronomy

4

Anisotropy, Astronomical Models, Background Radiation, Cosmology, Power Spectra, Radiation Measurement, Spaceborne Astronomy, Universe, Astronomical Spectroscopy, Cosmic Background Explorer Satellite, Mathematical Models

Scientific paper

Some relatively model-independent results for structure formation via late time phase transitions (LTPT) are discussed. In particular, generic LTPT power spectra are presented. The implication of the recent Cosmic Background Explorer (COBE) detection of the cosmic background radiation (CBR) anisotropy at large angular scales (greater than or approximately equal to 7 deg) and the tight upper limits from small angular scales (approximately 1 deg) to LTPT models are discussed. Special attention is focused on the observational constraints and possible non-Gaussian signatures of CBR temperature anisotropies from LTPT and other non-Gaussian models. It is shown that while LTPT have been seriously constrained by the recent data, viable models do remain which provide more power on the 100-200 Mpc scales than do more traditional primordial Gaussian density fluctuation models. Tests for such models are presented, including possible anisotropies on angular scales less than 8 min.

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