Gauge Invariant Cosmological Perturbations with Cold Dark Matter

Details Gauge Invariant Cosmological Perturbations with Cold Dark Matter Gauge Invariant Cosmological Perturbations with Cold Dark Matter

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pthph..81.1021s&link_type=abstract

Progress of Theoretical Physics, Vol. 81, No. 5, pp. 1021-1036

Physics

18

Scientific paper

In the gauge-invariant formalism, the evolution of adiabatic and baryonic isocurvature density perturbations in a universe dominated by cold dark matter (CDM) is throughly investigated. We evaluate anisotropies in the cosmic microwave background (CMB) and large scale peculiar velocities. From the recent observations of CMB fluctuations, we find new and stringent constraint is obtained for adiabatic CDM models as Omega0h(-1) > 0.3. As for baryonic isocurvature perturbations, though the constraint is required as Omega0h(-1) gtrsim 0.6, we find these baryonic isocurvature models are more viable than axion isocurvature models. However it is difficult for both adiabatic and baryonic isocurvature CDM models to explain the observed large scale velocity field at gtrsim 50 h(-1) Mpc while being consistent with the observations of CMB anisotropies.

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