Vol. 53, No. 6
December 1999
pp. 971–975

Constraining cosmological parameters through
Sunyaev-Zel¢dovich surveys

SUBHABRATA MAJUMDAR^1,2 and RAVI SUBRAHMANYAN^3,4

1 Joint Astrophysics Programme, Department of Physics, Indian Institute of Science,
Bangalore 560 012, India
² Indian Institute of Astrophysics, Koramangala, Bangalore 560 034, India
³ Australia Telescope National Facility, CSIRO, Locked bag 194, Narrabri, NSW 2390, Australia
⁴ Raman Research Institute, Sadashivanagar, Bangalore 560 080, India

Abstract.

For cold dark matter models, images of temperature fluctuations in the cosmic microwave background (CMB), due to Sunyaev Zel¢dovich (SZ) effect have been been simulated taking a cosmolgical distribution of clusters into account. All the models are normalised to the 4-year COBE data. The image statistics are compared with the ATCA limits on arcmin scale anisotropy. The comparison appears to favour low-W₀ open universe models.

Keywords Cosmic microwave background; clusters; cosmology theory; cosmology observations.

Pacs 98.65.Cw; 98.65.Dx; 98.70.Vc

| back | | View/Download pdf file |