Cosmological Implications of Galaxy Clusters in X-Ray, Millimeter, and Submillimeter Bands

Details Cosmological Implications of Galaxy Clusters in X-Ray, Millimeter, and Submillimeter Bands Cosmological Implications of Galaxy Clusters in X-Ray, Millimeter, and Submillimeter Bands

1999-02-25

arxiv.org/abs/astro-ph/9902350v1

Adv.Space Res. 25 (2000) 771-780

Astronomy and Astrophysics

Astrophysics

10 pages, Advances in Space Research, in press (proceedings of the 32nd COSPAR meeting)

Scientific paper

10.1016/S0273-1177(99)00838-8

Cosmological implications of clusters of galaxies are discussed with particular attention to their importance in probing the cosmological parameters. More specifically we compute the number counts of clusters of galaxies, Log $N$ -- Log $S$ relation, in X-ray and submm bands on the basis of the Press--Schechter theory. As an important step toward breaking the degeneracy among the viable cosmological models, we observed the most luminous X-ray cluster RXJ1347-1145 in three bands (21 and 43 GHz in the Nobeyama Radio Observatory, Japan, and 350 GHz in the J. C. Maxwell telescope at Mauna Kea, Hawaii). We report on the preliminary results which are in good agreement with the profile of the Sunayev -- Zel'dovich effect predicted on the basis of the previous X-ray observation of the cluster.

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