On the baryon content of the Shapley Supercluster

Details On the baryon content of the Shapley Supercluster On the baryon content of the Shapley Supercluster

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.253p..29f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 253, Dec. 1, 1991, p. 29P, 30P. Research supported by R

Astronomy and Astrophysics

Astronomy

38

Baryons, Galactic Clusters, Galactic Structure, X Ray Astronomy, Gravitational Effects, Hubble Constant, Mass Distribution, Nuclear Fusion

Scientific paper

The relationship between X-ray luminosity and gas mass within 3h50 exp -1 Mpc radius found for nearby clusters is used to show that the ratio of the baryon density to the critical density in the 37h50 exp -1 Mpc core of the Shapley Supercluster is greater than 0.18h50 exp -1.3. This is much greater than the value obtained from published calculations of cosmic nucleosynthesis, Omegab = 0.06h50 exp -2. The high baryon content requires that the supercluster has a total mass overdensity greater than 2.4.

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