dc.contributor.author |
Majumdar, S |
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dc.date.accessioned |
2008-07-29T04:53:29Z |
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dc.date.available |
2008-07-29T04:53:29Z |
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dc.date.issued |
2001-07 |
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dc.identifier.citation |
Astrophysical Journal, Vol. 555, No. 1, Part 2, pp. L7 - L10 |
en |
dc.identifier.issn |
0004-637X |
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dc.identifier.uri |
http://hdl.handle.net/2248/2930 |
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dc.description.abstract |
Study of the primary anisotropies of the cosmic microwave background (CMB) can be used to determine the cosmological parameters to a very high precision. The power spectrum of the secondary CMB anisotropies due to the thermal Sunyaev-Zeldovich effect (SZE) by clusters of galaxies can then be studied, to constrain more cluster-specific properties (like gas mass). We show the SZE power spectrum from clusters to be a sensitive probe of any possible evolution (or constancy) of the gas mass fraction. The position of the peak of the SZE power spectrum is a strong discriminatory signature of different gas mass fraction evolution models. For example, for a flat universe, there can be a difference in the l-values (of the peak) of as much as 2500 between a constant gas mass fraction model and an evolutionary one. Moreover, observational determination of the power spectrum, from blank-sky surveys, is devoid of any selection effects that can possibly affect targeted X-ray or radio studies of gas mass fractions in galaxy clusters. |
en |
dc.format.extent |
93208 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
en |
dc.publisher |
American Astronomical Society |
en |
dc.relation.uri |
http://www.journals.uchicago.edu/doi/abs/10.1086/323159 |
en |
dc.subject |
Cosmology: Cosmic Microwave Background |
en |
dc.subject |
Cosmology: Observations, |
en |
dc.subject |
Cosmology: Theory |
en |
dc.subject |
Galaxies: Clusters: General |
en |
dc.title |
Probing the Evolution of the Gas Mass Fraction with the Sunyaev-Zeldovich Effect |
en |
dc.type |
Article |
en |