An Estimate ofmwithout Conventional Priors | Zendy

Hume A. Feldman | Zendy; R. Juszkiewicz | Zendy; Pedro G. Ferreira | Zendy; M. Davis | Zendy; E. Gaztaãga | Zendy; J. N. Fry | Zendy; Andrew H. Jaffe | Zendy; Scott W. Chambers | Zendy; L. N. da Costa | Zendy; Mariangela Bernardi | Zendy; Riccardo Giovanelli | Zendy; Martha P. Haynes | Zendy; G. Wegner | Zendy

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An Estimate of_mwithout Conventional Priors

Author(s) -

Hume A. Feldman,

R. Juszkiewicz,

Pedro G. Ferreira,

M. Davis,

E. Gaztaãga,

J. N. Fry,

Andrew H. Jaffe,

Scott W. Chambers,

L. N. da Costa,

Mariangela Bernardi,

Riccardo Giovanelli,

Martha P. Haynes,

G. Wegner

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/379221

Subject(s) - amplitude , physics , prior probability , statistic , peculiar velocity , measure (data warehouse) , statistical physics , galaxy , pairwise comparison , probability density function , astrophysics , tully–fisher relation , statistics , mathematics , bayesian probability , quantum mechanics , redshift , database , computer science , galaxy rotation curve , halo

Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter and the amplitude of density fluctuations j8 Qm . Our results suggest that our statistic is a robust and reproducible measure of the mean pairwise velocity and thereby the parameter. We get and 0.17 Q Q m m p 0.300.07 . These estimates do not depend on prior assumptions on the adiabaticity of the initial density 0.22 j8 p 1.130.23 fluctuations, the ionization history, or the values of other cosmological parameters

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