Cosmological Parameter Determination from Counts of Galaxies | Zendy

Silviu Podariu | Zendy; Bharat Ratra | Zendy

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Cosmological Parameter Determination from Counts of Galaxies

Author(s) -

Silviu Podariu,

Bharat Ratra

Publication year - 2001

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 - 10.1086/323698

Subject(s) - physics , galaxy , omega , sigma , cosmological constant , lambda , redshift , astrophysics , constant (computer programming) , variable (mathematics) , statistical physics , theoretical physics , astronomy , quantum mechanics , mathematics , mathematical analysis , computer science , programming language

We study constraints that anticipated DEEP survey galaxy counts versusredshift data will place on cosmological model parameters in models with andwithout a constant or time-variable cosmological constant $\Lambda$. This datawill result in fairly tight constraints on these parameters. For example, ifall other parameters of a spatially-flat model with a constant $\Lambda$ areknown, the galaxy counts data should constrain the nonrelativistic matterdensity parameter $\Omega_0$ to about 5% (10%, 1.5%) at 1 $\sigma$ with neutral(worst case, best case) assumptions about data quality.Comment: 15 pages, 6 figure

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