Journal
ASTROPHYSICAL JOURNAL
Volume 550, Issue 1, Pages 52-64Publisher
IOP PUBLISHING LTD
DOI: 10.1086/319700
Keywords
galaxies : distances and redshifts; galaxies : statistics; large-scale structure of universe; methods : data analysis
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The combined CfA2/SSRS redshift catalog has recently been improved and made public. We compute the redshift-space power spectrum of this catalog using the regions at -2.5 degrees less than or equal to delta (1950) less than or equal to 50 degrees north (8(h) less than or equal to alpha (1950) less than or equal to 17(h)) and south (20(h) less than or equal to alpha (1950) less than or equal to 3(h), b less than or equal to -13 degrees) of the Galactic plane, where it is 98% complete down to Zwicky magnitude 15.5 and contains 13,681 galaxies. Our analysis uses Heavens-Taylor mode expansion, Karhunen-Loeve data compression, and the Fisher matrix technique to compute quadratic band power estimates. This allows an exact calculation of window functions, including the integral constraint, in addition to the production of a power spectrum with uncorrelated error bars. Our results with this larger data set agree well with those of previous studies. We analyze 101 h(-1) Mpc and 130 h(-1) Mpc volume-limited subsets in addition to the full magnitude-limited sample, and our results are well fitted by, e.g., ACDM models with bias b = 1.2, 1.4, and 1.4, respectively. We estimate the effect of extinction using the Schlegel, Finkbeiner, & Davis dust map. Our results are exclusively for the redshift space galaxy power spectrum, so they can only be compared with theoretical predictions if appropriate corrections are made for biasing and redshift space distortions.
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