Max Tegmark's cosmology library: uzc
Figure 1: The CfA/SSRS UZC galaxy redshift survey
Please click here to download a
600K compressed version of the paper, including
the figures above in color (unpack it with "gunzip uzc.ps.gz").
if you are interested in other research of mine.
If you're interested, I'll be happy to put a text file here with
the measured band powers and window functions - just send me an email
if that would be useful to you.
The power spectrum of the CfA/SSRS UZC galaxy redshift survey
The combined CfA2/SSRS redshift catalog has recently been
improved in a number of ways and made public. We compute
the redshift-space power spectrum of this catalog using the
regions at -2.5< delta < 50 north (8h < alpha < 17h) and
south (20h < alpha < 3h, b < -13) 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, as well as the
production of a power spectrum with uncorrelated error bars.
Our results with this larger data set agree well those of
previous studies. We analyze 101 Mpc/h and 130 Mpc/h
volume-limited subsets as well as the full magnitude-limited
sample, and our results are well fit by, e.g., Lambda-CDM
models with sigma8 = 1.2, 1.4 and 1.4, respectively. We
estimate the effect of extinction using the Schlegel,
Finkbeiner and Davis dust map.
submitted to ApJ
This paper makes heavy use of methods describe in more
detail in Tegmark 1997
and Tegmark, Hamilton, Strauss, Vogeley & Szalay 1998.
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This page was last modified November 24, 1999.