Estimating the Power Spectrum Using QSO Absorbers

Details Estimating the Power Spectrum Using QSO Absorbers Estimating the Power Spectrum Using QSO Absorbers

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...19111207q&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #112.07; Bulletin of the American Astronomical Society, Vol. 29, p.1395

Astronomy and Astrophysics

Astronomy

Scientific paper

I present first results on estimating the power spectrum P(k) of density fluctuations on very large scales - larger than several tens of comoving Mpc - using an extensive catalog of heavy-element QSO absorption-line systems. The size and extent of the absorber catalog - with over 2200 absorbers listed over 500 QSOs - permits exploration of the power spectrum over a large range in scale (from about 1 to over 100 Mpc) and redshift (z from about 1 to 4). I also discuss statistical issues in estimating P(k) from such a sample.

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