Recovering the Initial Power Spectrum of Density Perturbations at Small Scale from LYMAN-α Absorbers

Details Recovering the Initial Power Spectrum of Density Perturbations at Small Scale from LYMAN-α Absorbers Recovering the Initial Power Spectrum of Density Perturbations at Small Scale from LYMAN-α Absorbers

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1593d&link_type=abstract

The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio

Physics

Scientific paper

We present a new method of recovering the power spectrum of initial perturbations to an unprecedently small scale of ~ 10h-1 kpc. We apply this method to a sample of 4500 Ly-α absorbers and recover the cold dark matter (CDM) like power spectrum at scales ≥ 300h-1kpc with a precision of ~ 10%. However at scales ~ 10 - 300h-1kpc the measured and ΛCDM-like spectra are noticeably different.

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