The 2D Power Spectrum of the Las Campanas Redshift Survey: Excess Power on 100 MPC Scales

Details The 2D Power Spectrum of the Las Campanas Redshift Survey: Excess Power on 100 MPC Scales The 2D Power Spectrum of the Las Campanas Redshift Survey: Excess Power on 100 MPC Scales

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.9402l&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #94.02; Bulletin of the American Astronomical Society, Vol. 27, p.1419

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have measured the 2 dimensional (2D) power spectrum of the Las Campanas Redshift Survey on scales between 30 and 200 Mpc (q_0=0.5, H_o=100h km sec(-1) Mpc(-1) ). We find a strong peak in the power spectrum at ~ 100 Mpc relative to the smooth continuum expected from the best fit Cold Dark Matter model (Prob ~ 2.5x 10(-4) with Omega h = 0.3 assuming a Gaussian random field). This signal is detected in two independent directions on the sky and has been identified with numerous structures visible in the survey which appear as walls and voids. Therefore, we conclude that there exists a significant increase in power on this scale and that such structures are common features in the local universe, z<= 0.2.

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