Clustering of H I galaxies in the H I Parkes All Sky Survey and Arecibo Legacy Fast ALFA Survey

Details Clustering of H I galaxies in the H I Parkes All Sky Survey and Arecibo Legacy Fast ALFA Survey Clustering of H I galaxies in the H I Parkes All Sky Survey and Arecibo Legacy Fast ALFA Survey

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.412l..50p&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 412, Issue 1, pp. L50-L54.

Astronomy and Astrophysics

Astronomy

1

Large-Scale Structure Of Universe, Radio Lines: Galaxies

Scientific paper

We investigate the clustering of H I-selected galaxies in the Arecibo Legacy Fast ALFA Survey (ALFALFA) and compare results with those obtained for the H I Parkes All Sky Survey (HIPASS). Measurements of the angular correlation function and the inferred 3D clustering are compared with results from direct spatial-correlation measurements. We are able to measure clustering on smaller angular scales and for galaxies with lower H I masses than was previously possible. We calculate the expected clustering of dark matter using the redshift distributions of the HIPASS and ALFALFA, and show that the ALFALFA sample is somewhat more antibiased with respect to dark matter than the HIPASS sample.

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