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The Distribution of ALFALFA Galaxies

Published online by Cambridge University Press:  01 June 2007

Ann M. Martin*
Affiliation:
Department of Astronomy, Cornell University, Ithaca, NY 14853, USA email: [email protected]
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Abstract

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The ALFALFA2 blind HI survey will enable a census of the distribution of gas-rich galaxies in the local Universe. Sensitive to an HI mass of 107 solar masses at the distance of the Virgo cluster, ALFALFA will probe the smallest objects locally and provide a new consideration of near-field cosmology. Additionally, with a larger, cosmologically significant sample volume and wider bandwidth than previous blind surveys, a much larger number of detections in each mass bin is possible, with adequate angular resolution to eliminate the need for extensive follow-up observations. This increased sensitivity will greatly enhance the utility of cosmological probes in HI. ALFALFA will eventually measure the correlation function of HI selected galaxies in a large local volume. The larger sample and volume size of the ALFALFA dataset will also robustly measure the HI mass function (HIMF). Here, we present the preliminary results on the distribution of local gas-rich galaxies from a first ALFALFA catalog covering 540 deg2.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

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