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ALFALFA in the Leo Region: Looking for Missing Satellites in HI

Published online by Cambridge University Press:  01 June 2007

Sabrina Stierwalt
Sabrina Stierwalt*
Affiliation:
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, email: sabrina@astro.cornell.edu
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Abstract

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The location of two nearby galaxy groups within ~20 Mpc in the Leo region allows for a detailed study of low-mass galaxies. A catalog of HI line detections in Leo (9h36m < α < 11h36m, +8° < δ < +16°) has been made from the blind HI survey ALFALFA. More sensitive single-pixel Arecibo observations targeted Leo dwarf candidates noted optically by Karachentsev et al. 2004 (K04) to determine group members and allow for a comparison of HI and optically-selected samples. This presentation highlights the differences between the two samples and the significant contribution blind HI surveys can make to the missing satellites problem.

Keywords

galaxies: distances and redshiftsgalaxies: dwarfgalaxies: evolutiongalaxies: formationgalaxies: mass functiongalaxies: spiral(cosmology:) cosmological parameterscosmology: observations(cosmology:) large-scale structure of universeradio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 385 - 386
Copyright
Copyright © International Astronomical Union 2008

References

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