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

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

2007-07-23

arxiv.org/abs/0707.3243v1

Astronomy and Astrophysics

Astrophysics

To appear in proceedings IAU Symp 244, 'Dark Galaxies and Lost Baryons', June 2007, 2 pages including 1 figure

Scientific paper

10.1017/S1743921307014391

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 < RA <11h36m, +8deg < dec < +16deg) 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.

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