ALFALFA in the Leo Region: Looking for Missing Satellites in HI
Abstract
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.
- Publication:
-
Dark Galaxies and Lost Baryons
- Pub Date:
- May 2008
- DOI:
- arXiv:
- arXiv:0707.3243
- Bibcode:
- 2008IAUS..244..385S
- Keywords:
-
- galaxies: distances and redshifts;
- galaxies: dwarf;
- galaxies: evolution;
- galaxies: formation;
- galaxies: mass function;
- galaxies: spiral;
- (cosmology:) cosmological parameters;
- cosmology: observations;
- (cosmology:) large-scale structure of universe;
- radio lines: galaxies;
- Astrophysics
- E-Print:
- To appear in proceedings IAU Symp 244, 'Dark Galaxies and Lost Baryons', June 2007, 2 pages including 1 figure