A deep blind HI survey of the nearby spiral rich Ursa Major cluster has been performed with the VLA in parallel with a wide-field R-band imaging campaign of most VLA fields with the CFHT. The goal is to measure the slope of the HI mass function down to HI masses of 10^7 Msun as well as the slope of the faint-end of the luminosity function down to M(R)=-10. The VLA survey sampled 16% of the Ursa Major cluster volume. Both the HIMF and the LF in Ursa Major are nearly flat at their faint-ends. No free- floating HI clouds were detected.
Cite
@article{arxiv.astro-ph/0006122,
title = {The HI mass function in Ursa Major},
author = {Marc Verheijen and Neil Trentham and Brent Tully and Martin Zwaan},
journal= {arXiv preprint arXiv:astro-ph/0006122},
year = {2007}
}
Comments
7 pages, 3 figures. Contribution to the Guanajuato meeting "Mapping the Hidden Universe". To appear in PASP, 2000