| Abstract | We present Arecibo neutral hydrogen data on a sample of optically selected dwarf galaxies. The sample ranges in H I mass from 106 to 5×109 Msolar, with a mean of 7.9×108 Msolar. Using estimated H I radii, the H I surface densities range from 0.6 to 20 Msolar pc-2, all well below the critical threshold for star formation (Kennicutt 1998). MH I/L values of the LSB dwarfs range from 0.3 to 12 with a mean value of 2.0. Dynamical masses, calculated from the H I profile widths, range from 108 to 1011 Msolar. There is a strong correlation between optical luminosity and dynamical mass for LSB dwarfs implying that the dark matter (whether baryonic or nonbaryonic) follows the detectable baryonic matter. |
