Masses of Other Galaxies using HI line observations

In this exercise, you will examine the HI properties, including mass, of several galaxies observed as part of the Arecibo Legacy Fast ALFA (ALFALFA) survey. Observations from this survey are available at the ALFALFA Archive, part of the Cornell Digital HI Archive.


UGC 7849     Alternate spectrum
UGC 8159     Alternate spectrum
UGC 8408     Alternate spectrum
UGC 8573     Alternate spectrum
AGC 215141     Alternate spectrum
AGC 215426     Alternate spectrum
AGC 226056     Alternate spectrum To read further about AGC 226056, check out this press release and the description of ALFALFA observations of Virgo HI21 (this one is more technical).

Last updated Sept 14, 2010