High Mass SDSS galaxies in the March 2008 master catalog
During spring break, Riccardo and Martha generated a master catalog of all ALFALFA
detections in the spring sky between 07h30m < R.A. < 16h30m and +04 < Dec < +16 degrees.
Martha has used this catalog to identify Code 1 ALFALFA detections with very high HI masses.
It is not a perfect list at the moment (she dropped a couple that need to be checked) but
let's see what these 39 objects are like. Here are some links:
Martha's notes on Brian's procedure to
crossmatch a catalog with the SDSS.
Note that I have not eliminated any that appear to be interacting, nor have I checked to see
how many have spectra in SDSS. You'll want to compile all of the information (fluxes,
sizes, velocities, equivalent widths etc) that you can find on them and then calculate
their properties: HI mass, optical luminosity, stellar mass,
linear diameter, etc. Some questions to ask:
What is the environment of each? Note whether isolated, in a group,
in a pair, apparently interacting?
What fraction of the ones with SDSS show evidence of AGN? Do any show extraordinary
star formation rates, as if they were starbursts?
Which ones appear to have bars?
Is there any trend of AGN or starburst activity or the presence of a bar
relative to environment?
