Most well-studied, large galaxies reveal two subpopulations of
globular clusters. In the case of early-type galaxies,
bimodality in the globular cluster colour distribution is taken
as evidence of the two subpopulations. For the Milky Way, and to
a lesser extent M31, the subpopulations are distinct in terms of
metallicity and kinematics. The number of galaxies with known
globular cluster bimodality, and hence distinct subpopulations,
has grown rapidly. I have created a web page that lists 40
galaxies with definite or probable bimodality. All colours
(or metallicities) have been converted to a common V-I colour and
corrected for extinction using Schlegel et al. (1998).
As well as mean colour and assigned error for the globular
clusters, I list various galaxy properties and reference
sources. The database can be found at
http://astronomy.swin.edu.au/staff/dforbes/colours.html If this data is to be used for publication I would appreciate
hearing from the authors prior to publication.
I welcome additions to the database.