The Astronomical Journal, Volume 133, Issue 5, pp. 2015-2019.
Bibcode
DOI
Strader, Jay; Beasley, Michael A.; Brodie, Jean P.
Bibliographical reference
Advertised on:
5
2007
Citations
48
Refereed citations
48
Description
Bimodality is a common feature of globular cluster (GC) color
distributions in galaxies. Although it is well known that the GC system
of the Milky Way is bimodal in metallicity, this has yet to be directly
demonstrated for an elliptical galaxy. We use Lick index measurements
from the literature to derive metallicities for 47 GCs in the giant
Virgo elliptical galaxy NGC 4472. The resulting distribution shows clear
evidence for two metallicity subpopulations of GCs.