The Globular Cluster System of the dE,N galaxy N3115 DW1

Details The Globular Cluster System of the dE,N galaxy N3115 DW1 The Globular Cluster System of the dE,N galaxy N3115 DW1

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.5205d&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #52.05; Bulletin of the American Astronomical Society, Vol. 26, p.1398

Astronomy and Astrophysics

Astronomy

Scientific paper

A bright (M_V ~ -17) dE,N galaxy near the isolated S0 galaxy NGC 3115 has a surprisingly populous system of globular clusters. We have studied this system using BV CCD photometry from CTIO. A population of ~ 40 clusters is clearly seen above the background out to a distance of ~ 50({') '} ( ~ 2 kpc for d=8 Mpc) from the nucleus. The mean (B-V)_o of the clusters is 0.75+/-0.17, indicating that most (if not all) of the clusters are genuinely old globulars, and not a population of clusters of intermediate or young age. The observed colors then yield a mean [Fe/H] of ~ -1.1, which is more metal-poor (in the mean) than the dwarf itself, implying that the clusters formed during or before the bulk of the galaxy's stellar population. Nevertheless, this is a surprisingly metal-rich cluster system for a dwarf elliptical.

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