SIMBAD references

1999A&A...346..721C - Astronomy and Astrophysics, volume 346, 721-730 (1999/6-3)

The globular cluster system around the low-luminosity S0 galaxy NGC 7457.


Abstract (from CDS):

We investigate the globular cluster system around the low-luminosity S0 galaxy NGC 7457 with deep B, V, I photometry. From the V photometry the total number of globular clusters around the galaxy is estimated to be 178±75. The specific frequency is estimated to be SN=2.7±1.1 adopting MV=-19.55mag for the galaxy. We select 89 globular cluster candidates on the basis of their colors (B-I, V-I and B-V). The B-I and V-I color distributions are found unimodal with a mean metallicity [Fe/H]~-1dex. Nevertheless the width of the B-I color distribution is found larger than that expected for a single population of globular clusters and is consistent with the presence of more than one population. If the latter is the case, the two peaks would not be detected in B-I because of the small statistics and/or a small difference in the mean metallicity of the two populations. No metal poor globular clusters similar to those of the Milky Way halo are detected around NGC 7457.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 7457 - galaxies: star clusters

Simbad objects: 11

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