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Cited by 317

The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.

New Insights from [ITAL]HST[/ITAL] Studies of Globular Cluster Systems. I. Colors, Distances, and Specific Frequencies of 28 Elliptical Galaxies

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Kundu, Arunav, Whitmore, Bradley C.·2001·The Astronomical Journal
DOI 10.1086/321073
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Abstract

We present an analysis of the globular cluster systems of 28 elliptical galaxies using archival WFPC2 images in the V and I bands. The V - I color distributions of at least 50% of the galaxies appear to be bimodal at the present level of photometric accuracy . We argue that this is indicative of multiple epochs of cluster formation early in the history of these galaxies, possibly due to mergers. We also present the first evidence of bimodality in low-luminosity galaxies and discuss its implication on formation scenarios. The mean color of the 28 cluster systems studied by us is V - I = 1.04 ± 0.04 (0.01) mag corresponding to a mean metallicity of Fe/H = -1.0 ± 0.19 (0.04). We find that the turnover magnitudes of the globular cluster luminosity functions (GCLF) of our sample are in excellent agreement with the distance measurements using other methods and conclude that the accuracy of the GCLF is at least as good as the surface brightness fluctuation method. The absolute magnitude of the turnover luminosity of the GCLF is M = -7.41 (0.03) in V and M = -8.46 (0.03) in I . The mean local specific frequency of our sample of elliptical galaxies within the WFPC2 field-of-view is 2.4 ± 1.8 (0.4), considerably higher than the 1.0 ± 0.6 (0.1) derived for a comparable sample of S0s in a similar analysis. It shows no obvious correlation with metallicity, host galaxy mass or membership in a galaxy cluster. The median size of clusters in all galaxies appears to be remarkably constant at ∼2.4 pc. We suggest that in the future it might be possible to use the sizes of clusters in the inner regions of galaxies as a simple geometrical distance indicator.

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Metadata

Authors
Kundu, A., & Whitmore, B. C.
Venue
The Astronomical Journal
Publisher
American Astronomical Society
Published
2001-06
Volume
121
Issue
6
Pages
2950-2973
ISSN
0004-6256 (ISSN-L)
DOI
10.1086/321073
OpenAlex
W2012640574
Cited by
317
References
26
FWCI
15.27
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: New Insights from [ITAL]HST[/ITAL] Studies of Globular Cluster Systems. I. Colors, Distances, and Specific Frequencies of 28 Elliptical Galaxies. https://app.cochat.ai/papers/10.1086/321073
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Kundu, A., & Whitmore, B. C. (2001). New Insights from [ITAL]HST[/ITAL] Studies of Globular Cluster Systems. I. Colors, Distances, and Specific Frequencies of 28 Elliptical Galaxies. The Astronomical Journal. https://doi.org/10.1086/321073

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.