Imaging of the Merging Galaxy NGC 3597 and its Population of Proto--Globular Clusters

Details Imaging of the Merging Galaxy NGC 3597 and its Population of Proto--Globular Clusters Imaging of the Merging Galaxy NGC 3597 and its Population of Proto--Globular Clusters

1999-10-22

arxiv.org/abs/astro-ph/9910421v1

Astronomy and Astrophysics

Astrophysics

19 pages, Latex, 10 figures, 4 tables, accepted by MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03175.x

We present wide field-of-view near-infrared imaging from the NTT and very deep optical imaging from the HST of the young merging galaxy NGC 3597. The morphology of the galaxy and the properties of the newly formed proto-globular clusters (PGCs) are examined. Our K band data reveals the presence of a second nucleus, which provides further evidence that NGC 3597 is the result of a recent merger. Combining new K band photometry with optical photometry, we are able for the first time to derive a unique age for the newly formed PGCs of a few Myrs. This is consistent with the galaxy starburst age of < 10 Myrs. From deep HST imaging, we are able to probe the luminosity function ~8 magnitudes fainter than normal, old globular clusters, and confirm that the PGCs have a power-law distribution with a slope of ~-2.

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