Nuclear Brightness Profiles of Merger Remnants: Constraints on the Formation of Ellipticals by Mergers

Details Nuclear Brightness Profiles of Merger Remnants: Constraints on the Formation of Ellipticals by Mergers Nuclear Brightness Profiles of Merger Remnants: Constraints on the Formation of Ellipticals by Mergers

1999-10-14

arxiv.org/abs/astro-ph/9910275v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of "Galaxy Dynamics: from the Early Universe to the Present", eds. F. Combes, G.A. Mamon and V. C

Scientific paper

We present preliminary results of an HST/NICMOS program to image merger remnants in the J, H and K bands. The nuclear brightness profiles for most sample galaxies are similar to those typical for elliptical galaxies, but some (including the well-studied NGC 3921 and 7252) have an unusually high luminosity density at small radii. This is consistent with the prediction of N-body simulations that gas flows to the center during a merger and forms new stars.

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