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The Formation of Young Clusters in Three Ongoing Galaxy Mergers

Published online by Cambridge University Press:  01 August 2006

B. Rothberg ,
B. Whitmore ,
F. Schweizer ,
R. Chandar ,
R. van der Marel ,
J. Rossa ,
W. Blair ,
S. Mengel  and
M. Rieke
B. Rothberg
Affiliation:
STScI, USA, email: rothberg@stsci.edu
B. Whitmore
Affiliation:
STScI, USA, email: rothberg@stsci.edu
F. Schweizer
Affiliation:
Carnegie Observatories, USA
R. Chandar
Affiliation:
Carnegie Observatories, USA
R. van der Marel
Affiliation:
STScI, USA, email: rothberg@stsci.edu
J. Rossa
Affiliation:
Department of Astronomy, University of Florida, USA
W. Blair
Affiliation:
Department of Physics & Astronomy, Johns Hopkins University, USA
S. Mengel
Affiliation:
ESO, Germany
M. Rieke
Affiliation:
Steward Observatory, University of Arizona, USA
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Abstract

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High-resolution, multi-wavelength (UV through NIR) imaging from the Hubble Space Telescope has been obtained for three mergers in the Toomre Sequence, NGC 520, NGC 2623, & NGC 3256, to identify and measure the properties of young Globular Cluster (GC) candidates. Unlike previous merger studies, this work focuses on objects that lie in the middle of the Toomre Sequence. This age range represents a critical dynamical transition in the merging sequence between ongoing mergers and advanced remnants with properties more akin to elliptical galaxies. The early results of our investigation include luminosity functions and age-dating of the GC candidates. These results also address the impact of the dynamical state of the merger on the current young cluster population as compared with earlier studies that have dealt with the very oldest and very youngest mergers in the Toomre Sequence.

Keywords

galaxies: formationgalaxies: interactionsgalaxies: star clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 240
Copyright
Copyright © International Astronomical Union 2007