Spatial Segregation of Massive Clusters in Dwarf Galaxies
Abstract
The relative average minimum projected separations of star clusters in the Legacy ExtraGalactic UV Survey (LEGUS) and in tidal dwarfs around the interacting galaxy NGC 5291 are determined as a function of cluster mass to look for cluster–cluster mass segregation. Class 2 and 3 LEGUS clusters, which have a more irregular internal structure than the compact and symmetric class 1 clusters, are found to be mass-segregated in low-mass galaxies, which means that the more massive clusters are systematically bunched together compared to the lower-mass clusters. This mass segregation is not present in high-mass galaxies or class 1 clusters. We consider possible causes for this segregation, including differences in cluster formation and scattering in the shallow gravitational potentials of low-mass galaxies.
Additional Information
© 2020 The American Astronomical Society. Received 2019 December 2; revised 2019 December 13; accepted 2019 December 16; published 2020 January 16. The authors are grateful to the referee for comments on the manuscript. This work is based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs #13364 (LEGUS) and #14727 (NGC 5291), including grant HST-GO-14727.004-A to B.G.E. A.A. acknowledges the support of the Swedish Research Council, Vetenskapsrådet, and the Swedish National Space Agency (SNSA). This research has made use of the NASA/IPAC Extragalactic Database (NED), which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology.Attached Files
Published - Elmegreen_2020_ApJL_888_L27.pdf
Accepted Version - 1912.08293.pdf
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Additional details
- Eprint ID
- 102260
- Resolver ID
- CaltechAUTHORS:20200402-090152205
- NAS 5-26555
- NASA
- HST-GO-14727.004-A
- NASA Hubble Fellowship
- Swedish Research Council
- Vetenskapsrådet
- Swedish National Space Agency (SNSA)
- Created
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2020-04-02Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field