Spatial Segregation of Massive Clusters in Dwarf Galaxies

Bruce G. Elmegreen; A. Adamo; M. Boquien; F. Bournaud; D. Calzetti; D. O. Cook; D. A. Dale; P. A. Duc; D. M. Elmegreen; J. Fensch; K. Grasha; Hwi Kim; L. Kahre; M. Messa; J. E. Ryon; E. Sabbi; L. J. Smith

doi:10.3847/2041-8213/ab632a

Spatial Segregation of Massive Clusters in Dwarf Galaxies

Bruce G. Elmegreen, A. Adamo, M. Boquien, F. Bournaud, D. Calzetti, D. O. Cook, D. A. Dale, P. A. Duc, D. M. Elmegreen, J. Fensch, K. Grasha, Hwi Kim, L. Kahre, M. Messa, J. E. Ryon, E. Sabbi, L. J. Smith

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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.

Original language	English
Article number	L27
Journal	Astrophysical Journal Letters
Volume	888
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ab632a
Publication status	Published - 10 Jan 2020

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Elmegreen, B. G., Adamo, A., Boquien, M., Bournaud, F., Calzetti, D., Cook, D. O., Dale, D. A., Duc, P. A., Elmegreen, D. M., Fensch, J., Grasha, K., Kim, H., Kahre, L., Messa, M., Ryon, J. E., Sabbi, E., & Smith, L. J. (2020). Spatial Segregation of Massive Clusters in Dwarf Galaxies. Astrophysical Journal Letters, 888(2), Article L27. https://doi.org/10.3847/2041-8213/ab632a

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title = "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.",

author = "Elmegreen, {Bruce G.} and A. Adamo and M. Boquien and F. Bournaud and D. Calzetti and Cook, {D. O.} and Dale, {D. A.} and Duc, {P. A.} and Elmegreen, {D. M.} and J. Fensch and K. Grasha and Hwi Kim and L. Kahre and M. Messa and Ryon, {J. E.} and E. Sabbi and Smith, {L. J.}",

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doi = "10.3847/2041-8213/ab632a",

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T1 - Spatial Segregation of Massive Clusters in Dwarf Galaxies

AU - Elmegreen, Bruce G.

AU - Adamo, A.

AU - Boquien, M.

AU - Bournaud, F.

AU - Calzetti, D.

AU - Cook, D. O.

AU - Dale, D. A.

AU - Duc, P. A.

AU - Elmegreen, D. M.

AU - Fensch, J.

AU - Grasha, K.

AU - Kim, Hwi

AU - Kahre, L.

AU - Messa, M.

AU - Ryon, J. E.

AU - Sabbi, E.

AU - Smith, L. J.

PY - 2020/1/10

Y1 - 2020/1/10

N2 - 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.

AB - 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.

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U2 - 10.3847/2041-8213/ab632a

DO - 10.3847/2041-8213/ab632a

M3 - Article

SN - 2041-8205

VL - 888

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L27

ER -

Spatial Segregation of Massive Clusters in Dwarf Galaxies

Abstract

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