C.D.S. - SIMBAD4 rel 1.7 - 2021.01.18CET18:33:34

2018ApJ...853..104B - Astrophys. J., 853, 104-104 (2018/February-1)

The distribution and ages of star clusters in the Small Magellanic Cloud: constraints on the interaction history of the Magellanic Clouds.


Abstract (from CDS):

We present a new study of the spatial distribution and ages of the star clusters in the Small Magellanic Cloud (SMC). To detect and estimate the ages of the star clusters we rely on the new fully automated method developed by Bitsakis et al. Our code detects 1319 star clusters in the central 18 deg2 of the SMC we surveyed (1108 of which have never been reported before). The age distribution of those clusters suggests enhanced cluster formation around 240 Myr ago. It also implies significant differences in the cluster distribution of the bar with respect to the rest of the galaxy, with the younger clusters being predominantly located in the bar. Having used the same setup, and data from the same surveys as for our previous study of the LMC, we are able to robustly compare the cluster properties between the two galaxies. Our results suggest that the bulk of the clusters in both galaxies were formed approximately 300 Myr ago, probably during a direct collision between the two galaxies. On the other hand, the locations of the young (<=50 Myr) clusters in both Magellanic Clouds, found where their bars join the H I arms, suggest that cluster formation in those regions is a result of internal dynamical processes. Finally, we discuss the potential causes of the apparent outside-in quenching of cluster formation that we observe in the SMC. Our findings are consistent with an evolutionary scheme where the interactions between the Magellanic Clouds constitute the major mechanism driving their overall evolution.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): catalogs - galaxies: star clusters: general - Magellanic Clouds - methods: statistical - methods: statistical

VizieR on-line data: <Available at CDS (J/ApJ/853/104): table1.dat>

Nomenclature: Table 1: [BGB2018] SMC-IR1-NNN N=466 among (Nos IR1-182 to IR1-787), [BGB2018] SMC-M2-NNN N=453 among (Nos M2-1 to M2-455), [BGB2018] SMC-NUV-NNNN N=400 among (Nos NUV-480 to NUV-1091).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9649 1
2 NAME SMC Bar PoG 01 05 -72.6           ~ 202 0
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5823 1
4 NAME Magellanic Bridge HI 03 11 -77.5           ~ 347 1
5 LHA 120-N 79 HII 04 52 00 -69 22.5           ~ 55 1
6 NAME LMC Bar ? 05 22 08 -69 23.5           ~ 266 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15112 1
8 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1056 2

    Equat.    Gal    SGal    Ecl

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