2021A&A...650A..52P


Query : 2021A&A...650A..52P

2021A&A...650A..52P - Astronomy and Astrophysics, volume 650A, 52-52 (2021/6-1)

The kinematics of Small Magellanic Cloud star clusters.

PIATTI A.E.

Abstract (from CDS):

We report results of the proper motions of 25 known Small Magellanic Cloud (SMC) clusters (ages∼1-10Gyr old) derived from Gaia EDR3 data sets. When these mean proper motions were gathered with existent radial velocity measurements to compose the clusters' velocity vectors, we found the parameter values of a rotation disk that best resemble their observed motions, namely: central coordinates and distance, inclination and position angle of the line-of-nodes, proper motion in right ascension and declination, systemic velocity, rotation velocity, and velocity dispersion. The SMC cluster rotation disk seems to be, at some level, kinematically synchronized with the rotation of the field red giants recently modeled using DR2 data sets. Such a rotation disk is seen in the sky as a tilted edge-on disk, with a velocity dispersion perpendicular to it that is twice as large as that in the plane of the disk. Because the direction perpendicular to the disk is nearly aligned with the Magellanic Bridge, we interpret the larger velocity dispersion as a consequence of the SMC velocity stretching caused by the tidal interaction with the Large Magellanic Cloud. Rotation alone does not seem sufficient to explain the observed kinematic behaviors in the SMC.

Abstract Copyright: © ESO 2021

Journal keyword(s): galaxies: individual: SMC - galaxies: star clusters: general

Simbad objects: 34

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Number of rows : 34
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 118 0
2 ESO 28-15 OpC 00 21 27 -73 44.9   13.9       ~ 30 0
3 ESO 28-16 Cl* 00 22 40 -75 04.5   15.7       ~ 29 0
4 ESO 28-17 OpC 00 23 04 -73 40.2   15.3       ~ 29 0
5 Cl Lindsay 7 Cl* 00 24 43.16 -73 45 11.7   13.2       ~ 35 0
6 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 147 0
7 ESO 28-20 Cl* 00 25 26.60 -74 04 29.7 15.45 14.88 14.23   13.13 ~ 31 0
8 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 308 0
9 ESO 28-22 OpC 00 27 45.17 -72 46 52.5 14.78 14.75 13.95   12.75 ~ 49 0
10 [RZ2005] 5 OpC 00 28 02.14 -73 18 13.6 15.74 15.46 14.85   13.85 ~ 23 0
11 [RZ2005] 7 OpC 00 30 00.26 -73 22 40.7 15.46 14.92 13.84   12.52 ~ 27 0
12 Cl Lindsay 17 OpC 00 35 41.70 -73 35 51.4 14.27 14.13 13.35   12.45 ~ 27 0
13 Cl Lindsay 19 Cl* 00 37 41.78 -73 54 19.7 13.70 14.78 13.18   12.17 ~ 33 0
14 Cl Lindsay 27 Cl* 00 41 23.83 -72 53 32.0 13.37 13.28 12.44   11.49 ~ 43 0
15 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11040 1
16 NGC 339 OpC 00 57 47.62 -74 28 14.6 13.23 12.94 12.21   11.20 ~ 143 0
17 [RZ2005] 103 OpC 00 57 48.53 -74 19 31.6 15.12 14.79 14.24   13.58 ~ 30 0
18 HW 40 Cl* 01 00 25.11 -71 17 43.8 16.07 15.96 15.18   14.19 ~ 25 0
19 Cl Kron 44 OpC 01 02 06.34 -73 55 22.7 14.05 13.73 12.95   11.82 ~ 40 0
20 NGC 361 OpC 01 02 11.11 -71 36 25.3 12.86 12.43 11.77   10.70 ~ 100 0
21 HW 47 Cl* 01 04 05.37 -74 37 06.1 16.68 16.13 15.25   13.95 ~ 22 0
22 OGLE-CL SMC 237 Cl* 01 04 22.49 -72 50 51.9           ~ 24 0
23 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 271 0
24 HW 67 Cl* 01 13 01.82 -70 57 47.1 16.57 16.25 15.63   14.86 ~ 22 0
25 ESO 29-44 Cl* 01 30 38 -76 03.3   16.4       ~ 24 0
26 Cl Lindsay 108 Cl* 01 31 32 -71 57.2   14.8       ~ 24 0
27 ESO 29-48 Cl* 01 34 26 -72 52.5   14.3       ~ 28 0
28 NGC 643 Cl* 01 34 55.99 -75 33 17.1           ~ 29 1
29 Cl Lindsay 112 Cl* 01 36 01 -75 27.5   16.2       ~ 25 0
30 HW 84 Cl* 01 41 43 -71 09.7           ~ 20 0
31 HW 86 Cl* 01 42 22 -74 10.4           ~ 23 0
32 Cl Lindsay 113 Cl* 01 49 30.0 -73 43 40   11.9       ~ 89 0
33 NAME Magellanic Bridge HI 03 11 -77.5           ~ 439 1
34 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17259 1

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