SIMBAD references

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

The kinematics of Small Magellanic Cloud star clusters.


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

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021A&A...650A..52P and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact