期刊
ASTRONOMICAL JOURNAL
卷 126, 期 2, 页码 772-777出版社
UNIV CHICAGO PRESS
DOI: 10.1086/376480
关键词
astrometry; globular clusters : individual (NGC 104=47 Tucanae); stellar dynamics
We have used the Hubble Space Telescope (HST) to measure the component of rotation of 47 Tuc in the plane of the sky, using background stars of the SMC as a reference. The rotation is comparable to that in the line of sight, showing that the axis of rotation of the cluster is considerably inclined. We also give an improved value of the absolute proper motion of 47 Tuc.
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