A proper motion study of the globular cluster M55

Details A proper motion study of the globular cluster M55 A proper motion study of the globular cluster M55

2011-03-09

arxiv.org/abs/1103.1733v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

12 figures and 4 tables, accepted for publication in MNRAS Main Journal; full PM catalogue (Table 3) at http://case.camk.edu.p

Scientific paper

We have derived the absolute proper motion (PM) of the globular cluster M55 using a large set of CCD images collected with the du Pont telescope between 1997 and 2008. We find (PM_RA*cos(DEC), PM_DEC) = (-3.31 +/- 0.10, -9.14 +/- 0.15) mas/yr relative to background galaxies. Membership status was determined for 16 945 stars with 14

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