Absolute proper motion of the Galactic open cluster M67

Details Absolute proper motion of the Galactic open cluster M67 Absolute proper motion of the Galactic open cluster M67

2010-05-05

arxiv.org/abs/1005.0840v1

2010A&A...513A..51B

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

7 pages, 5 figures, and 3 tables. Published in Astronomy and Astrophysics, Volume 513, id.A51.

Scientific paper

10.1051/0004-6361/200913882

We derived the absolute proper motion (PM) of the old, solar-metallicity Galactic open cluster M67 using observations collected with CFHT (1997) and with LBT (2007). About 50 galaxies with relatively sharp nuclei allow us to determine the absolute PM of the cluster. We find (mu_alpha cos(delta),mu_delta)_J2000.0 = (-9.6+/-1.1,-3.7+/-0.8) mas/yr. By adopting a line-of-sight velocity of 33.8+/-0.2 km/s, and assuming a distance of 815+/-50 pc, we explore the influence of the Galactic potential, with and without the bar and/or spiral arms, on the galactic orbit of the cluster.

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