Showing astro-phShow all
2 papers · 1 filter
astro-ph2007
Direct determination of the epicycle frequency in the galactic disk, and the derived rotation velocity V0
J. R. D. Lepine, Wilton S. Dias, Yuri Mishurov
We present a method which allows a direct measurement of the epicycle frequency in the galactic disk, using the large database on open clusters completed by our group. The obse…
astro-ph2000
Proper motion and membership determination in the young open cluster NGC1662
W. S. Dias, R. Boczko, J. I. B. Camargo +2
Relative proper motions and cluster membership probabilities of 30 stars within an area of 14' of diameter centered in the open cluster NGC1662 (α=04^{\rm h}48^{\rm m}, δ=+10^{\rm…