718 citations · 3.4k across the 36 of their papers we have counts for
4 papers · 2 filters
Shape parameters of Galactic open clusters
N. V. Kharchenko, P. Berczik, M. I. Petrov +4
(abridged) In this paper we derive observed and modelled shape parameters (apparent ellipticity and orientation of the ellipse) of 650 Galactic open clusters identified in the ASCC…
An extremely wide and very low-mass pair with common proper motion. Is it representative of a nearby halo stream?
R. -D. Scholz, N. V. Kharchenko, N. Lodieu +1
(abridged) We describe the discovery of an extremely wide pair of low-mass stars with a common large proper motion and discuss their possible membership in a Galactic halo stream c…
The initial luminosity and mass functions of the Galactic open clusters
A. E. Piskunov, N. V. Kharchenko, E. Schilbach +3
(... abridged) The observed luminosity function can be constructed in a range of absolute integrated magnitudes mag, i.e. about 5 magnitudes deeper than in t…
PPM-Extended (PPMX) - a catalogue of positions and proper motions
S. Roeser, E. Schilbach, H. Schwan +3
Aims: We build a catalogue PPM-Extended (PPMX) on the ICRS system which is complete down to a well-defined limiting magnitude and contains the best presently available proper motio…