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X-ray study of NGC 2451 A and B.
We have conducted a detailed study of the object NGC 2451, which actually consists of two different open clusters A and B along the same line of sight at 206pc and 370pc... -
UBVRIHalpha photometry of NGC 3293
Deep and extensive CCD photometric observations at UBV(RI)cH{alpha} were carried out in the area of the open cluster NGC 3293. The new data set allows to see the entire cluster... -
Stellar Rotation in the Orion Nebula Cluster
Table 1 lists the 1562 stars in the Orion Nebula Cluster brighter than I=20mag on which we did photometry. It contains information on the position, brightness and variability of... -
Lithium abundances in IC 2602 and IC 2391
Lithium abundances and [Fe/H] for a sample of late-type stars in the young open clusters IC 2602 and IC 2391. Abundances are based on high resolution spectra obtained at ESO... -
BV and proper motions in NGC 1960 & NGC 2194
We present CCD photometry and proper motion studies of the two open star clusters NGC 1960 (M 36) and NGC 2194. Fitting isochrones to the colour magnitude diagrams, for NGC 1960... -
HRI observations of PMS stars in NGC 2264
We analyze six ROSAT HRI observations pointed toward the Star Forming Region (SFR) NGC 2264. Three are pointed to the southern star formation core, the other three about 20' to... -
Masses of Pleiades members
On the basis of the best available member list and duplicity information, we have studied the radial distribution of 270 stars and multiple systems earlier than K0 in the... -
Variable stars in field of NGC 7789
(no description available) -
Hyades members distances
Distances for 145 Hyades members in an extended region of the Hyades cluster were derived on the basis of new, highly accurate proper motions obtained from work on the... -
HD,HDE,DM Identifications in Open Clusters
The catalog is a compilation of cross-identifications between the numbering system of Mermilliod (1978) for stars in open clusters and the numbering systems of several other... -
Radial Velocities in Open Clusters
This compilation contains more than 5700 individual radial velocities for 370 stars in 4 open clusters. Cone search capability for table III/55/catalog (The compilation) -
MK Classification in NGC 2175
The results of the spectral classification of 1224 O-M stars of different luminosity classes in the region of NGC 2175 and around it are presented. The classification has been... -
Catalog of Stellar Rotational Velocities
The catalog is a compilation of the observed projected rotational velocities, V_rot_sin(i), for 28179 stars from 166 open clusters, globular clusters and associations. The... -
Photometric study of IC 4665
(no description available) -
Tonantzintla Pleiades Flare Stars
The original catalog lists the flare stars discovered by different astronomical observatories over an area slightly larger than 20 square degrees in the Pleiades regions... -
VI photometry of NGC 2157
We have carried out Wide Field Planetary Camera 2 V- and I-band imaging of the young LMC cluster NGC 2157. Construction of a color-magnitude diagram and isochrone fitting yield... -
Open clusters absolute proper motions. I.
Mean proper motions and parallaxes of 205 open clusters were determined from their member stars found in the Hipparcos () Catalogue. 360 clusters were searched for possible... -
Accretion variability monitoring in the ONC
The understanding of the accretion process has a central role in the understanding of star and planet formation. We aim to test how accretion variability influences previous... -
Cluster target Giraffe HR15N RV precision
In the last 15 years different ground-based spectroscopic surveys have been started (and completed) with the general aim to deliver stellar parameters and elemental abundances... -
MWSC Star Cluster Extension 2014a
MWSC-e14a ("MWSC extension 2014a") is a catalogue of 139 new open clusters at high Galactic latitudes (\|b\|>20 deg) including lists of candidate members. It extends the...
