The subsystem of open clusters in the post-hipparcos era: Cluster structural parameters and proper motions

Kharchenko, N. V.; Pakulyak, L. K.; Пискунов, А. Э.

doi:10.1134/1.1568131

Cited by 17 publications

(34 citation statements)

References 10 publications

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“…For 91% of the clusters, the proper-motion components µ x,y are determined with standard errors of less than ±1 mas/yr (for 42% -less than ±0.5 mas/yr). The proper motions are derived directly in the Hipparcos system, for 301 clusters -for the first time (see also Kharchenko et al 2003). Figure 4 compares the cluster proper motions derived in this study with the corresponding findings of Robichon et al (1999), Baumgardt et al (2000), and Dias et al (2001Dias et al ( , 2002, which are all based on the data from the Hipparcos and Tycho-2 catalogues.…”

Section: Proper Motionsmentioning

confidence: 72%

“…Nevertheless, the sizes derived are based on counts of relatively bright stars (V 12), and thus they can be influenced by the mass segregation effect (see e.g. Raboud & Mermilliod 1998;or Kharchenko et al 2003). Therefore our data should be considered as lower limits of the actual cluster sizes.…”

Section: Angular Sizesmentioning

confidence: 99%

“…catalogue of Kharchenko et al (2003). In the current version of the COCD we implement our own isochrone-based procedure of age determination, which provides a uniform scale of ages for all clusters.…”

Section: Cluster Agesmentioning

confidence: 99%

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Astrophysical parameters of Galactic open clusters

Kharchenko

Пискунов

Röser

et al. 2005

A&A

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622

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722

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Abstract. We present a catalogue of astrophysical data for 520 Galactic open clusters. These are the clusters for which at least three most probable members (18 on average) could be identified in the ASCC-2.5, a catalogue of stars based on the Tycho-2 observations from the Hipparcos mission. We applied homogeneous methods and algorithms to determine angular sizes of cluster cores and coronae, heliocentric distances, mean proper motions, mean radial velocities, and ages. For the first time we derive distances for 200 clusters, radial velocities for 94 clusters, and ages of 196 clusters. This homogeneous new parameter set is compared with earlier determinations, where we find, in particular, that the angular sizes were systematically underestimated in the literature.

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Section: Proper Motionsmentioning

confidence: 72%

Section: Angular Sizesmentioning

confidence: 99%

See 1 more Smart Citation

Astrophysical parameters of Galactic open clusters

Kharchenko

Пискунов

Röser

et al. 2005

A&A

Self Cite

622

113

722

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show abstract

“…Our results cannot be compared directly to those in the literature previous to the Hipparcos mission, since they follow a Kharchenko et al (2003); and by our group, compiled in the DAML02 Catalogue. Even so, these authors used different data, methods, and criteria to select the members and, consequently, different samples of the stars to determine the mean proper motion of the clusters.…”

Section: Discussion Of the Resultsmentioning

confidence: 91%

“…Stars were divided into three categories (members, possible members, and non-members) according to how they fulfilled the membership criteria. Kharchenko et al (2003) obtained results of fundamental parameters and mean proper motions from membership determinations for 401 clusters. They used individual stellar data from ASCC-2.5 all-sky Catalogue (All-Sky Combined Catalog of Astrometric Data for 2.5 Million Stars; Gulyaev & Nesterov 1992).…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Proper motion determination of open clusters based on the UCAC2 catalogue

Dias

Assafin

Florio³

et al. 2006

A&A

102

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We present the kinematics of hundreds of open clusters, based on the UCAC2 Catalogue positions and proper motions. Membership probabilities were obtained for the stars in the cluster fields by applying a statistical method uses stellar proper motions. All open clusters with known distance were investigated, and for 75 clusters this is the first determination of the mean proper motion. The results, including the DSS images of the cluster's fields with the kinematic members marked, are incorporated in the Open Clusters Catalogue supported on line by our group.

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Astrophysical supplements to the ASCC‐2.5. I. Radial velocity data

2004

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We present a catalogue of radial velocities of Galactic stars with high precision astrometric data CRVAD which is the result of the cross-identification of star lists from the General Catalog of Average Radial Velocities (GCRV) and from the homogeneous All-sky Compiled Catalogue of 2.5 Million Stars (ASCC-2.5). The CRVAD includes accurate J2000 equatorial coordinates, proper motions and trigonometric parallaxes in the Hipparcos system, Johnson's BV photometric data, spectral types, multiplicity and variability flags from the ASCC-2.5, and radial velocities, stellar magnitudes and spectral types from the GCRV for 34553 ASCC-2.5 stars. The CRVAD was used for the construction of a sample of standard stars with accurate astrometric, photometric and radial velocity data for the RAVE project. A second application of the CRVAD , the radial velocity determination for 292 open clusters (including 97 with previously unknown radial velocities), using their newly defined members from proper motions and photometry in the ASCC-2.5, is briefly described.

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The subsystem of open clusters in the post-hipparcos era: Cluster structural parameters and proper motions

Cited by 17 publications

References 10 publications

Astrophysical parameters of Galactic open clusters

Astrophysical parameters of Galactic open clusters

Proper motion determination of open clusters based on the UCAC2 catalogue

Astrophysical supplements to the ASCC‐2.5. I. Radial velocity data

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