The structure of the AD diagram for the hyades cluster

Верещагин, С. В.; Reva, V. G.; Чупина, Н. В.

doi:10.1134/s1063772908020029

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…We also list the coordinates of the Hyades apex determined using the same method from our earlier paper (Vereshchagin et al 2008). The Hyades cluster (in Fig.…”

Section: The Apex Diagrammentioning

confidence: 99%

“…We find the individual apex positions by computing the equatorial coordinates (A, D) of the points where stellar space velocity vectors starting at the center of the celestial sphere cross this sphere. Figure 1 shows the AD-diagram for the Praesepe and Hyades clusters (Vereshchagin et al 2008(Vereshchagin et al , 2013. We adopt the radial velocities, proper motions, and parallaxes needed for the AD-method from the WEBDA database.…”

Section: The Apex Diagrammentioning

confidence: 99%

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Apex and internal structure of the Praesepe open cluster

Верещагин

Чупина

2013

Astron Nachr

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The results of a study of the internal structure and kinematics of the Praesepe cluster are reported. The "AD-diagram" method is used to determine the position of the cluster apex, which is found to be close to the apex positions of other clusters, in particular to the Hyades apex. The internal morphology of the cluster is also analyzed. The distribution of the Praesepe members in the XY -plane shows that the cluster consists of a homogeneous core and a non-uniform corona. An analysis of stellar radial velocities and parallaxes reveals their weak correlation. This might be due to the axial rotation of the cluster. The inferred rotational velocity is comparable with that of the Hyades within the quoted errors.

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“…We also list the coordinates of the Hyades apex determined using the same method from our earlier paper (Vereshchagin et al 2008). The Hyades cluster (in Fig.…”

Section: The Apex Diagrammentioning

confidence: 99%

Section: The Apex Diagrammentioning

confidence: 99%

Apex and internal structure of the Praesepe open cluster

Верещагин

Чупина

2013

Astron Nachr

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Aggregation of Knowledge on Star Cluster Structure and Kinematics in Data Intensive Astronomy

Верещагин

Postnikova

2018

Communications in Computer and Information Science

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The Pleiades apex and its kinematical structure

Elsanhoury¹,

Postnikova²,

Чупина³

et al. 2018

Astrophys Space Sci

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A study of cluster characteristics and internal kinematical structure of the middle-aged Pleiades open star cluster is presented. The individual star apexes and various cluster kinematical parameters including the velocity ellipsoid parameters are determined using both Hipparcos and Gaia data. Modern astrometric parameters were taken from the Gaia Data Release 1 (DR1) in combination with the Radial Velocity Experiment Fifth Data Release (DR5). The necessary set of parameters including parallaxes, proper motions and radial velocities are used for n=17 stars from Gaia DR1+RAVE DR5 and for n=19 stars from the Hipparcos catalog using SIMBAD data base. Single stars are used to improve accuracy by eliminating orbital movements. RAVE DR5 measurements were taken only for the stars with the radial velocity errors not exceeding 2 km/s. For the Pleiades stars taken from Gaia, we found mean heliocentric distance as 136.8 ± 6.4 pc, and the apex position is calculated as: A CP = 92 • .52 ± 1 • .72, D CP = −42 • .28 ± 2 • .56 by the convergent point method and A 0 = 95 • .59 ± 2 • .30 and D 0 = −50 • .90 ± 2 • .04 using AD-diagram method (n=17 in both cases). The results are compared with those obtained historically before the Gaia mission era.

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The structure of the AD diagram for the hyades cluster

Cited by 7 publications

References 3 publications

Apex and internal structure of the Praesepe open cluster

Apex and internal structure of the Praesepe open cluster

Aggregation of Knowledge on Star Cluster Structure and Kinematics in Data Intensive Astronomy

The Pleiades apex and its kinematical structure

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