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The Gaia-ESO Survey (GES) observed many open clusters as part of its programme to spectroscopically characterise the various Milky Way populations. GES spectroscopy and Gaia astrometry from its second data release are used here to assign…

We determine the color excesses, photometric distances, ages, astrometric parallaxes and proper motions for 94 open clusters in the northern part of the Milky Way. We estimate the color excesses and photometric distances based on the data…

Astrophysics of Galaxies · Physics 2018-09-19 L. N. Yalyalieva , A. A. Chemel , E. V. Glushkova , A. K. Dambis , A. D. Klinichev

The second Gaia data release (DR2) is scheduled for April 2018. While Gaia DR1 had increased the number of stars with parallaxes by a factor 20 with respect to the Hipparcos catalogue, Gaia DR2 will bring another factor 500 increase, with…

Astrophysics of Galaxies · Physics 2017-11-06 D. Katz , A. G. A. Brown

The large astrometric and photometric survey performed by the Gaia mission allows for a panoptic view of the Galactic disc and in its stellar cluster population. Hundreds of clusters were only discovered after the latest G data release…

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…

Solar and Stellar Astrophysics · Physics 2018-03-21 W. H. Elsanhoury , E. S. Postnikova , N. V. Chupina , S. V. Vereshchagin , Devesh P. Sariya , R. K. S. Yadav , Ing-Guey Jiang

We use the data from Gaia Early Data Release 3 (EDR3) to study the kinematic properties of Milky Way globular clusters. We measure the mean parallaxes and proper motions (PM) for 170 clusters, determine the PM dispersion profiles for more…

Astrophysics of Galaxies · Physics 2021-07-14 Eugene Vasiliev , Holger Baumgardt

This study presents structural and fundamental astrophysical parameters of poorly studied open cluster NGC 2509. We used the third photometric and astrometric data release of the Gaia (Gaia DR3) to perform analyses. By taking into account…

Astrophysics of Galaxies · Physics 2023-09-12 T. Yontan , S. Koc

Several studies have been presented in the last few years applying some kind of automatic processing of data to estimate the fundamental parameters of open clusters. These parameters are later on employed in larger scale analyses, for…

Astrophysics of Galaxies · Physics 2022-07-27 G. I. Perren , M. S. Pera , H. D. Navone , R. A. Vázquez

In this study, we considered the optical wavelength of Gaia DR3 to analyze poorly studied three newly open star clusters namely OCSN 203, OCSN 213, and OCSN 244 clusters with ASTECA code. Here, we identified candidates of 227, 200, and 551…

Solar and Stellar Astrophysics · Physics 2024-12-12 W. H. Elsanhoury , Haroon A. A , E. A. Elkholy , D. C. Çınar

In an earlier work, we demonstrated the effectiveness of Bayesian neural networks in estimating the missing line-of-sight velocities of Gaia stars, and published an accompanying catalogue of blind predictions for the line-of-sight…

Astrophysics of Galaxies · Physics 2023-12-13 Aneesh P. Naik , Axel Widmark

This research note presents a comparison of radial velocities between the RAVE DR5 data release with Gaia DR2. RAVE DR5 and Gaia DR2 have 450587 stars in common. In particular we would like to shed light on a small subset of joint targets…

Astrophysics of Galaxies · Physics 2018-10-24 Matthias Steinmetz , Tomaz Zwitter , Gal Matijevic , Alessandro Siviero , Ulisse Munari

Although previous searches for star clusters have been very successful, many clusters are likely still omitted, especially at high Galactic latitude regions. In this work, based on the astrometry of Gaia EDR3, we searched nearby (parallax >…

Astrophysics of Galaxies · Physics 2022-08-31 Zhihong He , Kun Wang , Yangping Luo , Jing Li , Xiaochen Liu , Qingquan Jiang

We investigate the nature of nearby (10-15 kpc) high-speed stars in the Gaia DR2 archive identified on the basis of parallax, proper motion and radial velocity. Together with a consideration of their kinematic, orbital, and photometric…

Astrophysics of Galaxies · Physics 2018-11-28 Benjamin C. Bromley , Scott J. Kenyon , Warren R. Brown , Margaret J. Geller

Empirical constraints on the internal dynamics of open clusters are important for understanding their evolution and evaporation. High precision astrometry from Gaia DR3 are thus useful to observe aspects of the cluster dynamics. This work…

Astrophysics of Galaxies · Physics 2024-07-03 Vikrant V. Jadhav , Pavel Kroupa , Wenjie Wu , Jan Pflamm-Altenburg , Ingo Thies

Despite having data for over 10^9 stars from Gaia, only less than 10^4 star clusters and candidates have been discovered. Particularly, distant star clusters are rarely identified, due to the challenges posed by heavy extinction and great…

Astrophysics of Galaxies · Physics 2023-08-09 Zhihong He , Yangping Luo , Kun Wang , Anbing Ren , Liming Peng , Qian Cui , Xiaochen Liu , Qingquan Jiang

We present an investigation of the open cluster Trumpler 2 using Gaia DR3 photometric, astrometric and spectroscopic data. 92 stars were identified as likely members of the cluster, with membership probabilities greater than 0.5. The mean…

Astrophysics of Galaxies · Physics 2023-04-28 S. Tasdemir , T. Yontan

We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns of members in…

Solar and Stellar Astrophysics · Physics 2025-10-21 Harsha K. H. , Annapurni Subramaniam , S. R. Dhanush , Hariharan D. S

Identifying and characterizing young populations of star-forming regions is crucial to unravel their properties. In this regard, Gaia-DR3 data and machine learning tools are very useful for studying large star-forming complexes. In this…

Astrophysics of Galaxies · Physics 2023-05-03 Swagat R. Das , Saumya Gupta , Prem Prakash , Manash Samal , Jessy Jose

We present mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC5 catalog. This follows our previous studies with the UCAC2 and UCAC4…

Solar and Stellar Astrophysics · Physics 2018-06-13 W. S. Dias , H. Monteiro , M. Assafin

We used Gaia DR2 data in order to estimate parameters of the Pleiades. With the data on stars with m_G<=18 mag, we constructed the density maps and profile, luminosity and mass functions, determined the cluster radius, 10.9+/-0.3 deg…

Astrophysics of Galaxies · Physics 2021-01-20 Vladimir M. Danilov , Anton F. Seleznev