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This study calculated astrophysical parameters, as well as kinematic and galactic orbital parameters, of the open clusters NGC 1664 and NGC 6939. The work is based on CCD UBV and Gaia photometric and astrometric data from ground and…

Astrophysics of Galaxies · Physics 2022-04-06 S. Koc , T. Yontan , S. Bilir , R. Canbay , T. Ak , T. Banks , S. Ak , E. Paunzen

We performed counts of stars with poor astrometric solutions of Gaia DR3 in the regions of open star clusters: NGC 188, NGC 1039, NGC 2287, NGC 2301, NGC 2360, NGC 2420, NGC 2527, NGC 2548, NGC 2682 (M 67), NGC 3114, NGC 3766, NGC 5460, NGC…

Astrophysics of Galaxies · Physics 2025-09-15 Dmitry I. Tagaev , Anton F. Seleznev

In this study, we utilize photometric and kinematic data from \textit{Gaia} DR3 and the {\sc ASteCA} package to analyze the sparsely studied open clusters, King 2 and King 5. For King 2, we identify 340 probable members with membership…

Astrophysics of Galaxies · Physics 2025-03-25 Aly Haroon , Waleed Elsanhoury , Essam Elkholy , Abdel naby Saad , Deniz Cennet Çınar

Open clusters are central elements of our understanding of the Galactic disk evolution, as an accurate determination of their parameters leads to an unbiased picture of our Galaxy's structure. Extending the analysis towards fainter…

Astrophysics of Galaxies · Physics 2021-02-22 K. Peña Ramírez , C. González-Fernández , A. -N. Chené , S. Ramírez Alegría

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

We present Magellan/M2FS spectroscopy of four recently discovered Milky Way star clusters (Gran 3/Patchick~125, Gran 4, Garro 01, LP 866) and two newly discovered open clusters (Gaia 9, Gaia 10) at low Galactic latitudes. We measure…

A detailed analysis of the structural, astrophysical, kinematic, and dynamical properties of the open clusters Roslund 3 and Ruprecht1 74 is carried out using CCD UBV photometry in conjunction with astrometric and photometric data from Gaia…

Astrophysics of Galaxies · Physics 2025-07-08 H. Karagoz , T. Yontan , S. Bilir , O. Plevne , T. Ak , S. Ak , R. Canbay , T. Banks

In the Gaia era, a comprehensive analysis of the binary open clusters NGC 869 (h Persei) and NGC 884 (chi Persei) system has been conducted to investigate its structural, astrophysical, kinematic, and Galactic orbital properties, along with…

Astrophysics of Galaxies · Physics 2026-01-26 Seval Taşdemir , Waleed Elsanhoury , Deniz Cennet Çınar , Aly Haroon , Selçuk Bilir

NGC 2355 is an old open cluster in the outer part of the galactic disk (l=203 deg, b=+11 deg) which has been little studied until now. This paper presents the first astrometric and spectroscopic investigation of this cluster. We have…

Astrophysics · Physics 2007-05-23 C. Soubiran , M. Odenkirchen , J. -F. Le Campion

We investigate the evolutionary stages of four open clusters, Berkeley 39, Collinder 261, NGC 6819, and NGC 7789, of ages ranging from 1.6 -- 6 Gyr. These clusters have previously been classified into dynamically young and intermediate age…

Astrophysics of Galaxies · Physics 2024-09-17 Shanmugha Balan , Khushboo K Rao , Kaushar Vaidya , Manan Agarwal , Souradeep Bhattacharya

Context: Open clusters are key to studying the formation and evolution of the Galactic disc. However, there is a deficiency of radial velocity and chemical abundance determinations for open clusters in the literature. Aims: We intend to…

Solar and Stellar Astrophysics · Physics 2015-05-27 R. Carrera , L. Casamiquela , N. Ospina , L. Balaguer-Nuñez , C. Jordi , L. Monteagudo

Multi-color photometry of the stellar populations in five fields in the third Galactic quadrant centred on the clusters NGC 2215, NGC 2354, Haffner 22, Ruprecht 11, and ESO489SC01 is interpreted in terms of a warped and flared Galactic…

Astrophysics of Galaxies · Physics 2015-12-09 Giovanni Carraro , Anton F. Seleznev , Gustavo L. Baume , David G. Turner

We present photometric, astrometric, and kinematic studies of the old open star clusters NGC 1193 and NGC 1798. Both of the clusters are investigated by combining data sets from Gaia EDR3 and CCD UBV observational data. Analysis of the…

Astrophysics of Galaxies · Physics 2022-10-12 T. Yontan , H. Cakmak , S. Bilir , T. Banks , M. Raul , R. Canbay , S. Koc , S. Tasdemir , H. Ercay , B. Tanik Ozturk , D. C. Dursun

We performed star counts in the region of the open cluster NGC 3532. The ranges of trigonometric parallaxes and proper motions containing all the stars of the cluster were determined using the stars with 5- and 6-parameter Gaia DR3…

Astrophysics of Galaxies · Physics 2025-04-22 Dmitry I. Tagaev , Anton F. Seleznev

Most stars in our Galaxy form in stellar aggregates, which can become long-lived structures called open clusters (OCs). Along their dynamical evolution, their gradual depletion leave some imprints on their structure. In this work, we…

Astrophysics of Galaxies · Physics 2023-04-19 M. S. Angelo , J. F. C. Santos , F. F. S. Maia , W. J. B. Corradi

A rare multiple open cluster system has been analyzed using Gaia DR3 astrometry and photometry data. Using Agglomerative Hierarchical clustering and Bayesian-HDBSCAN, we identify a compact core consisting of seven known open clusters and…

Astrophysics of Galaxies · Physics 2026-04-28 Muhammad Akmal Husain , Ferdinand , Mochamad Ikbal Arifyanto , Muhammad Irfan Hakim

NGC 2168 (M35) serves as a fundamental benchmark for studying stellar evolution and dynamical environments at the transition between young and intermediate-age populations. We present a comprehensive analysis of the cluster's kinematic,…

Astrophysics of Galaxies · Physics 2026-03-25 Nasser M. Ahmed , Remziye Canbay , Deniz Cennet Çınar

We present a comprehensive photometric and kinematic study of the open clusters HSC 25, HSC 37, and HSC 2878, located in the innermost regions of the Galactic disc. Utilizing data from Gaia DR3 and the UPMASK membership algorithm, we…

Astrophysics of Galaxies · Physics 2026-02-19 Deniz Cennet Çınar , Waleed Elsanhoury , Aly Haroon

We derive fundamental parameters for the old, rich open cluster NGC 1245 using BVI photometry from the MDM 1.3m and 2.4m telescopes. Based on detailed isochrone fitting, we find NGC 1245 has a slightly sub-solar metallicity, [Fe/H]=-0.05 +-…