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We present the first $BVI$ CCD photometry to $V=22.0$ of 4 fields centered on the region of the southern Galactic star clusters Ruprecht~61, Czernik~32, NGC 2225 and NGC 2262 and of 4 displaced control fields. These clusters were never…

Astrophysics · Physics 2009-11-13 G. Carraro , G. Baume , R. Vazquez , A. Moitinho , D. Geisler

In this paper, we present astrophysical parameters of the open cluster King 13 based on the VI CCD and 2MASS JHKs photometric data. This is a poorly studied cluster, for which new results have been found in the present work. To identify…

Astrophysics of Galaxies · Physics 2020-02-12 Alok Durgapal , D Bisht , Geeta Rangwal , Harmeen Kaur , R. K. S. Yadav

The structure, formation, and evolution of the Milky Way bulge is a matter of debate. Important diagnostics for discriminating between bulge models include alpha-abundance trends with metallicity, and spatial abundance and metallicity…

Astrophysics of Galaxies · Physics 2015-12-23 N. Ryde , M. Schultheis , V. Grieco , F. Matteucci , R. M. Rich , S. Uttenthaler

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

To progress in galactic studies based on open clusters, e.g. cluster formation rate or kinematical properties, one needs to improve the number of open clusters observed. However, only half of the 1700 known galactic open clusters have been…

Astrophysics · Physics 2009-11-11 M. Netopil , H. M. Maitzen , E. Paunzen , A. Claret

Context: The formation and evolution of disk galaxies are long standing questions in Astronomy. Understanding the properties of globular cluster systems can lead to important insights on the evolution of its host galaxy. Aims: We aim to…

Astrophysics of Galaxies · Physics 2015-06-12 Enio Cezario , Paula R. T. Coelho , Alan Alves-Brito , Duncan A. Forbes , Jean P. Brodie

The BVRcIc CCD photometry in the fields of six open clusters toward the Perseus spiral arm is presented. These data along with JHKs magnitudes taken from 2MASS catalog, have been used to determine cluster's ages, distances and color…

Measurements of lithium (Li) abundances in open clusters provide a unique tool for following the evolution of this element with age, metallicity, and stellar mass. Using FLAMES/Giraffe on the VLT, we obtained spectra of 157 candidate…

Solar and Stellar Astrophysics · Physics 2009-11-13 S. Randich , G. Pace , L. Pastori , A. Bragaglia

Globular clusters (GCs) provide statistically significant coeval populations of stars spanning various evolutionary stages, allowing robust constraints on stellar evolution model parameters and ages. We analyze eight old Milky Way GCs with…

Astrophysics of Galaxies · Physics 2025-05-07 Jiaqi , Ying , Brian Chaboyer , Michael Boylan-Kolchin , Daniel Weisz , Rowan Goebel-Bain

Open clusters (OCs) in the Galaxy are excellent probes for tracing the structure and evolution of the Galactic disk. We present an updated catalog of parameters for 1,145 OCs, estimated using the Gaia DR3 data earlier listed in…

Astrophysics of Galaxies · Physics 2025-03-12 Geeta Rangwal , Aman Arya , Annapurni Subramaniam , Kulinder Pal Singh , Xiaowei Liu

The small group of Galactic Globular Clusters (GGC) (Pal 12, Terzan 7, Ruprecht 106, Arp 2) recently discovered to be significantly younger (by ~3-4 Gyr) than the average cluster population of the Galaxy are shown to lie near planes passing…

Astrophysics · Physics 2009-10-28 F. Fusi Pecci , M. Bellazzini , C. Cacciari , F. R. Ferraro

We present B, V, R, and H alpha photometry of 8 clusters in the Small Magellanic Cloud, 5 in the Large Magellanic Cloud, and 3 Galactic clusters, and use 2 color diagrams (2-CDs) to identify candidate Be star populations in these clusters.…

Astrophysics · Physics 2011-02-11 John P. Wisniewski , Karen S. Bjorkman , ;

In this study, we present a comprehensive analysis of the structural, astrophysical, and dynamical properties of eight open clusters: NGC 559, NGC 1817, NGC 2141, NGC 7245, Ruprecht 15, Ruprecht 137, Ruprecht 142, and Ruprecht 169, using…

Astrophysics of Galaxies · Physics 2026-02-04 A. Ahmed , W. H. Elsanhoury , D. C. Çınar , A. A. Haroon , M. S. Alenazi , E. A. Alkholy

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

Blue straggler stars (BSS), one of the most massive members of star clusters, have been used for over a decade to investigate mass segregation and estimate the dynamical ages of globular clusters (GCs) and open clusters (OCs). This work is…

Astrophysics of Galaxies · Physics 2023-09-07 Khushboo K. Rao , Kaushar Vaidya , Manan Agarwal , Shanmugha Balan , Souradeep Bhattacharya

We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated…

Solar and Stellar Astrophysics · Physics 2015-06-24 Tali Palma , Juan J. Clariá , Doug Geisler , Luciana V. Gramajo , Andrea V. Ahumada

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

We report the discovery of three optical open clusters in the Milky Way. Two clusters are in Scutum (Cluster1 at l=18.44 degrees and b=-0.42 degrees, and Cluster2 at l=19.60 degrees and b=-1.02 degrees), thus projected not far from the…

Astrophysics · Physics 2009-11-10 E. Bica , C. Bonatto , C. M. Dutra

We present results of a study of the galactic open cluster population based on the all-sky catalogue ASCC-2.5 (I/280A) compiled from Tycho-2, Hipparcos and other catalogues. The sample of optical clusters from ASCC-2.5 is complete up to…

Astrophysics · Physics 2009-11-11 A. E. Piskunov , N. V. Kharchenko , S. Röser , E. Schilbach , R. -D. Scholz

In some scenarios for the formation of the Milky Way bulge the stellar population at the edges of the boxy bulge may be younger than those on the minor axis, or close to the Galactic center. So far the only bulge region where deep…

Astrophysics of Galaxies · Physics 2015-06-17 E. Valenti , M. Zoccali , A. Renzini , T. M. Brown , O. Gonzalez , D. Minniti , Victor P. Debattista , L. Mayer
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