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The stellar [$\alpha$/Fe] abundance is sometimes used as a proxy for stellar age, following standard chemical evolution models for the Galaxy, as seen by different observational results. In this work we show that the Open Cluster…

We present the results of CCD UBVRI observations of the open cluster NGC 6811 obtained on 18th July 2012 with the 1m telescope at the T\"UB\.ITAK National Observatory (TUG). Using these photometric results, we determine the structural and…

Astrophysics of Galaxies · Physics 2016-08-10 T. Yontan , S. Bilir , Z. F. Bostancı , T. Ak , S. Karaali , T. Güver , S. Ak , S. Duran , E. Paunzen

We present a kinematic and dynamical analysis of six Galactic open clusters NGC~2204, NGC~2660, NGC~2262, Czernik~32, Pismis~18, and NGC~2437, using \textit{Gaia}~DR3. We used Bayesian and Gaussian Mixture Model (GMM) methods to identify…

The spatial distribution of exoplanets in the Galaxy is important for our understanding of planet formation and evolution. We aim to determine the spatial gradients of exoplanet occurrence in the Solar neighbourhood and in the vicinity of…

Earth and Planetary Astrophysics · Physics 2020-02-26 Andrii Maliuk , Jan Budaj

From $uvby-\beta$ photometry of the open clusters NGC 6811 (75 stars), and NGC 6830 (19 stars) we were able to determine membership of the stars to each cluster, and fix the age and reddening for each. Since several short period stars have…

Solar and Stellar Astrophysics · Physics 2011-06-14 J. H. Pena , L. Fox Machado , H. Garcia , A. Renteria , S. Skinner , A. Espinosa , E. Romero

We use 2MASS photometry to study colour-magnitude and colour-colour diagrams, structure and mass distribution in the ionizing open cluster NGC\,6611. Reddening variation throughout the cluster region is taken into account followed by…

Astrophysics · Physics 2009-11-13 C. Bonatto , J. F. C. Santos Jr. E. Bica

We present the first evidence of clear signatures of tidal distortions in the density distribution of the fascinating open cluster NGC 6791. We used deep and wide-field data obtained with the Canada-France-Hawaii-Telescope covering a 2x2…

Solar and Stellar Astrophysics · Physics 2015-06-24 E. Dalessandro , P. Miocchi , G. Carraro , L. Jilkova , A. Moitinho

UBVRI CCD photometry of a $2.^{\prime}1 \times 3.^{\prime}3$ field centered on the young open cluster Haffner~18 is presented and discussed. Spectroscopic classification of seven stars is also provided. 44 clusters members are identified,…

Astrophysics · Physics 2009-10-30 Ulisse Munari , Giovanni Carraro , Roberto Barbon

We present CCD UBVI observations obtained in the field of the two previously unstudied dissolving open cluster candidates NGC 7036 and NGC 7772. Our analysis suggests that both the objects are Open Cluster Remnants (OCR). NGC 7036 is an…

Astrophysics · Physics 2009-11-07 Giovanni Carraro

Gyrochronology allows the derivation of ages for cool main sequence stars based on their observed rotation periods and masses, or a suitable proxy thereof. It is increasingly well-explored for FGK stars, but requires further measurements…

Solar and Stellar Astrophysics · Physics 2020-11-25 David Gruner , Sydney A. Barnes

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 report the serendipitous discovery of three new open clusters, named UFMG 1, UFMG 2 and UFMG 3 in the field of the intermediate-age cluster NGC 5999, by using Gaia DR2 data. A colour-magnitude filter tailored for a proper selection of…

Astrophysics of Galaxies · Physics 2019-01-09 Filipe A. Ferreira , J. F. C. Santos , W. J. B. Corradi , F. F. S. Maia , M. S. Angelo

We report a detailed investigation of three intermediate-to-old age open clusters, Berkeley 17, Berkeley 18, and Berkeley 39, utilizing precise astrometric and photometric data from Gaia DR3. Cluster membership was robustly determined…

Astrophysics of Galaxies · Physics 2026-01-22 A. Ahmed , W. H. Elsanhoury , D. C. Çınar , S. Taşdemir , R. Canbay , A. A. Haroon , M. S. Alenazi

In this study, we investigate the fundamental astrophysical parameters of the old open cluster NGC 188 through two complementary methods: isochron-fitting and spectral energy distribution (SED) analysis. Using photometric, astrometric, and…

Astrophysics of Galaxies · Physics 2024-12-11 Deniz Cennet Dursun , Seval Taşdemir , Seliz Koç , Srishti İyer

We present and discuss new photometric data obtained with an IR camera in the J and K pass-bands for the intermediate age open clusters IC 166 (936 stars in total) and NGC 7789 (1030 stars in total). Ic 166 is a poorly studied open cluster…

Astrophysics · Physics 2007-05-23 Antonella Vallenari , Giovanni Carraro , Andrea Richichi

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

We have obtained BVI CCD imaging of Berkeley 17, an anticentre open cluster that competes with NGC 6791 as the oldest known open cluster. Using the synthetic colour magnitude diagrams (CMD) technique with three sets of evolutionary tracks…

Astrophysics · Physics 2009-11-11 Angela Bragaglia , Monica Tosi , Gloria Andreuzzi , Gianni Marconi

Context. Stellar physical properties of star clusters are poorly known. Aims. Our goals are to perform a spectrophotometric study of the B star population in open clusters to derive accurate stellar parameters, search for the presence of…

Solar and Stellar Astrophysics · Physics 2018-02-21 Y. Aidelman , L. S. Cidale , J. Zorec , J. A. Panei

(Abridged) The present number of Galactic Open Clusters that have high-resolution abundance determinations, not only of [Fe/H], but also of other key elements, is largely insufficient to enable a clear modeling of the Galactic Disk chemical…

Astrophysics of Galaxies · Physics 2015-05-14 E. Pancino , R. Carrera , E. Rossetti , C. Gallart

Our goal is to perform in-depth ensemble asteroseismology of the young open cluster NGC2244 with the 2-wheel Kepler mission. While the nominal Kepler mission already implied a revolution in stellar physics for solar-type stars and red…