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Related papers: Structural parameters of 389 local Open Clusters

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We present a review of the present state of knowledge regarding the relative ages of Galactic globular clusters. First, we discuss the relevant galaxy formation models and describe the detailed predictions they make with respect to the…

Astrophysics · Physics 2016-08-30 Ata Sarajedini , Brian Chaboyer , Pierre Demarque

The gravitational interactions between the Milky Way and in-falling satellites offer a wealth of information about the formation and evolution of our Galaxy. In this paper, we explore the high-dimensionality of the GALAH DR3 plus Gaia eDR3…

Astrophysics of Galaxies · Physics 2023-07-12 Kris Youakim , Karin Lind , Iryna Kushniruk

The relationship between young stellar clusters and respective parental molecular clouds is still an open issue: for instance, are the similarities between substructures of clouds and clusters just a coincidence? Or would they be the…

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…

Thanks to the recent wide-area photometric surveys, the number of star cluster candidates have risen exponentially in the last few years. Most detections, however, are based only on the presence of an overdensity of stars in a given region,…

Stars form predominantly in groups which display a broad spectrum of masses, sizes, and other properties. Despite this diversity there exist an underlying structure that can constrain cluster formation theories. We show how combining…

Astrophysics of Galaxies · Physics 2020-03-18 Susanne Pfalzner

We use the framework developed as part of the MESA Isochrones and Stellar Tracks (MIST) project to assess the utility of several types of observables in jointly measuring the age and 1D stellar model parameters in star clusters. We begin…

Solar and Stellar Astrophysics · Physics 2018-08-15 Jieun Choi , Charlie Conroy , Yuan-Sen Ting , Phillip A. Cargile , Aaron Dotter , Benjamin D. Johnson

Very precise observational data are needed for studying the stellar cluster parameters (distance, reddening, age, metallicity) and cluster internal kinematics. In turn, these give us an insight into the properties of our Galaxy, for…

Astrophysics of Galaxies · Physics 2021-07-16 Martin Piecka , Ernst Paunzen

In our previous work, we introduced a method that combines two unsupervised algorithms: DBSCAN and GMM. We applied this method to 12 open clusters based on Gaia EDR3 data, demonstrating its effectiveness in identifying reliable cluster…

Astrophysics of Galaxies · Physics 2024-06-18 Mohammad Noormohammadi , Mehdi Khakian Ghomi , Atefeh Javadi

We have initiated a long-term project, the BOAO photometric survey of open clusters, to enlarge our understanding of galactic structure using UBVI CCD photometry of open clusters which have been little studied before. This is the second…

Astrophysics · Physics 2009-11-07 H. B. Ann , S. H. Lee , H. Sung , M. G. Lee , S. -L. Kim , M. -Y. Chun , Y. -B. Jeon , B. -G. Park , I. -S. Yuk

To distinguish between the different theories proposed to explain massive star formation, it is crucial to establish the distribution, the extinction, and the density of low-mass stars in massive star-forming regions. We analyze deep X-ray…

Astrophysics of Galaxies · Physics 2015-06-15 V. M. Rivilla , J. Martin-Pintado , I. Jimenez-Serra , A. Rodriguez-Franco

Context: The Canis Major (CMa) star-forming region, a remote molecular cloud complex within the recently discovered Radcliffe Wave, remains under-explored in the literature. Aims: We revisit the stellar census in the CMa region,…

We analyze the physical properties of stellar clusters that are detected in massive star-forming regions in the MYStIX project--a comparative, multiwavelength study of young stellar clusters within 3.6 kpc that contain at least one O-type…

We use archival {\it Hubble Space Telescope} observations of broad-band images from the ultraviolet (F255W-filter) through the near infrared (NICMOS F160W-filter) to study the star cluster population of the interacting spiral galaxy M51. We…

Astrophysics · Physics 2009-11-10 N. Bastian , M. Gieles , H. J. G. L. M. Lamers , R. de Grijs , R. A. Scheepmaker

Based on the most complete sample of Galactic open star clusters up to 1.8 kpc, we performed statistical analysis of the distribution of open cluster parameters in order to understand the Galactic structure. The geometrical characteristics…

Astrophysics of Galaxies · Physics 2017-07-31 Yogesh C. Joshi

Our general understanding of multiple star and planet formation is primarily based on observations of young multiple systems in low density regions like Tau-Aur and Oph. Since many, if not most, of the stars are born in clusters,…

Solar and Stellar Astrophysics · Physics 2015-06-16 S. Correia , G. Duchene , B. Reipurth , H. Zinnecker , S. Daemgen , M. G. Petr-Gotzens , R. Koehler , Th. Ratzka , C. Aspin , Q. M. Konopacky , A. M. Ghez

Open clusters are key targets for both Galaxy structure and evolution and stellar physics studies. Since \textit{Gaia} DR2 publication, the discovery of undetected clusters has proven that our samples were not complete. Our aim is to…

The high-quality OmegaCAM photometry of the 3x3 deg around the Orion Nebula Cluster (ONC) in r, and i filters by Beccari et al.(2017) revealed three well-separated pre-main sequences in the color-magnitude diagram (CMD). The objects…

Previous studies of open clusters have shown that lithium depletion is not only strongly age dependent but also shows a complex pattern with other parameters that is not yet understood. For pre- and main-sequence late-type stars, these…