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Stellar kinematics is a powerful tool for understanding the formation process of stellar associations. Here, we present a kinematic study of the young stellar population in the Rosette nebula using the recent Gaia data and high-resolution…

Solar and Stellar Astrophysics · Physics 2021-07-21 Beomdu Lim , Yael Naze , Jongsuk Hong , Byeong-Gon Park , Hyeong-Sik Yun , Hee-Weon Yi , Sunkyung Park , Narae Hwang , Jeong-Eun Lee

Measuring the distribution of stellar spin axis orientations in a coeval group of stars probes the physical processes underlying the stars' formation. In this paper, we use spectro-photometric observations of the open cluster NGC 2516 to…

Solar and Stellar Astrophysics · Physics 2020-11-09 Brian F. Healy , P. R. McCullough

The publication of the Gaia Data Release 2 (Gaia DR2) opens a new era in Astronomy. It includes precise astrometric data (positions, proper motions and parallaxes) for more than $1.3$ billion sources, mostly stars. To analyse such a vast…

Astrophysics of Galaxies · Physics 2018-10-17 A. Castro-Ginard , C. Jordi , X. Luri , F. Julbe , M. Morvan , L. Balaguer-Núñez , T. Cantat-Gaudin

A number of stellar open cluster (OC) pairs in the Milky Way occupy similar positions in the phase space (coordinates, parallax and proper motions) and therefore may constitute physically interacting systems. The characterization of such…

Astrophysics of Galaxies · Physics 2022-01-12 M. S. Angelo , J. F. C. Santos , F. F. S. Maia , W. J. B. Corradi

We have determined bulk proper motions (PMs) for 31 LMC GCs from Gaia eDR3 and Hubble Space Telescope data using multiple independent analysis techniques. Combined with literature values for distances, line-of-sight velocities and existing…

The Galactic population of open clusters provides an insight into star formation in the Galaxy. The open cluster catalogue by Dias et al.(2002b) is a rich source of data, including kinematic information. This large sample made it possible…

Astrophysics of Galaxies · Physics 2015-05-14 D. Vande Putte , T. P. Garnier , Ignacio Ferreras , R. P. Mignani , Mark Cropper

Stellar kinematic groups (SKG) are kinematically coherent groups of stars that share a common origin. We have compiled (Montes et al. 1999; 2000) a sample of late-type stars of previously established members and possible new candidates to…

Astrophysics · Physics 2016-08-30 D. Montes

We conducted a photometric and kinematic analysis of the young open cluster NGC 2345 using CCD \emph{UBV} data from 2-m Himalayan Chandra Telescope (HCT), \emph{Gaia} Data Release 3 (DR3), 2MASS, and the APASS datasets. We found 1732 most…

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…

Line-of-sight kinematic studies indicate that many Galactic globular clusters have a significant degree of internal rotation. However, three-dimensional kinematics from a combination of proper motions and line-of-sight velocities are needed…

Astrophysics of Galaxies · Physics 2018-09-05 P. Bianchini , R. P. van der Marel , A. del Pino , L. L. Watkins , A. Bellini , M. A. Fardal , M. Libralato , A. Sills

Context: Open clusters' dynamical evolution is driven by stellar evolution, internal dynamics and external forces, which according to dynamical simulations, will evaporate them in a timescale of about 1 Ga. However, about 10\% of the known…

Astrophysics of Galaxies · Physics 2024-07-03 N. Alvarez-Baena , R. Carrera , H. Thompson , L. Balaguer-Nuñez , A. Bragaglia , C. Jordi , E. Silva-Villa , A. Vallenari

The high-resolution setup of the AAOmega spectrograph on the Anglo-Australian Telescope makes it a beautiful radial velocity machine, with which one can measure velocities of up to 350-360 stars per exposure to +/-1--2 km/s in a 2-degree…

Astrophysics · Physics 2008-09-09 L. L. Kiss , Z. Balog , Gy. M. Szabo , Q. A. Parker , D. J. Frew

(Abridged) IC1396A is a cometary globule containing the Class 0 source IC1396A-PACS-1. We use IRAM 30m and Gaia DR2 data to explore the star-formation history of IC1396A and investigate the possibilities of triggered star formation. IRAM…

Solar and Stellar Astrophysics · Physics 2019-02-13 Aurora Sicilia-Aguilar , Nimesh Patel , Min Fang , Veronica Roccatagliata , Konstantin Getman , Paul Goldsmith

We report the discovery of a large, dynamically cold, coeval stellar stream that is currently traversing the immediate solar neighborhood at a distance of only 100 pc. The structure was identified in a wavelet decomposition of the 3D…

Astrophysics of Galaxies · Physics 2019-02-20 Stefan Meingast , João Alves , Verena Fürnkranz

The work on the kinematical parameters and spatial shape structure have been performed with Gaia DR2 astrometry data of the new recently southern discovered open clusters; UFMG 1, UFMG 2, and UFMG 3 in the vicinity (1.3 degrees radius) of…

Astrophysics of Galaxies · Physics 2020-03-11 W. H. Elsanhoury

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

In previous work, we developed a deep neural network classifier that only relies on phase-space information to obtain a catalog of accreted stars based on the second data release of Gaia (DR2). In this paper, we apply two clustering…

Astrophysics of Galaxies · Physics 2022-02-15 Lina Necib , Bryan Ostdiek , Mariangela Lisanti , Timothy Cohen , Marat Freytsis , Shea Garrison-Kimmel

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

We derived the three-dimensional velocities of individual stars in a sample of 62 Galactic globular clusters using proper motions from the second data release of the Gaia mission together with the most comprehensive set of line-of-sight…

Astrophysics of Galaxies · Physics 2019-02-27 A. Sollima , H. Baumgardt , M. Hilker

We constructed a Hubble Space Telescope (HST) astro-photometric catalog of the central region of the Galactic globular cluster NGC 1261. This catalog, complemented with Gaia DR2 data sampling the external regions, has been used to estimate…

Solar and Stellar Astrophysics · Physics 2020-05-27 S. Raso , M. Libralato , A. Bellini , F. R. Ferraro , B. Lanzoni , M. Cadelano , C. Pallanca , E. Dalessandro , G. Piotto , J. Anderson , S. T. Sohn