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NGC 6791 is a unique stellar system among Galactic open clusters being at the same time one of the oldest open clusters and the most metal rich. Combination of its properties is puzzling and poses question of its origin. One possible…

Astrophysics of Galaxies · Physics 2012-05-01 L. Jilkova , G. Carraro , B. Jungwiert , I. Minchev

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

Context. Star clusters constitute a significant part of the stellar population in our Galaxy. The feedback processes they exert on the interstellar medium impact multiple physical processes from the chemical to the dynamical evolution of…

Astrophysics of Galaxies · Physics 2025-01-20 Silvia Celli , Andreas Specovius , Stefano Menchiari , Alison Mitchell , Giovanni Morlino

We present V-band surface photometry and major-axis kinematics of stars and ionized gas of three early-type spiral galaxies, namely NGC 772, NGC 3898 and NGC 7782. For each galaxy we built a self-consistent Jeans model for the stellar…

Context. Traditionally, Globular Clusters (GCs) have been assumed to be quasi-relaxed non-rotating systems, characterized by spherical symmetry and orbital isotropy. However, in recent years, a growing set of observational evidence is…

Astrophysics of Galaxies · Physics 2024-08-23 Ilaria Petralia , Dante Minniti , José G. Fernández-Trincado , Richard R. Lane , Ricardo P. Schiavon

This study constitutes part of a larger effort aimed at better characterizing the Galactic globular clusters (GGCs) located towards the inner Milky Way bulge and disk. Here, we focus on internal kinematics of nine GGCs, obtained from…

Astrophysics of Galaxies · Physics 2021-01-06 Roger E. Cohen , Andrea Bellini , Mattia Libralato , Matteo Correnti , Thomas M. Brown , Jason S. Kalirai

We present the kinematic analysis of $246$ stars within $4\mbox{$^\prime$}$ from the center of Orion Nebula Cluster (ONC), the closest massive star cluster with active star formation across the full mass range, which provides valuable…

Astrophysics of Galaxies · Physics 2025-05-23 Lingfeng Wei , Christopher A. Theissen , Quinn M. Konopacky , Jessica R. Lu , Chih-Chun Hsu , Dongwon Kim

The formation of high mass stars and clusters occurs in giant molecular clouds. Objects in evolved stages of massive star formation such as protostars, hot molecular cores, and ultracompact HII regions have been studied in more detail than…

To understand the processes that build up galaxies we investigate the stellar structure and gas kinematics of spiral and irregular galaxies out to redshift 1. We target 92 galaxies in four cluster (z = 0.3 & 0.5) fields to study the…

Cosmology and Nongalactic Astrophysics · Physics 2009-09-17 Bodo L. Ziegler , Elif Kutdemir , Cristiano Da Rocha , Asmus Böhm , Reynier F. Peletier , Miguel Verdugo

We study the effect of dynamical friction on globular clusters and on the stars evaporated from the globular clusters (stellar streams) moving in a galactic halo. Due to dynamical friction, the position of a globular cluster (GC) as a…

Astrophysics of Galaxies · Physics 2019-05-22 Rain Kipper , Peeter Tenjes , Gert Hütsi , Taavi Tuvikene , Elmo Tempel

We perform analysis of the three-dimensional kinematics of Milky Way disk stars in mono-age populations. We focus on stars between Galactocentric distances of $R=6$ and 14 \,kpc, selected from the combined LAMOST DR4 red clump giant stars…

In this paper, we have used the Gaia's Data Release-3 (DR3) data to study an intermediate-age open cluster Berkeley 27 (Be 27). A total of 131 most probable cluster members are picked within the cluster's radius based on the membership…

Astrophysics of Galaxies · Physics 2022-10-12 Devesh P. Sariya , Ing-Guey Jiang , D. Bisht , R. K. S. Yadav , G. Rangwal

We investigate two neighboring clusters in the Cygnus complex, Berkeley 86 and Berkeley 87, with a primary emphasis on the evaluation of extinction in the field of view towards and across the clusters. We also analyze their kinematic…

Astrophysics of Galaxies · Physics 2026-04-10 S. Raudeliūnas , R. P. Boyle , R. Janusz , J. Zdanavičius , M. Maskoliūnas , D. Semionov , K. Černis , V. Čepas , A. Kazlauskas

Aims:We take advantage of the second data release of the Gaia space mission and the state-of-the-art astrometry delivered from very long baseline interferometry observations to revisit the structure and kinematics of the nearby Taurus…

Spectroscopy from the final internal data release of the Gaia-ESO Survey (GES) has been combined with Gaia EDR3 to assign membership probabilities to targets observed towards 63 Galactic open clusters and 7 globular clusters. The membership…

We present a detailed photometric and kinematical analysis of poorly studied open cluster IC 1434 using CCD VRI, APASS, and Gaia DR2 database for the first time. BY determining the membership probability of stars, we identified the 238 most…

Solar and Stellar Astrophysics · Physics 2021-09-29 Y. H. M. Hendy , D. Bisht

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…

The study of the kinematics of globular clusters (GCs) offers the possibility of unveiling their long term evolution and uncovering their yet unknown formation mechanism. Gaia DR2 has strongly revitalized this field and enabled the…

Astrophysics of Galaxies · Physics 2020-03-18 P. Bianchini

We present the first full six-dimensional panoramic portrait of the Sagittarius stream, obtained by searching for wide stellar streams in the Gaia DR2 dataset with the STREAMFINDER algorithm. We use the kinematic behavior of the sample to…

We have begun a survey of the chemical and dynamical properties of the Milky Way disk as traced by open star clusters. In this first contribution, the general goals of our survey are outlined and the strengths and limitations of using star…

Astrophysics · Physics 2009-11-13 Peter M. Frinchaboy , Steven R. Majewski