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The VISTA Variables in the Via L\'actea Extended Survey (VVVX) enables exploration of previously uncharted territories within the inner Milky Way (MW), particularly those obscured by stellar crowding and intense extinction. Our objective is…

星系天体物理 · 物理学 2024-09-11 Saroon S , Bruno Dias , Dante Minniti , M. C. Parisi , Matías Gómez , Javier Alonso-García

In this third paper of a series, we study the kinematics of the ionised gas and stars, calculating the dynamical masses of the circumnuclear star-forming regions in the ring of of the face-on spiral NGC 7742. We have used high spectral…

星系天体物理 · 物理学 2025-04-02 S. Zamora , A. I. Díaz , Roberto Terlevich , Elena Terlevich , R. Amorín

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 stellar populations in the inner kiloparsecs of the Milky Way (MW) show complex kinematical and chemical structures. The origin and evolution of these structures is still under debate. Here we study the central region of a fully…

星系天体物理 · 物理学 2019-04-03 Tobias Buck , Melissa Ness , Aura Obreja , Andrea V. Macciò , Aaron A. Dutton

This is the first of a series of papers devoted to the investigation of a large sample of brightest cluster galaxies (BCGs), their kinematic and stellar population properties, and the relationships between those and the properties of the…

天体物理学 · 物理学 2009-11-13 S. I. Loubser , A. E. Sansom , P. Sanchez-Blazquez , I. K. Soechting , G. E. Bromage

We present kinematical analyses of 22 Galactic globular clusters using the Hubble Space Telescope proper motion (HSTPROMO) catalogues recently presented in Bellini et al. (2014). For most clusters, this is the first proper-motion study ever…

星系天体物理 · 物理学 2015-06-23 Laura L. Watkins , Roeland P. van der Marel , Andrea Bellini , Jay Anderson

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…

星系天体物理 · 物理学 2021-01-06 Roger E. Cohen , Andrea Bellini , Mattia Libralato , Matteo Correnti , Thomas M. Brown , Jason S. Kalirai

The inner ~200 pc region of the Milky Way contains a nuclear stellar disc and a nuclear star cluster that are embedded in the larger Galactic bar. These stellar systems overlap spatially, which makes it challenging to separate stars that…

星系天体物理 · 物理学 2025-07-16 A. Feldmeier-Krause , T. Veršič , G. van de Ven , E. Gallego-Cano , N. Neumayer

We apply the clustering algorithm HDBSCAN on the Gaia early third data release astrometry combined with the Gaia second data release radial velocity measurements of almost 5.5 million stars to identify the local stellar kinematic…

星系天体物理 · 物理学 2023-03-15 Xiaowei Ou , Lina Necib , Anna Frebel

Recent high-resolution observations with the Hubble Space Telescope (HST) reveal that star clusters of extraordinary luminosity and compactness are commonly found in a variety of starburst systems. There has been much speculation that these…

天体物理学 · 物理学 2009-10-28 Luis C. Ho , Alexei V. Filippenko

Between 1996 and 2003 we have obtained 226 high resolution spectra of 16 stars in the field of the young open cluster NGC 6913, to the aim of constraining its main properties and study its internal kinematics. Twelve of the program stars…

天体物理学 · 物理学 2009-11-10 C. Boeche , U. Munari , L. Tomasella , R. Barbon

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…

天体物理学 · 物理学 2009-11-13 Peter M. Frinchaboy , Steven R. Majewski

Although they are the main constituents of the Galactic disk population, for half of the open clusters in the Milky Way reported in the literature nothing is known except the raw position and an approximate size. The main goal of this study…

星系天体物理 · 物理学 2015-06-17 N. V. Kharchenko , A. E. Piskunov , E. Schilbach , S. Röser , R. -D. Scholz

HIRES on the Keck I telescope has been used to measure the first radial velocities for stars belonging to eleven, heavily-reddened globular clusters in the direction of the inner Galaxy. The question of kinematic substructuring among the…

天体物理学 · 物理学 2011-03-28 Patrick Cote

We use kinematical and chemical properties of 754 Corot stars to characterise the stellar populations of the Milky Way disc in three beams close the Galactic plane. From the atmospheric parameters derived in Gazzano et al. (2010) with the…

星系天体物理 · 物理学 2015-06-12 J. -C. Gazzano , G. Kordopatis , M. Deleuil , P. de Laverny , A. Recio-Blanco , V. Hill

(ABRIDGED) Recent near-IR surveys have uncovered a plethora of new globular cluster (GC) candidates towards the Milky Way bulge. These new candidates need to be confirmed as real GCs and properly characterised. We investigate the physical…

We employ Gaia DR2 proper motions for 151 Milky Way globular clusters from Vasiliev (2019) in tandem with distances and line-of-sight velocities to derive their kinematical properties. To assign clusters to the Milky Way thick disk, bulge,…

星系天体物理 · 物理学 2020-06-03 A. T. Bajkova , G. Carraro , V. I. Korchagin , N. O. Budanova , V. V. Bobylev

We present a kinematic study of the Orion Nebula Cluster based upon radial velocities measured by multi-fiber echelle spectroscopy at the 6.5 meter MMT and Magellan telescopes. Velocities are reported for 1613 stars, with multi-epoch data…

太阳与恒星天体物理 · 物理学 2011-02-11 J. J. Tobin , L. Hartmann , G. Furesz , M. Mateo , S. T. Megeath

Star clusters are invaluable tracers of the Galactic components and the discovery and characterization of low-mass stellar systems can be used to appraise their prevailing disruption mechanisms and time scales. However, owing to the…

星系天体物理 · 物理学 2017-09-27 Andreas Koch , Andrea Kunder , Jennifer Wojno

We collected radial velocities of more than 50.000 individual stars in 156 Galactic globular clusters (GGC) and matched them with HST photometry and Gaia DR2 proper motions. This allowed us to derive the GGC's mean proper motions and space…

星系天体物理 · 物理学 2020-03-18 Michael Hilker , Holger Baumgardt , Antonio Sollima , Andrea Bellini
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