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We present photometry for the globular cluster NGC 6642 using the F606W and F814W filters with the ACS/WFC third generation camera on board of Hubble Space Telescope. The Colour Magnitude Diagram shows sources reaching ~ 6 mags below the…

Astrophysics of Galaxies · Physics 2015-05-13 E. Balbinot , B. X. Santiago , E. Bica , C. Bonatto

We recently published velocity measurements of luminous globular clusters in the galaxy NGC1052-DF2, concluding that it lies far off the canonical stellar mass - halo mass relation. Here we present a revised velocity for one of the globular…

Globular clusters (GCs) are the most ancient stellar systems in the Milky Way. Therefore, they play a key role in the understanding of the early chemical and dynamical evolution of our Galaxy. Around $40\%$ of them are placed within $\sim4$…

Astrophysics of Galaxies · Physics 2020-01-08 Angeles Pérez-Villegas , Beatriz Barbuy , Leandro Kerber , Sergio Ortolani , Stefano O. Souza , Eduardo Bica

We report the discovery of 34 new open clusters and candidates as a result of a systematic search carried out in 200 adjacent fields of 1x1 square degrees area projected towards the Galactic bulge, using Gaia DR2 data. The objects were…

Astrophysics of Galaxies · Physics 2021-02-10 Filipe A. Ferreira , W. J. B. Corradi , F. F. S. Maia , M. S. Angelo , J. F. C. Santos

We have selected a sample of 326 young $(\log t<8)$ open star clusters with the proper motions and distances calculated by various authors from Gaia DR2 data. The mean values of their line-of-sight velocities have also been taken from…

Astrophysics of Galaxies · Physics 2019-03-25 V. V. Bobylev , A. T. Bajkova

We present new velocities for 62 globular clusters in M104 (NGC 4594, the Sombrero Galaxy), 56 from 2dF on the AAT and 6 from Hydra on WIYN. Combined with previous data, we have a total sample of 108 M104 globular cluster velocities,…

Astrophysics · Physics 2015-06-24 Terry Bridges , Katherine Rhode , Steve Zepf , Ken Freeman

The main goal of our project is to obtain a complete picture of individual open clusters from homogeneous data and then search for correlations between their astrophysical parameters. The near-infrared JHKS photometric data from the…

Solar and Stellar Astrophysics · Physics 2011-07-27 Ł. Bukowiecki , G. Maciejewski , P. Konorski , A. Strobel

Globular clusters at the distance of M31 have apparent angular sizes of a few arcseconds. While many M31 GCs have been detected and studied from ground-based images, the high spatial resolution of HST allows much more robust detection and…

Astrophysics · Physics 2007-05-23 P. Barmby , J. P. Huchra

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…

Astrophysics of Galaxies · Physics 2024-09-11 Saroon S , Bruno Dias , Dante Minniti , M. C. Parisi , Matías Gómez , Javier Alonso-García

We study the quiescent ultra-diffuse galaxy FCC 224 in the Fornax cluster using Hubble Space Telescope (HST) imaging, motivated by peculiar properties of its globular cluster (GC) system revealed in shallower imaging. The surface brightness…

Galaxy formation and evolution is hierarchical. The most massive galaxies are thought to form their central regions early through violent dissipational processes, then grow inside-out by accreting smaller satellites. While widely supported,…

Astrophysics of Galaxies · Physics 2025-09-29 Haoran Dou , Hao Li , Hongxin Zhang , Heng Yu , Huiyuan Wang

After the second data release of Gaia, the number of new globular cluster candidates has increased importantly. However, most of them need to be properly characterised, both spectroscopically and photometrically, by means of radial…

We present deep F606W, F814W ACS photometry of the recently discovered globular cluster B514, the outermost known globular in the M31 galaxy. The cluster appears quite extended and member stars are unequivocally identified out to ~200 pc…

Astrophysics · Physics 2011-02-11 S. Galleti , L. Federici , M. Bellazzini , A. Buzzoni , F. Fusi Pecci

We used the Wide Field Planetary Camera 2 aboard the Hubble Space Telescope to search for globular clusters in the inner regions of the nearby giant elliptical galaxy NGC 5128. This galaxy is believed to be the product of a merger between a…

Astrophysics · Physics 2011-05-23 Stephen Holland , Pat Cote , James E. Hesser

In order to characterize 22 new globular cluster (GC) candidates in the Galactic bulge, we present their colour-magnitude diagrams (CMDs) and Ks-band luminosity functions (LFs) using the near-infrared VVV database as well as Gaia-DR2 proper…

We present the results of a photometric and spectroscopic survey of the globular cluster system of NGC 5128 (Centaurus A), a galaxy whose proximity makes it an important target for early-type galaxy studies. We imaged three fields in UBVRI…

Astrophysics · Physics 2009-11-10 Eric W. Peng , Holland C. Ford , Kenneth C. Freeman

We discuss the main properties of the Galactic globular cluster (GC) blue straggler stars (BSS), as inferred from our new catalog containing nearly 3000 BSS. The catalog has been extracted from the photometrically homogeneous V vs. (B-V)…

The estimated total number of Milky Way globulars is 160+-20. The question of whether there are any more undiscovered globular clusters in the Milky Way is particularly relevant with advances in near and mid-IR instrumentation. This…

Astrophysics · Physics 2009-11-13 R. Kurtev , V. D. Ivanov , J. Borissova , S. Ortolani

We present a catalog of 4780 extended sources from the outer field of M33. The catalog includes 73 previously identified clusters or planetary nebulae, 1153 likely background galaxies, and 3554 new candidate stellar clusters. The survey is…

Astrophysics · Physics 2008-05-29 K. Zloczewski , J. Kaluzny , J. Hartman

We study the globular cluster (GC) systems in three representative fossil group galaxies: the nearest (NGC6482), the prototype (NGC1132) and the most massive known to date (ESO306-017). This is the first systematic study of GC systems in…

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