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The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of these two galaxies from both the Hubble Space Telescope's Wide…

天体物理学 · 物理学 2009-10-30 Duncan Forbes , Carl Grillmair , Gerard Williger , R. Elson , Jean Brodie

The global properties of all known Galactic globular clusters are examined. The relationship between the luminosities and the metallicities of Galactic globular clusters is found to be complex. Among luminous clusters there is a correlation…

星系天体物理 · 物理学 2015-05-30 Sidney van den Bergh

We report the results of an expanded search for z~9-10 candidates over the ~883 arcmin^2 CANDELS+ERS fields. This study adds 147 arcmin^2 to the search area we consider over the CANDELS COSMOS, UDS, and EGS fields, while expanding our…

We have obtained a mosaic of CCD images of the Coma cluster in the V-band covering a region of approximately 0.4 degrees$^2$ around both central cluster galaxies NGC 4889 and NGC 4874. An additional frame of $\sim$ 90 arcmin$^2$ was taken…

天体物理学 · 物理学 2016-08-30 C. Lobo , A. Biviano , F. Durret , D. Gerbal , O. Le Fèvre , A. Mazure , E. Slezak

This paper is the second of a series that tackles the properties of molecular gas in galaxies residing in clusters and their related large-scale structures. Out of 21 targeted fields, 19 galaxies were detected in CO(3-2) with the Atacama…

We present two new catalogues of superclusters of galaxies out to a redshit of z = 0.15, based on the Abell/ACO cluster redshift compilation maintained by one of us (HA). The first of these catalogues, the all-sky Main SuperCluster…

宇宙学与河外天体物理 · 物理学 2015-06-22 M. Chow-Martínez , H. Andernach , C. A. Caretta , J. J. Trejo-Alonso

We present two catalogues of galaxies in the direction of the rich cluster Abell 496. The first one includes 3,879 galaxies located in a region of roughly 1.3 degrees from the cluster centre. It has been obtained from a list of more than…

天体物理学 · 物理学 2017-03-22 Eric Slezak , Florence Durret , Jean Guibert , Catarina Lobo

We present the results of combining Hubble Space Telescope optical photometry with ground-based Ks-band photometry from the Gemini imagers NIRI and FLAMINGOS-I to study the globular-cluster populations in four early-type galaxies that are…

星系天体物理 · 物理学 2015-06-22 Gelys Trancho , Bryan W. Miller , Francois Schweizer , Daniel P. Burdett , David Palamara

Observational studies of ultra-diffuse galaxies (UDGs) represent a significant challenge because of their very low surface brightnesses. A feasible approach is to identify "future" UDGs when their stars are still young. Using data mining,…

星系天体物理 · 物理学 2019-10-01 Kirill A. Grishin , Igor V. Chilingarian , Anton V. Afanasiev , Ivan Yu. Katkov

We use deep \textit{Hubble Space Telescope} spectroscopy to constrain the metallicities and (\editone{light-weighted}) ages of massive ($\log M_\ast/M_\odot\gtrsim10$) galaxies selected to have quiescent stellar populations at $1.0<z<1.8$.…

The whole Sloan Digital Sky Survey (SDSS, 14,555 deg^2 has been searched for intergalactic globular clusters (IGCs) in the Local Group (LG). Using optical, infrared, and ultraviolet photometric selection criteria and photometric redshifts,…

星系天体物理 · 物理学 2015-06-24 Graziella di Tullio Zinn , Robert Zinn

We have identified 26 new globular cluster candidates in the inner 3 kpc of NGC 5128 (Cen A), the nearest known large galaxy being the probable product of a merger. The clusters are selected on the basis of their structural parameters…

天体物理学 · 物理学 2009-10-28 D. Minniti , M. V. Alonso , P. Goudfrooij , P. Jablonka , G. Meylan

We present the first high spectral resolution abundance analysis of two newly discovered Galactic globular clusters, namely Mercer 5 and 2MASS GC02 residing in regions of high interstellar reddening in the direction of the Galactic center.…

太阳与恒星天体物理 · 物理学 2015-06-23 Francisco Penaloza , Peter Pessev , Sergio Vasquez , Jura Borissova , Radostin Kurtev , Manuela Zoccali

We present the first high-resolution abundance analysis of the globular cluster VVV~CL001, which resides in a region dominated by high interstellar reddening towards the Galactic Bulge. Using \textit{H}-band spectra acquired by the Apache…

We perform integrated spectroscopy of 24 Galactic globular clusters. Spectra are observed from one core radius for each cluster with a high wavelength resolution of ~2.0 A FWHM. In combination with two existing data sets from Puzia et al.…

星系天体物理 · 物理学 2016-12-14 Hak-Sub Kim , Jaeil Cho , Ray M. Sharples , Alexandre Vazdekis , Michael A. Beasley , Suk-Jin Yoon

In this second paper of the catalogue series of galaxies behind the southern Milky Way, we report on the deep optical galaxy search in the Crux region (289deg <= l <= 318deg and -10deg <= b <= 10deg) and the Great Attractor region (316deg…

天体物理学 · 物理学 2009-11-07 Patrick A. Woudt , Renee C. Kraan-Korteweg

We present a catalogue of low surface brightness (LSB) galaxies in the Coma cluster obtained from deep Subaru/Suprime-Cam V and R-band imaging data within a region of $\sim$4 deg$^2$. We increase the number of LSB galaxies presented in Yagi…

星系天体物理 · 物理学 2020-06-18 Adebusola B. Alabi , Aaron J. Romanowsky , Duncan A. Forbes , Jean P. Brodie , Nobuhiro Okabe

We carry out a joint spatial-kinematical-metallicity analysis of globular clusters (GCs) around the Andromeda Galaxy (M31), using a homogeneous, high-quality spectroscopic dataset. In particular, we remove the contaminating young clusters…

星系天体物理 · 物理学 2016-06-15 Nelson Caldwell , Aaron J. Romanowsky

We report the discovery of a galaxy proto-cluster candidate (dubbed MACS0416-OD-z8p5) at a spectroscopic redshift of $z\sim8.47$, dating back to $\sim550$Myr after the Big Bang. The observations are part of the JWST Cycle-3 treasury…