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We present low resolution, visible light spectra of 41 star clusters in the spiral galaxy M101, taken with the Gemini/GMOS instrument. We measure Lick indices for each cluster and compare with BaSTI models to estimate their ages and…

星系天体物理 · 物理学 2017-12-20 Lesley A. Simanton-Coogan , Rupali Chandar , Bryan Miller , Bradley C. Whitmore

Ten years after the publication of the previous release, we present a new edition of the Asiago Supernova Catalogue updated to December 31, 1998 and containing data for 1447 supernovae and their parent galaxies\footnote{Tables 1 and 2 are…

天体物理学 · 物理学 2009-10-31 R. Barbon , V. Buondi' , E. Cappellaro , M. Turatto

The VISTA Variables in the Via L\'actea Extended Survey (VVVX) allows probing previously unexplored regions of the inner Milky Way (MW). We are looking for new candidate globular clusters (GCs), with the aim of completing the census of the…

We present new deep photometry of the globular cluster system (GCS) around NGC 6166, the central supergiant galaxy in Abell 2199. HST data from the ACS and WFC3 cameras in F475W, F814W are used to determine the spatial distribution of the…

This paper discusses the galaxy populations of three rich clusters, with redshift 0.19 (0839+29), 0.24 (1231+15), and 0.32 (1224+20), from the database of the CNOC1 consortium. The data consist of spectra of 52 cluster members for 0839+29,…

天体物理学 · 物理学 2009-10-31 J. B. Hutchings , L. Edwards

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…

We present extensive observations of a sample of distant, submm galaxies detected in the field of the massive cluster lens, A1835, using SCUBA. Taken in conjunction with earlier observations of other submm-selected sources (Ivison et al.…

天体物理学 · 物理学 2009-10-31 Rob Ivison , Ian Smail , Amy Barger , Jean-Paul Kneib , Andrew Blain , Frazer Owen , Tom Kerr , Len Cowie

We aim to carry out a radio study of the SoUthern Cluster sCale Extended Source Survey (SUCCESS) sample consisting of twenty massive (M$_{500} > 5\times10^{14}$ M$_{\odot}$), nearby (redshift $<0.3$) and southern ($-50^{\circ} < \delta <…

宇宙学与河外天体物理 · 物理学 2022-06-23 R. Kale , V. Parekh , M. Rahaman , D. C. Joshi , T. Venturi , K. Kolokythas , J. O. Chibueze , S. Sikhosana , D. Pillay , K. Knowles

We present a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected…

宇宙学与河外天体物理 · 物理学 2014-03-05 A. Takey , A. Schwope , G. Lamer

We present a detailed analysis of the overdensity of X-ray sources colse to the 3C 295 galaxy cluster (z=0.46) to assess whether it is associated with a filament of the large-scale structure of the Universe. We obtained optical spectra of…

天体物理学 · 物理学 2009-11-13 Valerio D'Elia , Fabrizio Fiore , Smita Mathur , Filomena Cocchia

We performed K band surface photometry for luminous early-type galaxies in a nearby rich cluster ABELL 2199. Combining it with B and R band surface photometry, radial variations of B-R and R-K colours in the galaxies were investigated. It…

天体物理学 · 物理学 2009-11-10 Naoyuki Tamura , Kouji Ohta

We identify 47,600 clusters of galaxies from photometric data of Two Micron All Sky Survey (2MASS), Wide-field Infrared Survey Explorer (WISE), and SuperCOSMOS, among which 26,125 clusters are recognized for the first time and mostly in the…

星系天体物理 · 物理学 2018-01-31 Z. L. Wen , J. L. Han , F. Yang

This paper is part of a project to search the inner Milky Way for hidden massive clusters and to address the question of whether our Galaxy still forms clusters similar to the progenitors of the present-day globular clusters. We report high…

天体物理学 · 物理学 2009-11-10 J. Borissova , V. D. Ivanov , D. Minniti , D. Geisler , A. W. Stephens

We present the results of medium-resolution spectroscopy of 28 globular clusters (GCs) in six nearby galaxies of different luminosities and morphological types, situated in: M33 (15 objects), M31 (3), IC10 (4), UGCA86 (4), HolmbergIX (1),…

宇宙学与河外天体物理 · 物理学 2015-05-18 Margarita E. Sharina , Rupali Chandar , Thomas H. Puzia , Paul Goudfrooij , Emmanuel Davoust

We present the results from a new search for candidate galaxies at z ~ 8.5-11 discovered over the 850 arcmin^2 area probed by the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS). We use a photometric redshift…

The most prodigious starburst galaxies are absent in massive galaxy clusters today, but their connection with large scale environments is less clear at $z\gtrsim2$. We present a search of large scale structure around a galaxy cluster core…

A new calibration of the Stroemgren (b-y),m_1 diagram in terms of iron abundance of red giants is presented. This calibration is based on a homogeneous sample of giants in the globular clusters omega Centauri, M22, and M55 as well as field…

天体物理学 · 物理学 2007-05-23 Michael Hilker

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…