... Decelerating and Dustfree: Efficient Dark Energy Studies with Supernovae and Clusters . Abstract . ... The Onset of Star Formation in the Universe: Constraints from Nearby Isolated Dwarf Galaxies . ... An ACS SNAPshot Survey . ... A Snapshot Survey of Brightest Cluster Galaxies and Strong Lensing to z = 0.9 . ... ACS survey observations of eight clusters are scheduled for the coming week, together with follow-up NICMOS observations of a supernova detected in previous ACS images. ... Past weeks: . ...

Еще в разделе: (Показать все результаты (>21768) - www.stsci.edu/ )

• HST this week: 015
• HST this week: 335
• HST this week: 282

... Chandra Observation of DEEP2 Galaxy Groups and Clusters . ... Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution . ... Statistics of galaxy groups in ultradeep XMM surveys. ... What can multiwavelength observations tell about cluster/group formation as well as galaxy evolution? ... I will present results from a Chandra study of eight low-redshift clusters that has systematically measured the AGN fraction in clusters and describe their spatial, kinematic, and host galaxy...

Еще в разделе: (Показать все результаты (>4564) - hea-www.harvard.edu/ )

• The AstroStat Slog Blog Archive [ArXiv] Bimodal Color Distribution in GCS,
• The Chandra Multiwavelength Project (ChaMP)
• Intern Directory

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm Observations . ... Data Handling and Products . ... ESO Data . ... Studies of the Planck data set with optical and sub-mm follow-up observations give new insights about the early assembly of the first clusters, and the later evolution of their gas content as well as of their population of star-forming galaxies. ...

Еще в разделе: (Показать все результаты (>66681) - www.eso.org/ )

• ESO - Thesis Topic: Studying the first galaxy clusters with ALMA
• ESO - Thesis Topic: Next generation Fornax Cluster surveys
• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations

The radial distribution of metallicity of star-forming galaxies in a galaxy cluster can inform us about the mass assembly and enrichment history of the galaxy cluster. ... Both galaxy clusters are cool-core clusters at redshift z т?? ... The gas-phase metallicity of star- forming galaxies in MACS1115+01 exhibit anti-correlation with projected distance т??0.15 ТБ 0.08 dex/Mpc, whereas the radial metallicity distribution of RXJ1532+30 is statistically flat (т??0.09 ТБ 0.12 dex/Mpc). ...

Еще в разделе: (Показать все результаты (>736) - www.mso.anu.edu.au/ )

• COALA - Computational Astrophysics Laboratory

... Explanation: How do you calibrate a huge gravitational lens? In this case the lens is the galaxy cluster Abell 383 , a massive conglomeration of galaxies, hot gas, and dark matter that lies about 2.5 billion light years away ( redshift z=0.187). ... This technique compl e ments other measures including computing the dark matter needed to contain internal galaxy motions , to confine cluster hot gas , and to create the gravitational lens image distortions. ... The Hercules Cluster of Galaxies . ...

Еще в разделе: (Показать все результаты (>118994) - www.astronet.ru/ )

• The Hydra Cluster of Galaxies
• The El Gordo Massive Galaxy Cluster
• Abell 2744: Pandoras Cluster of Galaxies

... 2.3 Establishing the Extragalactic Distance Scale . ... 2.3.2 The Second Rung: Distances to stellar clusters . ... 2.3.4 Distances to Local Group Galaxies . ... The Luminosity Function of Planetary Nebulae . ... 3.2.2 Clusters of Galaxies . ... 4.2 Evidence for Dark Matter as a Function of Scale Size . ... 4.3 Other Dark Matter Indicators for Galaxies . ... What is the nature of the large-scale distribution of matter in the universe as traced by the three-dimensional galaxy distribution? ...

Еще в разделе: (Показать все результаты (>447) - zebu.uoregon.edu/ )

• Evidence for Dark Matter
• The Galaxy Gallery: Messier Objects
• Radiation Dominance in the Early Universe

... 145Slee,Roy Savage We present detailed radio and optical parameters for the stronger radio sources in 58 Abell cluster fields observed with the Very Large Array (VLA) using scaled arrays at 1.5 and 4.9 GHz. ... The cluster fields were distributed over 24 h of RA and between declinations +35 deg and -30 deg. ... Optical identifications Cluster Source Radio Centroid Optical Position EF Ang. ...

Еще в разделе: (Показать все результаты (>1922) - www.sao.ru/ )

• A 20 cm VLA survey of Abell clusters of galaxies
• Gravitational Lensing by Clusters of Galaxies
• A VLA Survey of Rich Clusters of Galaxies III

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

Еще в разделе: (Показать все результаты (>59) - sed.sao.ru/ )

• astro-ph authors/title/abstract search for 'galaxy environment' all years
• astro-ph authors/title/abstract search for 'galaxy merging' all years

... Staff . ... Galaxies, AGN, Cosmology . ... A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope . ... In this framework, an international collaboration between INAF-OAA, INAF-Brera, INAF-OATs, the University for Science and Technology of China-Hefei, the University of Ferrara, and the University of Massachusetts-Amherst, is undertaking a new cluster survey using an X-ray facility that was never exploited before for this goal: the X-ray Telescope (XRT) onboard the Swift satellite...

Еще в разделе: (Показать все результаты (>9744) - www.arcetri.astro.it/ )

• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• Deep Space Objects
• HAEBE Clusters Analysis (Abstract)

Find Similar Abstracts . ... The angular distribution of the microwave background, and its intensity in the direction of galaxy clusters . ... ANGULAR DISTRIBUTION, BACKGROUND RADIATION, GALACTIC CLUSTERS, MICROWAVE SCATTERING, RELIC RADIATION, INTERGALACTIC MEDIA, POLARIZATION CHARACTERISTICS, QUADRUPOLES . ... Use: Authors Title Abstract Text Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

Еще в разделе: (Показать все результаты (>863) - xray.sai.msu.ru/ )

• Old neutron star distribution in the Galaxy
• Contents
• A Gravitational Wave Map of Nearby Galaxies

... 2014 May 5 . Galaxy Cluster Magnifies Distant Supernova . Image Credit: NASA , ESA , C. McCully ( Rutgers U. ) et al. Explanation: How do you calibrate a huge gravitational lens? ... A new calibration technique has been tested recently that consists of waiting for supernovas of a very specific type to occur behind a galaxy cluster, and then figuring out how much the cluster must have magnified these supernovas through gravitational lensing. ... About APOD | ...

Еще в разделе: (Показать все результаты (>5340) - www.sai.msu.su/ )

• APOD Index - Galaxies: Clusters of Galaxies
• Types of Nebulae
• APOD: 2011 June 29 - Abell 2744: Pandora's Cluster of Galaxies

... Australia Telescope Compact Array . ... Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or Extremely Compact Dwarf Galaxies? ... We suggest that these objects are either super-massive star clusters (intra-cluster globular clusters or tidally stripped nuclei of dwarf galaxies) or a new type of low-luminosity compact elliptical dwarf (``M32-type'') galaxy. ... Keywords: galaxies: star clusters -- galaxies: dwarf -- galaxies: formation . ... Properties of the compact objects ...

Еще в разделе: (Показать все результаты (>15404) - www.atnf.csiro.au/ )

• FCC 35
• The galaxy IC 2554
• On the Gas Surrounding High Redshift Galaxy Clusters1

... The obtained results lead to the following conclusions: a) the heavy element enrichment had taken place in the Galaxy in a few bursts of its activity rether than in a continuons manner; b) these bursts occured during the callapse of the early Galaxy; c) the star formation had been inhibited in the time of the bursts; d) the metal enrichment did not proceed in the periods of star formation, between these bursts of activity. ...

Еще в разделе: (Показать все результаты (>136) - ip.rsu.ru/ )

• Subsystems of the Galactic halo, figures

... Visible Distribution of Galaxies. ... Features of Elliptical, Lens-Shaped, Spiral and Irregular Galaxies. Galaxies with Bar. ... Distribution of Surface Brightness of Surface and Spiral Galaxies. ... Color Characteristics of Galaxies. ... Methods of Galaxies' Mass Determination. ... Hidden Mass of Spiral Galaxies. ... Features of Dark Matter Distribution in E and SO Galaxies. ... The Whole Number of Galaxies and Their Density by the Results of Observation on the 'Hubble' Space Telescope. ...

Еще в разделе: (Показать все результаты (>113) - space.univ.kiev.ua/ )

• Stellar Astronomy

... Future seminars . P a s t seminars . ... Stochastic Particle Acceleration and the Problem of Background Plasma Overheating " . D.O. Chernyshov and V.A. Dogiel (P.N.Lebedev Institute of Physics) . ... It was concluded also from these investigations that it is problematic to produce emitting electrons from a background plasma by stochastic (Fermi) acceleration because the energy supplied by external sources in the form of Fermi acceleration is quickly absorbed by background plasma. ...

Еще в разделе: (Показать все результаты (>1406) - www.cosmos.ru/ )

... Curriculum Vitae Observations and theory of star cluster formation 22) A.K.Dambis and Yu.N.Efremov Journal for History of Astronomy, 31, 115-134, 2000 Dating Ptolemy's star catalogue through proper motions: the Hypparchan epoch 23) B.G.Elmegreen, Yu.N.Efremov, S.Larsen Astrophys. J., 535, 748 - , 2000 A young globular cluster in the galaxy NGC 6946 24) Yu.N.Efremov. ... 28) Yu.N.Efremov. ... The location of star complexes in the Galaxy was studied in papers with E.Alfaro, L.Berdnikov and T.Sitnik. ...

Еще в разделе: (Показать все результаты (>638) - lnfm1.sai.msu.ru/ )

• Maidanak Lab page
• Division of the Galaxy and Variable Stars
• Scientific activity

... This represents the first HI selected sample covering the core and the outskirts of a local cluster of galaxies. ... Optically selected samples miss a considerable number of low luminosity, low surface brightness galaxies underestimating by almost a factor 2 the number of HI rich galaxies present in the cluster volume. ... Right: The g band luminosity function for galaxies in the A1367 volume as obtained from the optically (circles) and HI (histogram) selected sample. ...

Еще в разделе: (Показать все результаты (>5053) - www.naic.edu/ )

• http://www.naic.edu/vscience/schedule/tpfiles/Garcia-MarintagA2642tp.pdf
• http://www.naic.edu/vscience/schedule/tpfiles/ConselicetagA1489tp.ps
• http://www.naic.edu/vscience/schedule/tpfiles/Garcia-MarintagA2642tp.ps

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

Еще в разделе: (Показать все результаты (>52) - www.inasan.rssi.ru/ )

• Home page of Dmitri Wiebe
• On current distance scales for open clusters
• Publications of Dmitri Wiebe

Clusters of Galaxies and Large-Scale Structure ** . ... Kopylov, A. I.; Kopylova, F. G. Structure of galaxy groups and clusters measurment of their masses . ... Kopylova, F. G.; Kopylov, A. I. Pecular motions of galaxy clusters and groups in the Hercules and Leo supercluster regions . ... Kopylova, F. G.; Kopylov, A. I. Analysis of the properties of clusters of galaxies in the region of the Ursa Major supercluste . ... Kopylova, F. G.; Kopylov, A. I. The Ursa Major Supercluster of Galaxies: II. ...

Еще в разделе: (Показать все результаты (>1461) - mavr.sao.ru/ )

• articles_flera_en
• Galaxy sector, archive 2012
• Measurement of the dark halo shape in polar ring galaxies

. An outline of how the dark matter distribution (right) was reconstructed from optical images (left) taken by the Subaru Telescope. A precise measurement of the shapes of background galaxies in observed images enabled the team to investigate the distortion pattern (center) and then reconstruct the distribution of dark matter in the galaxy clusters. // NAOJ/ASIAA/School of Physics and Astronomy, University of Birmingham/Kavli IPMU/Astronomical Institute, Tohoku University

Еще в разделе: (Показать все результаты (>7133) - www.astronomy.com/ )

• galaxy clusters | Astronomy.com
• What's the difference between globular clusters and dwarf spheroidal galaxies?
• Our Galaxy's oldest open clusters | Astronomy.com