Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

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• Observational Constraints
• Radiation Dominance in the Early Universe
• Constrains on Dark Matter

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

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• SAI OCL Catalog Description
• SAI OCL Catalog Structure
• SAI OCL Catalog Publications

... 2000 March 6 . Abell 2142: Clash of the Galaxy Clusters . ... Explanation: Over the course of billions of years, whole clusters of galaxies merge. Above is an X-ray image of Abell 2142 , the result of the collision of two huge clusters of galaxies , and one of the most massive objects known in the universe. This false-color image shows a concentration of gas 50 million degrees hot near the center of the resulting cluster. ... About APOD | ...

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• APOD: 2002 December 29 - NGC 1818: A Young Globular Cluster
• APOD: February 14, 1997 - NGC 1818: A Young Globular Cluster
• APOD: January 17, 1999 - NGC 1818: A Young Globular Cluster

... The evolution of magnetic fields in OB-type stars from the study of open clusters of different ages . ... Wade G. A. The MiMeS Project: Magnetism in Massive Stars . ... Polosukhina N., Shavrina T., Drake N., Kudryavtsev D. Smirnova M. New results of the spectral observations of CPstars in the Li I 6708? spectral region with BTA telescope of SAO RAS . ... Magnetic Stars-2010 . ... List of participants . List of reports . ... Laboratory for the Stellar Magnetism Study of SAO of the RAS . ...

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• SCORPIO: IFP Gallery

... Kopylov, A.I., Kopylova, F.G. "Structure of galaxy groups and clusters and measurement of their masses", . ... Kopylova, F.G., Kopylov, A.I. "Peculiar 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 Leo supercluster", . ... Kopylova, F.G., Kopylov, A.I. "Analysis of the properties of clusters of galaxies in the region of the Ursa Major supercluster", . ...

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• articles_alex_01
• important11-15_en
• topic_en

... Takuya Akahori "Faraday Rotation Measure due to the Intergalactic Magnetic Field" . Shae Brown "Cross-correlation of ATLAS and Spitzer-SWIRE Surveys: Probing intergalactic magnetic fields" . Roger Clay "Using low energy cosmic rays to investigate local galactic magnetic fields" . Roland Crocker "A new lower limit on the magnetic field around the Galactic Centre" . ... JinLin Han "Rotation measures of pulsars and radio sources for Galactic magnetic fields" . ...

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• WALLABY - the ASKAP HI All-Sky Survey
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• Uncovered Structures and the Cluster Abell 3627

... We have made observations of the Perseus cluster with the Westerbork Telescope at 610 MHz. ... Several newly detected sources are identified with cluster galaxies. ... No evidence is found for the existence of the previously reported ~ 65'x25' cluster halo, 3C 84B. Key words: radio galaxies - clusters - tailed radio sources buoyancy The Perseus Cluster of galaxies is one of the most fascinating systems accessible to extragalactic astronomers. ...

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• Old "Structure" publications
• Clusters of Galaxies
• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies

... 2001 March 11 . NGC 1818: A Young Globular Cluster . ... Explanation: Globular clusters once ruled the Milky Way . Back in the old days , back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy . ... There are few, if any, young globular clusters in our Milky Way Galaxy because conditions are not ripe for more to form. ... Pictured above is a "young" globular cluster residing there: NGC 1818 . ... About APOD | ...

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• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope
• APOD: 2000 January 12 - NGC 6791: An Old, Large Open Cluster

... Science Users Information > Science Activities > Science in Garching > Research Area: STELLAR STRUCTURE AND EVOLUTION . ... Reset view all 3 per page 5 per page 10 per page Sort by Title A-Z Title Z-A Date asc Date desc Research Topics Planets and Star Formation Stellar Structure and Evolution Stellar Populations Cosmology and the Early Universe Scientific Positions Faculty Fellows Scientists Students . ... Planets and Star Formation Stellar Populations Stellar Structure and Evolution Faculty . ...

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• ESO - cosmology2002
• ESO - star07
• ESO - Research Area: STELLAR POPULATIONS

Next: Model of clusters Up: paper2 Previous: paper2 . ... It allows estimating different microphysical properties of scatterers (size, complex refractive index, shape, etc.) from measured characteristics of the scattered radiation. ... The complexity of the direct problem depends on its input parameters characterizing the shape, size and structure of the scattering particle. ... Next: Model of clusters Up: paper2 Previous: paper2 root 2003-04-11 ...

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• Model of clusters
• Model realization and some results

. F IGURE . 13. The (a) metallicity and (b) age distributions of the globular clusters of Galactic origin. Different shadings are used to show the thick-disk and old-halo clusters. The curves are Gaussian fits to the corresponding histograms. discussion in the text | privious figure | next figure .

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• Vladimir Marsakov Abstracts
• Subsystems of the Galactic halo, figures
• Globular clusters with anomalously small masses, figures

... Laboratory of Real Structure of Crystals . ... Fields of research . Experimental techniques . ... Photoelasticity method for study of microstress fields around individual dislocations (and their clusters) and their influence on physical properties of crystals. ... Two-level periodic pulse loading technique for study of characteristics of the kink pair formation and motion along dislocation lines in different types of crystals. ISSP RAS © 2006 All rights reserved ...

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• Phys. Rev. B 54, 454 (1996): Neminsky et al. - ac susceptibility of Rb
• Laboratory for Spectroscopy of Molecular Structures

... Commission 37: Star Clusters and Associations . Home Page . Commission 37 of the International Astronomical Union deals with all aspects of Globular Cluster, Open Cluster, and Stellar Associations research. With Commission 33 it forms Division VII of the IAU. Commission Structure . ... IAU Home Page . Open Clusters Database (maintained by J.-C. Mermilliod ) . Catalogue of Milky Way Globular Cluster Parameters (maintained by W. E. Harris ) . ...

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• GSAOI Super Star Clusters Science Page
• GSAOI Open Cluster Science Page

... We have simulated the observations of a very distant cluster of galaxies at high redshift. ... The simulations are made for the HST instruments FOC, WFPC II, and the Advanced Camera, and for an 8-m telescope on the ground equipped with adaptive optics. ... A comparison of the fields of view of post-COSTAR HST imaging instruments with the Advanced Camera (AC) and the ground-based adaptive optics camera (AO) is shown in Fig. 1 superimposed on the noise-free cluster simulation. ...

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• HST this week
• HST this week: 113
• ST ScI Preprint #1362

... Archives . ... my first AAS. ... I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. ... classification vs. clustering or supervised learning vs. unsupervised learning : the former terms from the pairs indicate the fact that the scientist already knows types of objects in his hands. ... Tags: Classification , clustering , cosmology , spatial statistics , supervised learning , test , unsupervised learning . ...

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• Scott Randall's Home Page
• The AstroStat Slog clusters
• The AstroStat Slog Globular Clusters

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

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• Astrophysics Group AMI
• Abstract
• Astrophysics Group AMI Science

... Credit: Anglo-Australian Telescope Board Explanation: Elliptical galaxy M87 is a type of galaxy that looks much different than our own Milky Way Galaxy . But even for an elliptical galaxy M87 is peculiar. ... In general, elliptical galaxies contain similar numbers of stars as spiral galaxies , but are ellipsoidal in shape (spirals are mostly flat), have no spiral structure, and little gas and dust. ... Publications with keywords: Elliptical Galaxy . Publications with words: Elliptical Galaxy . ...

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• Journal "Peremennye Zvezdy"
• NGC 1818: A Young Globular Cluster

... AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) · Detected 5 galaxies in the group KDG 010 dw0137+1540 UGC 1171 AGES Precursor ...

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• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• Multiscale Structure of Interstellar Matter
• Heiles Symposium Presentations

... Bad Astronomy . ... Bitesize Astronomy . ... The last step encompassed them all with galaxies , and how we discovered that the Milky Way was not the entire Universe. ... And just like those star clusters, there are different kinds of galaxy clusters. ... There are vast clusters of clusters, called superclusters, which contains hundreds of thousands or even millions of galaxies. ... Our own Galaxy has 400 billion stars in it, yet there are clusters out there with millions of galaxies like our own. ...

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... How to calibrate the energy scale for higher energies of future gratings? Difficult to find astronomical targets with well defined lines. ... Source Energy Flux keV HZ 43 0.2 Bright Sirius B 0.2 HZ43 /10 RXJ1856 1 Faint Simplicity Var WD WD No No No No Yes Yes Extend Lines Point Point Point 1' Point Point Point No Point Point Yes No Yes Yes Yes Yes Point Point , jet Point Cont Cont Cont Cont Lines Cont Lines Lines Lines ...

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• http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/201203/nevalianen-cal-2012.pdf