. F igure . 7. Distributions of height above the Galactic plane for (a) thick-disk, (b) old-halo, and (c) young-halo clusters. The curves are exponential least-squares approximations of the corresponding distributions. discussion in the text | privious figure | next figure .

Еще в разделе: (Показать все результаты (>160) - ip.rsu.ru/ )

• Population of Galactic globular clusters, tabl
• Subsystems of the Galactic halo, figures
• Vladimir Marsakov Abstracts

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. ...

Еще в разделе: (Показать все результаты (>320) - zebu.uoregon.edu/ )

• Evidence for Dark Matter
• Radiation Dominance in the Early Universe

... We present V and I photometry for a sample of globular cluster candidates in the Virgo galaxy M87. ... A comparison with the color distribution of globular clusters in the Milky Way shows that M87 contains a large population of red clusters that is virtually absent in our Galaxy. ... Increasingly accurate measurements of the colors and metallicities of globular clusters in distant galaxies are beginning to shed new light on, and provoke new questions about, the origin of globular cluster systems. ...

Еще в разделе: (Показать все результаты (>16605) - www.stsci.edu/ )

• STScI Preprint #1287
• Hubble Space Telescope Observations of Globular Clusters in M87 and an Estimate
• HST this week: 113

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 (>603) - www.mso.anu.edu.au/ )

• http://www.mso.anu.edu.au/seminars/abstracts/20151106-1420.html
• GSAOI Globular Cluster Science Page

... Bisnovatyi-Kogan, Gennady S.; Merafina , Marco; Vaccarelli , Maria Rosaria; Spherically Symmetric Stellar Clusters with Anisotropy and Cutoff Energy in Momentum Distribution. ... We construct numerical models of spherically symmetric Newtonian stellar clusters with anisotropic distribution functions. ... Models of spherically symmetric relativistic stellar clusters with anisotropic distribution functions in relativistic regime are described by using Maxwellian distribution function with energy...

Еще в разделе: (Показать все результаты (>1163) - www.cosmos.ru/ )

• The summary plot of time distribution of the multisatellites magnetic

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 June 29 . Abell 2744: Pandora's Cluster of Galaxies . Image Credit: NASA , ESA , J. Merten ( ITA , AOB ), D. Coe ( STScI ) . ... Far from a smooth distribution, Abell 2744 not only has knots of galaxies, but the X-ray emitting hot gas (colored red) in the cluster appears distributed differently than the dark matter . ... About APOD | ...

Еще в разделе: (Показать все результаты (>8205) - www.sai.msu.su/ )

• APOD: February 25, 1999 - NGC 6712: Galactic Globular Cluster
• APOD: 2006 August 10 - Galactic Center Star Clusters
• APOD Index - Stars: Globular Clusters

... Abell 2744: Pandoras Cluster of Galaxies . ... Credit Copyright: NASA , ESA , J. Merten ( ITA , AOB ), D. Coe ( STScI ) Explanation: Why is this cluster of galaxies so jumbled? Far from a smooth distribution, Abell 2744 not only has knots of galaxies, but the X-ray emitting hot gas (colored red) in the cluster appears distributed differently than the dark matter . ... Publications with keywords: galaxy cluster - dark matter - hot gas . ... The Hydra Cluster of Galaxies . ...

Еще в разделе: (Показать все результаты (>86310) - www.astronet.ru/ )

• The Hydra Cluster of Galaxies
• Journal "Peremennye Zvezdy"
• The Matter of Galaxy Clusters

Formation of intra-group HI gas through multiple galaxy encounters and ram pressure stripping Kenji Bekki (ICRAR at UWA, Australia) (Figures from APOD) Physical processes that drive galaxy evolution in different environments. (a) Ram pressure stripping due to hot intergalactic medium in clusters. ... Ram pressure of warm/hot intra-group gas on extended gaseous (HI) disks of galaxies in small groups and filaments (with Westmeier T. et al. ... 2011) Gas kinematics of disk galaxies under ram pressure. ...

Еще в разделе: (Показать все результаты (>9561) - www.atnf.csiro.au/ )

• http://www.atnf.csiro.au/research/LVmeeting/magsys_pres/LMC07a.pdf
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• The Interacting Galaxy Pair NGC 6872 / IC 4970

J/AstL/vol/page SAI Open Clusters Catalog (Glushkova+, 2009) ================================================================================ Automated search for star clusters in large multiband surveys. ... Color excesses E(B-V), distance moduli and ages were determined for 141 new and 27 known, but poorly studied clusters. We present the Sternberg Astronomical Institute Open Clusters Catalog (SAI OCL Catalog) of coordinates, diameters and main physical parameters of these clusters. ...

Еще в разделе: (Показать все результаты (>222) - ocl.sai.msu.ru/ )

• SAI Open Star Clusters (SAI OCL) Catalog
• SAI OCL Catalog Description
• SAI OCL Catalog Publications

This image from the NASA/ESA Hubble Space Telescope shows NGC 6388, a dynamically middle-aged globular cluster in the Milky Way. ... A new study using Hubble data has discovered that globular clusters of the same age can have dramatically different distributions of blue straggler stars within them, suggesting that clusters can age at substantially different rates. Credit: NASA/ESA/F. Ferraro (University of Bologna) ...

Еще в разделе: (Показать все результаты (>6144) - www.astronomy.com/ )

• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B4CBAD180-2693-408B-AD1D-DDE2856396E7%7D
• Dark matter affects architecture of galaxy clusters | Astronomy.com
• globular clusters | Astronomy.com

... Archives . ... ArXiv] SVM and galaxy morphological classification, Sept. 10, 2007 . ... On the Metallicity-Color Relations and Bimodal Color Distributions in Extragalactic Globular Cluster Systems by M. Cantiello and J. P. Blakeslee . Many observations on globular cluster systems (GCS) show bimodal distributions in color and metallicity space. ... Based on their simulation study, (V-H) and (V-K) are confirmed to be good colors for revealing unbiased bimodal metallicity distributions in GCS. ...

Еще в разделе: (Показать все результаты (>3447) - hea-www.harvard.edu/ )

• The AstroStat Slog Blog Archive my first AAS. IV. clustering
• The AstroStat Slog clusters
• The AstroStat Slog Blog Archive What is so special about chi square in

... 1) Studying distributions of stars of different ages in irregular and spiral galaxies we found for each galaxy a clear correlation between the age of stars and the spatial size of the subsystems of stars of this age. ... We made a stellar photometry of eight NGC 1313 fields and of its dwarf companion AM 0319-662 and studied the visible distribution of stars of different ages and of metallicity in the galaxy. ... This disappeared galaxy was the cause of the gravitational deformation of NGC 1313. ...

Еще в разделе: (Показать все результаты (>229) - mavr.sao.ru/ )

• articles_alex_01
• articles_flera_en
• important_en

FLAMES multiobject spectroscopy of low mass stars in the "twin" young clusters Ori andOri 1,2 1 3 G.G. Sacco , R. Pallavicini , S. Randich , 1 3 E. Franciosini , F. Palla 1 INAF Osservatorio Astronomico di Palermo, Italy 2DSFA UniversitЮ di Palermo, Italy 3 INAF ­Osservatorio Astrofisico di Arcetri, Italy ABSTRACT Using FLAMES on VLT/UT2, we obtained spectra of 147 lowmass candidate members of the two young (~5 Myr) and coeval clusters Ori and Ori. ... Results: In Ori we identified 65 members. ...

Еще в разделе: (Показать все результаты (>7336) - www.arcetri.astro.it/ )

• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster
• Young stellar clusters in the star forming region NGC 6357
• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope

... Compact Binaries . ... Globular Clusters . ... Ultra-Compact binaries in globular clusters . ... It is known that UC X-ray binaries are more abundant in globular clusters compared to that found in Galactic fields (eg van der Sluys, Verbunt \ Pols 2005 and references therein). On the other hand no AM CVn systems have been found in globular clusters, while 20 are known in the Galactic field (for a review of AM CVn systems see Nelemans 2005). ...

Еще в разделе: (Показать все результаты (>2012) - star.arm.ac.uk/ )

• Galactic distribution and absolute magnitudes
• Armagh Observatory
• Irregular Satellite Research

Next: Star Formation Rate and Up: No Title Previous: Calculation of Evolutionary Tracks . To start calculations, we choose the distributions of the initial binary parameters: the mass of the primary ZAMS component, , binary mass ratio, , orbital separation a . ... whereas the mass ratio distribution is not. ... The zero assumption often made is that the mass ratio distribution has a flat shape, that is binaries with a high mass ratio occur as frequently as those with equal masses. ...

Еще в разделе: (Показать все результаты (>595) - xray.sai.msu.ru/ )

• Test of the Initial Mass-Ratio Distribution
• Frequency distribution of galactic binaries
• Gravitational waves from supernova explosions

... Science . ... The goal is to bring together two communitities: the one working on star formation (mostly galactic) and the one working on the formation of young massive clusters (mostly extra-galactic). We will link galactic with extra-galactic work, optical/NIR techniques with sub-mm/mm/radio ones, the formation of stars with the one of massive star clusters - observations and theory. ... Coordinated by Marina Rejkuba (abstract) . ... How did star formation proceed in Globular Clusters? ...

Еще в разделе: (Показать все результаты (>47130) - www.eso.org/ )

• Marina Rejkuba's Web Site
• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations
• IAU Symp317 Scientific Program

... 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 (>35) - www.inasan.rssi.ru/ )

• On current distance scales for open clusters

... 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 (>3222) - www.naic.edu/ )

• Figures for Scattering Paper
• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• Jodrell Multi-beam Virgo Survey

... 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. ...

Еще в разделе: (Показать все результаты (>1934) - www.sao.ru/ )

• A VLA Survey of Rich Clusters of Galaxies II
• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Radio data

... We describe a tool in the PCIPS environment for finishing the job of globular cluster photometry started by DAOPHOT II: starting with the instrumental magnitudes derived by DAOPHOT II, DASHA can automatically produce final color-magnitude diagrams. ... DASHA can automate the whole process of globular cluster photometry, from instrumental magnitude lists produced by DAOPHOT II, to final color-magnitude diagrams. ... DASHA is oriented towards star lists produced by DAOPHOT II as source data. ...

Еще в разделе: (Показать все результаты (>1826) - www.adass.org/ )

• Mapping the Jagiellonian Field of Galaxies
• A Commodity Computing Cluster
• ADASS 2003 Conference Proceedings