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http://ip.rsu.ru/~marsakov/conf/paper3/c3fg1.htm.
http://ip.rsu.ru/~marsakov/conf/paper3/c3fg1.htm.
1. Population of Galactic globular clusters, figures
. 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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Ссылки http://ip.rsu.ru/~marsakov/paper5/p5fg13_1.htm -- 2.0 Кб -- 02.02.2007
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2. The M87 Globular Cluster System Revisited
... 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. ...
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Ссылки http://www.stsci.edu/stsci/meetings/shst2/elsonr.html -- 15.8 Кб -- 12.04.2006
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3. http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html
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). ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html -- 5.7 Кб -- 10.04.2016
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4. Astronomy HyperText Book: Stellar Clusters
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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Ссылки http://zebu.uoregon.edu/textbook/sc.html -- 3.5 Кб -- 23.01.1998
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5. http://www.naic.edu/alfa/ealfa/papers/cortese_iau244.pdf
... 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. ...
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Ссылки http://www.naic.edu/alfa/ealfa/papers/cortese_iau244.pdf -- 122.5 Кб -- 20.08.2007
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6. http://www.iki.rssi.ru/comp/2010/BK.htm
... 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...
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Ссылки http://www.iki.rssi.ru/comp/2010/BK.htm -- 28.7 Кб -- 15.11.2010
[ Сохраненная копия ] Ссылки http://www.cosmos.ru/comp/2010/BK.htm -- 28.7 Кб -- 15.11.2010
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[ Сохраненная копия ] Ссылки http://www.cosmos.ru/comp/2010/BK.htm -- 28.7 Кб -- 15.11.2010
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7. important11-15_en
... 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. ...
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Ссылки http://www.sao.ru/hq/dolly/important11-15_en.html -- 18.0 Кб -- 10.04.2016
[ Сохраненная копия ] Ссылки http://mavr.sao.ru/hq/dolly/important11-15_en.html -- 18.0 Кб -- 09.04.2016
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[ Сохраненная копия ] Ссылки http://mavr.sao.ru/hq/dolly/important11-15_en.html -- 18.0 Кб -- 09.04.2016
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8. APOD: 2011 June 29 - Abell 2744: Pandora's Cluster of Galaxies
... 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 | ...
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Ссылки http://www.sai.msu.su/apod/ap110629.html -- 5.6 Кб -- 03.02.2013
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9. Abell 2744: Pandoras Cluster of Galaxies
... 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 . ...
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Ссылки http://www.astronet.ru/db/xware/msg/1252626 -- 15.8 Кб -- 29.06.2011
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10. The AstroStat Slog Blog Archive my first AAS. IV. clustering
... 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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Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/2008/my-first-aas-iv-clustering/index.html -- 24.2 Кб -- 01.03.2014
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11. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B0FAD7669-7238-499F-908D-97B43B4EC2B6%7D
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) ...
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Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B0FAD7669-7238-499F-908D-97B43B4EC2B6%7D -- 4.3 Кб -- 10.04.2016
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12. A VLA Survey of Rich Clusters of Galaxies II
... 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. ...
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Ссылки http://www.sao.ru/cats/doc/CL_Slee2.html -- 6.7 Кб -- 18.03.2015
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13. http://www.atnf.csiro.au/research/WALLABY/Wallaby2010/KBekki-Wallaby2010.pdf
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. ...
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Ссылки http://www.atnf.csiro.au/research/WALLABY/Wallaby2010/KBekki-Wallaby2010.pdf -- 2488.6 Кб -- 10.12.2010
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14. A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope
... 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...
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Ссылки http://www.arcetri.astro.it/en/previous/204-scientific-news/733-swxcs -- 29.8 Кб -- 10.04.2016
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15. http://star.arm.ac.uk/~gar/research/globular.html
... 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). ...
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Ссылки http://star.arm.ac.uk/~gar/research/globular.html -- 4.9 Кб -- 16.07.2007
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16. Globular Clusters: Self-Enrichment
... 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. ...
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Ссылки http://www.inasan.rssi.ru/~dwiebe/abstracts/gcl.html -- 3.5 Кб -- 27.09.2012
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17. SAI Open Star Clusters (SAI OCL) Catalog
... 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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18. Gravitational waves from supernova explosions
... We can investigate projection of this distribution onto the celestial sphere in two ways: in terms of lines of constant SN frequencies per one square degree for all galaxies from the sample (Figure 36 ), and in terms of constant GW amplitudes at a given SN frequency per square degree (Figure 44 ). ... Figure 45: The sky distribution of the total supernova frequency from nearby galaxies in terms of lines of equal frequencies per square degree. ...
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Ссылки http://xray.sai.msu.ru/~mystery/articles/review/node88.html -- 10.9 Кб -- 29.03.1997
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19. Marina Rejkuba's Web Site
... Resolved Stellar Populations Globular Clusters . Galaxies are made of stars, gas and the illusive dark matter. ... Star clusters are the simplest form of the stellar population. ... Old globular clusters are easily observed at great distances and can be used as probes of the early stages of star formation history in galaxies where individual stars cannot be resolved. My research interests are centered on the studies of resolved stellar populations and (old) star clusters in nearby galaxies. ...
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Ссылки http://www.eso.org/~mrejkuba/research/index.html -- 5.7 Кб -- 19.08.2014
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20. http://www.gpad.ac.ru/collaborations/inasan.pdf
The new view on the population of Galactic open clusters A.E.Piskunov1, N.V.Kharchenko2, S.RЖser3, E.Schilbach3, R.-D.Scholz4 1 2 3 4 Institute of Astronomy, Moscow, Russia Main Astronomical ... Observatory, Kiev, Ukraine Astronomisches Rechen-Institut, Heidelberg, Germany Astrophysikalisches Institut Potsdam, Germany What are open clusters and what do they teach us Groups of Population I ... Cluster complexes: OCC-1 = Gould's Belt cluster complex? ...
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Ссылки http://www.gpad.ac.ru/collaborations/inasan.pdf -- 2655.7 Кб -- 05.07.2006
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