... Posts tagged ?spatial statistics? ... As a part of exploring spatial distribution of particles/objects, not to approximate via Poisson process or Gaussian process (parametric), nor to impose hypotheses such as homogenous, isotropic, or uniform, various nonparametric methods somewhat dragged my attention for data exploration and preliminary analysis. ... I decide to discuss Kalman Filter a while ago for the slog after finding out that this popular methodology is rather underrepresented in astronomy. ...

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• The AstroStat Slog clusters
• The AstroStat Slog globular cluster
• The AstroStat Slog Blog Archive chi-square distribution [Eqn]

The velocity and mass distribution of clusters of galaxies from the CNOC1 cluster redshift survey . ... The resulting sample is ideally suited for an analysis of the internal velocity and mass distribution of clusters. Previous analyses of this dataset used the Jeans equation to model the projected velocity dispersion profile. However, the results of such an analysis always yield a strong degeneracy between the mass density profile and the velocity dispersion anisotropy profile. ...

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• Cluster Lensing: Peering into the Past, . Planning for the Future
• HST this week: 113
• STScI Preprint #1287

Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . Stars . ... This dramatic image depicts Omega Centauri, one of 200 or so globular clusters orbiting our Milky Way galaxy. ... Swarms of tightly packed stars, numbering in the thousands to low millions, globular clusters are cosmic fossils, relics of the early times of our galaxy. Omega Centauri may actually be the core of a smaller galaxy ripped apart and assimilated by our own Milky Way in the distant past. ...

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• A Spectacular View of the Lagoon Nebula | Astronotes
• M55 globular cluster seen by ESO | Astronotes
• Hubble Space Telescope sees into Omega Centauri's future | Astronotes

... Here T is the index set, is the spatial process, is a realization of the process. ... A usual spatial point process is defined as (i.e., the index set is the points of ) or [the number of points within A ]; (i.e., the index set is the units of ), where both and T are random. ... The most important application of lattice models is statistical modeling of spatial images, which is widespread in astronomical image processing (restoration, segmentation, classification, reconstruction, etc.) ...

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• Automated Globular Cluster Photometry with DASHA
• Spatial Structure of NGC 6822: An Example for Statistical Modeling of
• Simulations of Pinhole Imaging for AXAF: Distributed Processing Using the MPI

Next: J.E. Chambers, Research Astronomer Up: Research Previous: Research Contents . ... Solar Variability and Climate . Other Activities . ... Applied to data of flares on Gliese866 he was able to estimate the area of hydrogen emitting flare regions as 1-13% of the stellar surface. ... As partners in the project, Armagh Observatory has been asked to contribute to the selection process in exchange for priority access to the data which will eventually flow from the satellite. ...

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• William Herschel
• Armagh Observatory: Chris Winter [ Bookmarks ]

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Next generation Fornax Cluster surveys . ... Data Handling and Products . ... Science Data Products Forum . ... An international team, with Dr. Hilker as Co-PI, has started to gather wide-field optical and infrared imaging data as well as spectroscopic data on the whole extent of the Fornax cluster, mainly based on observations with ESO telescopes (VLT, VST, VISTA). ...

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• Velocity Distribution of the XLSS-03 Cluster | ESO
• ESO - Thesis Topic: Studying the first galaxy clusters with ALMA
• ESO - Newsletter October 2015

The IMF and Star Formation History of the Stellar Clusters in the Vela D Cloud . ... 2005, A , in press . ... M.T. Beltran, J. Brand, R. Cesaroni, F. Fontani, S. Pezzuto, L. Testi, S. Molinari . ... 2005, Proceedings of the IAUS227 "Massive Star Birth: A Crossroads of Astrophysics", in press . ... Francesco Palla . ... Podio, L., Bacciotti, F., Nisini, B., Giannini, T., Massi, F., Eisloeffel, J., Ray, T.P. 2005, Ap Lecture Series, "Cores to Clusters", in press . ... Star Formation Group . ...

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• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope
• HAEBE Clusters Analysis (Abstract)
• The puzzling core of the Phoenix cluster: deep X-ray observations

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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• Evidence for Dark Matter
• Astronomy HyperText Book: Stellar Evolution
• Radiation Dominance in the Early Universe

... Chubukova I. - Data Mining (2007) PDF Data Mining . Hand D. Mannila H. Smyth P. - Principles of data mining (2001) DJVU Data Mining . Mitra S. Acharya T. - Data mining (2003) (In Russian) DJVU Data Mining . Abbass H. Sarker R. Newton C. - Data Mining Heuristic Approach (2002) PDF Data Mining . Rao C. Wegman E. Solka J. - Handbook of Statistics Data Mining and Data Visualization (2004) PDF Data Mining . ... Whittet D. - Dust in galaxies (2003) PDF Межзвездная среда . ...

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. 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 .

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• Population of Galactic globular clusters, tabl
• Vladimir Marsakov Publication List
• Vladimir Marsakov Abstracts

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• articles_alex_01
• articles_flera_en
• articles_lebedev_en

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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• When galaxy clusters collide | Astronomy.com
• How nature shapes the birth of stars | Astronomy.com
• Globular clusters rotate at heart | Astronomy.com

... Research . ... I aim to understand the variety of processes that have driven galaxy formation and mass assembly across cosmological history via the resolved (star-by-star) study of nearby systems - in particular the Milky Way and Andromeda (especially their stellar halos and globular cluster populations), the Magellanic Clouds, and the myriad of smaller dwarfs that inhabit the "Local Group".б? . ... Globular clusters are fascinating objects in their own right. ...

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• Blue Straggler Stars
• Proposed Facility

... While imaging the cluster of galaxies Abell 370, astronomers had noted an unusual arc to the right of many cluster galaxies. ... In the mid-1980s, however, better images allowed astronomers to identify the arc as a prototype of a new kind of astrophysical phenomenon -- the gravitational lens effect of entire cluster of galaxies on background galaxies. ... In mid-July, astronomers used the just-upgraded Hubble Space Telescope to image Abell 370 and its gravitational lens images in unprecedented...

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• Астронет > Archive of Astronomical and Astrophysical Transactions
• XWare > APOD

... 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. ...

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• Stellar Astronomy

... 633Slee+ Fifty-eight fields near rich clusters of galaxies were surveyed with the Very Large Array using scaled arrays in the B/C and/or C/D configurations at 1.5 GHz and 4.9 GHz. The fields were centered on steep spectrum sources in or near clusters that were earlier surveyed with lower resolution telescopes. ... The columns are : . Column 1 Cluster Field (Z1518 = Zw1518.8+0747) . Column 2 distance of source from cluster centre in Abell radii . ... Column 5 1.5 GHz flux (mJy) . ...

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• A 20 cm VLA survey of Abell clusters of galaxies
• Corrections to the probability distribution
• Cluster Analysis

... BIG BANG COSMOLOGY, GALACTIC CLUSTERS, SPACE DENSITY, UNIVERSE, FRAGMENTATION, HYDROGEN CLOUDS, INTERSTELLAR GAS, SPATIAL DISTRIBUTION, VOIDS . ... The fragmentation theory of the formation of the large scale structure of the universe is explained and contrasted with the continuous clustering theory. ... 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 ...

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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 . ...

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

... 2007 August 9 . Star Cluster Messier 67 . ... Explanation: Gathered at the center of this sharp skyview are the stars of Messier 67 , one of the oldest known open star clusters . In fact, though open star clusters are usually much younger, the stars of M67 are likely around 4 billion years old, about the same age and with about the same elemental abundances as the Sun. ... Still, M67 contains over 500 stars or so and lies some 2,800 light-years away in the constellation Cancer . ...

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• APOD: 2011 June 29 - Abell 2744: Pandora's Cluster of Galaxies
• APOD: 2010 June 20 - Abell 2218: A Galaxy Cluster Lens
• APOD: November 4, 1997 - Blue Stagglers in Globular Clusters

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,  Астероиды ,  Гамма-всплески ,  Любителям астрономии ,  Кометы   . ... Метки: Космический мусор ,  Астероиды ,  Любителям астрономии   . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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