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 (>325) - zebu.uoregon.edu/ )

. ћ . Наши юбиляры . љљљљљљљ љљљљљљљљљ . ћ Сотрудники отдела . ћ Наша научная работа . ћ Семинар по Звездной астрономии . ћ Конференции . ћ Общий Каталог Переменных Звезд . ћ Каталог рассеянных скоплений . ћ Московская школа звездной астрономии . ћ Юбилеи сотрудников . ћ Избранные публикации . ћ Педагогическая и популяризаторская деятельность . ћ Наши интернет-ресурсы и другие полезные ресурсы . ћ Ссылки на каталоги и базы данных . ћ Фотогалерея . Присылайте Ваши вопросы и комментарии Ольге Дурлевич

Еще в разделе: (Показать все результаты (>8127) - www.sai.msu.su/ )

• APOD: 2004 June 17 - Comet NEAT and the Beehive Cluster
• APOD: 2014 July 15 - A Blue Bridge of Stars between Cluster Galaxies
• APOD: November 1, 1995 - M16: Dust and an Open Cluster

Figure 1. ... Scattering geometry illustration. ... Maps of scattering angle in the cluster core for standard GCW grains and a Model A nebula (left) and UV-altered GCW grains in the same model (right). ... Degrees of consistency between the scattering angles of different models at different wavelengths. ... Schmidt scattering angles over a wider area. ... Schmidt line-of-sight separations over the same area, derived for two different simplified geometric models. ...

Еще в разделе: (Показать все результаты (>3363) - www.naic.edu/ )

• AGES - the Arecibo Galaxy Environment Survey
• The Pleiades
• Jodrell Multi-beam Virgo Survey

... 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 . ...

Еще в разделе: (Показать все результаты (>2519) - hea-www.harvard.edu/ )

• The AstroStat Slog LF
• Comments on: Quote of the Week, Aug 23, 2007 By: aconnors By: hlee By: hlee
• The AstroStat Slog Blog Archive Quote of the Week, Aug 23, 2007

... 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 (>51554) - www.eso.org/ )

• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations
• ESO - Thesis Topic: The onset of cluster formation near young high-mass stars
• Anja Feldmeier-Krause

... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...

Еще в разделе: (Показать все результаты (>1627) - www.adass.org/ )

• A Commodity Computing Cluster
• AIRY: Astronomical Image Restoration in interferometrY
• Structure Detection in Low Intensity X-Ray Images using the Wavelet Transform

... October 18, 1999 . NGC 3603: An Active Star Cluster . ... Explanation: NGC 3603 is home to a massive star cluster, thick dust pillars, and a star about to explode . The central open cluster contains about 2000 bright stars, each of which is much brighter and more massive than our Sun . ... These stars are less massive than our Sun, demonstrating that great numbers of low-mass stars also form in active starburst regions . ... About APOD > . ...

Еще в разделе: (Показать все результаты (>6856) - www.arcetri.astro.it/ )

• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster
• APOD: 2000 January 4 - Galaxies Cluster Toward the Great Attractor

... NGC1850: Star Cluster in the LMC . ... Credit: R. Gilmozzi ( STScI / ESA ) S. Ewald, ( JPL ), NASA Explanation: NGC1850 is a large cluster of stars located a mere 166,000 light-years from Earth in our neighboring galaxy the Large Magellanic Cloud (LMC). ... Yellowish stars are the main cluster stars, sun-like main sequence hydrogen burners about 50 million years old. ... Publications with keywords: star cluster - LMC - stellar evolution - star - cluster - NGC 1850 . ... The Star Clusters of NGC 1313...

Еще в разделе: (Показать все результаты (>96964) - www.astronet.ru/ )

• Abell 2744: Pandoras Cluster of Galaxies
• Астронет > NGC1850: Star Cluster in the LMC
• Journal "Peremennye Zvezdy"

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

Еще в разделе: (Показать все результаты (>615) - www.mso.anu.edu.au/ )

• Proposed Facility
• Dougal Mackey - Research
• GSAOI Orion Nebula Cluster Science Page

... Astrophysics Group . ... MRAO Telescopes . AMI . ... This is a cosmic microwave background (CMB) telelescope with a difference, in that it is designed to survey the sky looking for galaxy clusters by means of the ?shadows? they cast against the CMB. This shadowing, the so-called SZ effect, is a remarkable phenomenon because it is independent of redshift, allowing AMI to find clusters which are so far away that their own emission would be too faint to detect ? ...

Еще в разделе: (Показать все результаты (>1655) - www.mrao.cam.ac.uk/ )

• Astrophysics Group AMI Science
• Limits on Phase Correction Performance Due to Differences Between Astronomical

ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

Еще в разделе: (Показать все результаты (>359) - www.atmob.org/ )

• http://www.atmob.org/about/observing/awards/files/globular_cluster_instructions_2011-02-01.pdf

. 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 .

Еще в разделе: (Показать все результаты (>103) - ip.rsu.ru/ )

• Subsystems of the Galactic halo, figures
• Vladimir Marsakov Abstracts
• Vladimir Marsakov Publication List

Program number . ... Infrared Snapshots of 3CR Radio Galaxies . Abstract . ... Holland Ford, The Johns Hopkins University . ... An ACS H-alpha Survey of the Carina Nebula . ... A Snapshot Survey of the most massive clusters of galaxies . ... An ACS Imaging Survey of the Galaxies Hosting Strong Mg II Absorption . ... ACS observations of the galaxies in a giant Ly-alpha nebula at z~2.7 . ... An ACS Survey of a Complete Sample of Luminous Infrared Galaxies in the Local Universe . ... Past weeks: . ...

Еще в разделе: (Показать все результаты (>13326) - www.stsci.edu/ )

• The M87 Globular Cluster System Revisited
• Cluster Lensing: Peering into the Past, . Planning for the Future
• Jason Kalirai's Homepage -- Research

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 (>9690) - www.atnf.csiro.au/ )

• http://www.atnf.csiro.au/research/cena/documents/presentations/struve.pdf
• Cluster Membership
• WALLABY - the ASKAP HI All-Sky Survey

... Description . Catalog . ... In the Catalog, we publish equatorial (ЮБ 2000 , ЮД 2000 ) and galactic (l,b) coordinates of cluster centers derived as the position of overdensity in 2MASS catalog (Koposov et al. ... Distances, color-excesses and ages are the mean-square values calculated using all available evaluations from different color-magnitude diagrams. ... There are individual pages for every cluster where all available plots and parameters are published. ... 2002). ...

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

• SAI Open Star Clusters (SAI OCL) Catalog

Participant 5 (P5) ================== Dr. V.P. Tishkovets - Astronomical Observatory, Kharkov University, UA Dr. N.N. Kiselev - Astronomical Observatory, Kharkov University, UA P.V. Litvinov - 26 years old; Astronomical Observatory, Kharkov University, UA S.A. Beletsky - 28 years old; Astronomical Observatory, Kharkov University, UA The head of the team, Dr. Tishkovets, and Mr. Litvinov made many investigations of light scattering by clusters of particles - analogues of interplanetary dust grains. ...

Еще в разделе: (Показать все результаты (>365) - www.astro.spbu.ru/ )

• Introduction
• Model of clusters
• Model realization and some results

... 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 (>1657) - www.sao.ru/ )

• Cluster Analysis
• Age of the Universe
• Tclet for Cluster Database.

... ME AND MY SCHOOL . SOURCES . THE CHART OF THE DIFFERENCES IN THE SPELLING OF SOME WORDS CONNECTED WITH SCHOOL AND EDUCATIONAL SYSTEM IN BRITAIN AMERICA. ... РАЗЛИЧНЫЕ СТРАНЫ ИМЕЮТ РАЗЛИЧНЫЕ СИСТЕМЫ ОБРАЗОВАНИЯ, НАПРИМЕР ВЕЛИКОБРИТАНИЯ ИЛИ СОЕДИНЕННЫЕ ШТАТЫ. ... ОБО МНЕ И МОЕЙ ШКОЛЕ(ME AND MY SCHOOL), . ... А ТАКЖЕ ВАМ ПРЕДЛАГАЕТСЯ ТАБЛИЦА РАЗЛИЧИЙ В НАПИСАНИИ И ПРОИЗНОШЕНИИ СЛОВ СВЯЗАННЫХ С ОБРАЗОВАТЕЛЬНОЙ СИСТЕМОЙ В США(AMERICAN ENGLISH)И ВЕЛИКОБРИТАНИИ(BRITISH ENGLISH)-THE CHART . ...

Еще в разделе: (Показать все результаты (>61) - www.schools.keldysh.ru/ )

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

Еще в разделе: (Показать все результаты (>25) - www.sai.msu.ru/ )

• Index of /groups/cluster/gcvs/digit/mdv
• Index of /groups/cluster/gcvs/digit
• Index of /groups/cluster/gcvs/digit/preprint.files

... Tonight's Sky . ... Sky this Month . ... galaxies . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Astronomy for Kids . ... What's the difference between globular clusters and dwarf spheroidal galaxies? ... Dwarf spheroidal galaxies are much bigger than globular clusters. The Pegasus dwarf spheroidal galaxy, which orbits the famous spiral galaxy M31 in Andromeda, spans 2,000 light-years. ... Get instant access to subscriber content on Astronomy.com! ...

Еще в разделе: (Показать все результаты (>6126) - www.astronomy.com/ )

• How can astronomers tell the difference between a group or cluster of stars and
• Why do some stars appear to flash a variety of different colors when you look
• Does the time it takes different methods to create all the elements coincide