... Posts tagged ?clusters? Apr 27th, 2008| 11:29 am | ... The last paper in the list discusses MCMC for time series analysis, applied to sunspot data. ... ArXiv] 4th week, Apr. ... ArXiv] 3rd week, Apr. ... Entries RSS . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

... The large body of near infrared observations presented in Testi et al. (1997; 1998) are analysed with the aim of characterizing the young stellar clusters surrounding Herbig Ae/Be stars. The results confirm the tendency of early Be stars to be surrounded by dense clusters of lower mass "companions", while Ae stars are never found to be associated with conspicuous groups. ... Only the most massive stars (10-20Msun) are found to be associated with dense (10^3 pc^-3) stellar clusters. ...

A Canadian and American team of Astronomers have used the 305-m wide Arecibo radio dish, the world's largest and most sensitive radio telescope, to uncover a dozen new super-fast-spinning pulsars. The team directed their search for these rare and exotic stars by pointing the Arecibo radio telescope towards massive star clusters, called Globular Clusters, orbiting our Milky Way galaxy. ... One of the most exotic residents in the Globular cluster system are the millisecond pulsars. ...

... GSAOI Home . ... Science . ... Deep J , H , and K imaging is required of Galactic and Magellanic Cloud analogs of the super star clusters identified in starburst galaxies. ... Images of the 30 Doradus star cluster in the Large Magellanic Cloud in the visible ( left panels ) and near-infrared ( right panels ) take from the ground ( top panels ) and with the Hubble Space Telescope ( bottom panels ). The fields of the GSAOI detectors are shown as four green squares in each frame. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Parkes radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... RV Tau Variables in Globular Clusters - clues on their nature? ... This is a report of the detailed elemental abundances of RV Tau variables that reside in globular clusters, and how they compare with RV Tau variables in the field. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... stars and star clusters . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email...

... Финогенов Результаты использования ефекта гравитационного искажения формы галактик для измерений массы скоплений. oral . ... Пиотрович Магнитные поля компактных и сверхновых звезд: новые методы и результаты наблюдений. oral . ... Банникова Физическая интерпретация и геометрические следствия рентгеновского излучения в узлах джета 3С273 Михайлова М.С.,Банникова Е.Ю.,Конторович В.М. poster . ... Фиделис Временные и спектральные свойства рентгеновского излучения от блазара 1ES 1426+428 oral . ...

Сайт представляет . Астрономическая энциклопедия . ... Астрономические наблюдения . ... Астрономические ссылки . Астрономические статьи . Астрономическая анимация . Астрономические программы . Астрономический словарь . ... Астрономический юмор . ... Карта сайта | ... Поиск по сайту: . Небо , планеты, звезды, созвездия , галактики, туманности , Вселенная! ... Звездное небо месяца . ... Сертификат сайта ? ... Сopyright 2002-2016 ї Сайт 'Галактика'? ... Фото любителей . ...

... Authors: Radoslaw Wojtak, Steen H. Hansen, Jens Hjorth . ... Authors: M. Deleuil et al. arxiv:1109.0702 Результаты по данным 730 кг*день поисков темной материи на эксперименте CRESST-II (Results from 730 kg days of the CRESST-II Dark Matter Search) . Authors: G. Angloher et al. arxiv:1109.0483 Тесная пара черных дыр в ядре спиральной галактики NGC 3393 (A Close Nuclear Black Hole Pair in the Spiral Galaxy NGC 3393) . ... обзор arxiv:1109.6012 Космология на 21-см (21-cm cosmology) . ...

... Сегодня: 10 апреля 2016 г. Это снимок галактического скопления Abell 1689, сделанный космическим телескопом Hubble. ... Из снимков, сделанных телескопом Hubble, была составлена карта распределения света в галактических скоплениях, а с помощью спектрографа наземного телескопа Gemini были определены массы, возраст и химический состав галактик, входящих в скопления. Галактические скопления содержат самые массивные галактики во Вселенной. ... Большие пятна возвращаются на Солнце . ...

... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...

... About ATMoB . ... The Observing Committee is starting an Observing Awards Program to promote observing among the membership of the Amateur Telescope Makers of Boston. ... Participant must be a current member of the Amateur Telescope Makers of Boston . ... To qualify for your Observing Award Certificate, turn in your worksheet and drawings to an ATMoB Observing Committee member or observing@atmob.org . ... This Excel sheet has useful macros. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Bad Astronomy . ... Bitesize Astronomy . ... The next step up are true clusters, called open clusters . Open clusters (sometimes misleadingly called "galactic clusters") are groups of stars ranging in size from a few dozen stars up to tens of thousands. ... The youngest is about 1 or 2 million years old, while the oldest is about 6 or 7 billion years, making it just older than our own solar system. ... So by looking at the stars in the cluster we can tell pretty well how old they are. ...

... О Далекой Галактике . ... Теперь в Далекой Галактике вы всегда можете увидеть свежие фотографии Солнца. ... Форум . Форум "Далекой Галактики" - прекрасное место для общения всех астрономов. ... Новости из космоса . ... Подписаться на новости Далекой Галактики Вы можете здесь: . ... Новости из Далекой Галактики - популярно об Астрономии . ... Если вы хотите выразить свое мнение о сайте "Далекая Галактика", или просто почитать мнения других посетителей - пожалуйста, заходите в Гостевую книгу . ...

Valentina Klochkova . Klochkova V.G. 21 Jan 08:14:27 GMT+0300 2016

Наблюдения показывают, что хотя количество маломассивных рентгеновских двойных обычно больше у больших (более массивных) галактик, однако, эта корреляция является не очень хорошей. ... Зато, если мы подсчитаем количество шаровых скоплений в этих галактиках, то увидим, что их больше там, где больше маломассивных двойных. ... В нашей Галактике 20 процентов маломассивных рентгеновских двойных находятся в шаровых скоплениях, при том что на скопления приходится лишь 0.1 процента звезд. ...

... For this paper: postscript PPEUC CMB index 1 Introduction.. ... We present a new model for the formation of spherically symmetric clusters in an expanding Universe. Both the Universe and the collapsing cluster are governed by the same pressure less fluid equations for which a uniform initial density profile is assumed. ... The computation of photon paths allows us to evaluate the gravitational effects imprinted on a Cosmic Microwave Background (CMB) photon passing through such an evolving mass. ...

... 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). ...

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

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 . ...