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1. 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. ...
[ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/textbook/sc.html -- 3.5 Кб -- 23.01.1998
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2. A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
... 87.1083Owen+ VIII/29 1400-MHz Survey of 1478 Abell Clusters of Galaxies (Owen+ 1982) ================================================================================ A 1400-MHz Survey of 1478 Abell Clusters of Galaxies Owen F.N., White R.A., Hilldrup K.C., Hanisch R.J. =1982AJ.. ... 0,] Major axis error 70- 71 A2 --- n_MajAxi *[ A, B, C,NR, ] Major axis note 73- 74 I2 arcmin MinAxi *? ... Note on dist-C: Ratio of the distance of the source from the cluster center to the corrected Abell cluster...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/cats/doc/CL_Owen82.html -- 9.3 Кб -- 18.03.2015
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3. APOD Index - Stars: Open Clusters
Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about open clusters: . APOD: 2006 January 9 - M45: The Pleiades Star Cluster . ... The Pleiades contains over 3000 stars, is about 400 light years away, and only 13 light years across. ... Two types of star clusters are visible in our Milky Way Galaxy : open clusters and globular clusters . ... Aged 80 million years, M47 is a smaller but looser cluster of about 50 stars spanning 10 light-years. ... Index | ...
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/apod/open_clusters.html -- 7.4 Кб -- 21.12.2007
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4. http://www.stsci.edu/~jkalirai/PressStarClustersUCSC.pdf
... Kalirai and Harvey Richer of the University of British Columbia led the study, which began as an investigation of a globular star cluster in the Milky Way galaxy known as NGC 6397. ... Within the population of stars and galaxies behind NGC 6397, the Hubble image revealed a large elliptical galaxy that contains several hundred globular clusters. ... In fact, a single giant star in NGC 6397 appears 10 million times brighter than one of the distant globular clusters. ...
[ Текст ]  Ссылки http://www.stsci.edu/~jkalirai/PressStarClustersUCSC.pdf -- 131.4 Кб -- 19.09.2008
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5. Globular Cluster M5
... Globular Cluster M5 . ... Credit: Anglo-Australian Telescope Board Explanation: The globular cluster M5, pictured above, contains roughly 100,000 stars. ... Stars orbit the center of the cluster, and the cluster orbits the center of our Galaxy. So far, about 160 globular clusters are known to exist in a roughly spherical halo around the Galactic center . ... Publications with keywords: M5 - globular cluster . Publications with words: M5 - globular cluster . ... Globular Star Cluster M3 . ...
[ Сохраненная копия ]  Ссылки http://www.astronet.ru/db/xware/msg/apod/1995-10-19 -- 13.9 Кб -- 22.08.2002
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6. ASP: Big Clusters, Tiny Galaxies
home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/pubs/mercury/32_03/clusters.html -- 17.5 Кб -- 20.04.2012
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7. On current distance scales for open clusters
... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...
[ Сохраненная копия ]  Ссылки http://www.inasan.rssi.ru/~dwiebe/abstracts/dist.html -- 4.2 Кб -- 27.09.2012
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8. http://ocl.sai.msu.ru/catalog/dat/readme/
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. ...
[ Сохраненная копия ]  Ссылки http://ocl.sai.msu.ru/catalog/dat/readme/ -- 5.7 Кб -- 01.10.2012
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9. PPEUC Programme - Cosmic Microwave Background Workshop
... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...
[ Сохраненная копия ]  Ссылки http://www.mrao.cam.ac.uk/ppeuc/proceedings/cmb_prog.html -- 9.9 Кб -- 24.02.1998
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10. Vladimir Marsakov Abstracts
... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...
[ Сохраненная копия ]  Ссылки http://ip.rsu.ru/~marsakov/abs/abst29.htm -- 9.2 Кб -- 02.02.2007
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11. http://www.sao.ru/Doc-en/Science/Public/Bulletin/author_rules/keywords.pdf
... 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 (...
[ Текст ]  Ссылки http://www.sao.ru/Doc-en/Science/Public/Bulletin/author_rules/keywords.pdf -- 440.2 Кб -- 25.03.2016
[ Текст ]  Ссылки http://mavr.sao.ru/Doc-en/Science/Public/Bulletin/author_rules/keywords.pdf -- 440.2 Кб -- 25.03.2016
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12. What are typical star-to-star distances in globular clusters compared to
... Gravitational wave search provides insights into galaxy evolution and mergers . ... galax