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1. 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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2. Dust Production and Mass Loss in the Galactic Globular Cluster NGC 362
We investigate dust production and stellar mass loss in the Galactic globular cluster NGC 362. ... We detect several cluster members near the tip of the red giant branch (RGB) that exhibit infrared excesses indicative of circumstellar dust and find that dust is not present in measurable quantities in stars below the tip of the RGB. ... The two most extreme stars, variables V2 and V16, contribute up to 45% of the total cluster dust-traced mass loss. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/~kgordon/papers/2009ApJ...705..746B.html -- 4.8 Кб -- 21.01.2016
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3. Phil Plait's Bad Astronomy: Bitesize Astronomy
... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...
[ Сохраненная копия ]  Ссылки http://www.badastronomy.com/bitesize/jetplane.html -- 21.9 Кб -- 09.04.2016
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4. HyperLEDA documentation: parameter: vdis
The central velocity dispersion represents the internal motions of the stars along a column crossing the center of a galaxy or star cluster. ... The catalogue of collected velocity dispersions may be accessed in HyperLeda. vdis is the velocity dispersion given in km/s. The velocity dispersion gives to some approximation the scale for the specific kinetic energy contained in in un-ordered motions and combined with the velocity of rotation it may give an estimate of the specific kinetic energy. ...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/fetch/HL/leda/param/vdis.html -- 4.4 Кб -- 23.12.2013
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5. 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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6. 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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7. 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. ...
[ Сохраненная копия ]  Ссылки http://ocl.sai.msu.ru/ -- 5.0 Кб -- 09.04.2016
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8. Parameters
... Meta Index / Home Page This section documents the parameters recognized by this task (if any). ... To access the pre-2.9 mode of operation, set style to `pipeline'. In this mode, the inputs must be supplied via the parameters gtitable and eventset , and the output appears as one or more extensions named STDGTI n of the file pointed to by parameter outset . ... valid table spec. This parameter is read if style =`pipeline' (the default).) ... This parameter is read if style =`generic'.) ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/sas/7.0.0/doc/gtialign/node6.html -- 7.6 Кб -- 28.06.2006
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9. Globular Cluster M19
... 19.07.2000 . ... Credit: D. Williams, N. A. Sharp , AURA , NOAO , NSF Explanation: M19 appears to be a typical globular cluster of stars - except for its shape. ... M19 lies about 27,000 light-years away, measures about 60 light-years across, and is home to over 100,000 stars. ... Publications with keywords: M1 - cluster - M19 - globular cluster . Publications with words: M1 - cluster - M19 - globular cluster . ... M13: The Great Globular Cluster in Hercules . Globular Star Cluster M3 . ...
[ Сохраненная копия ]  Ссылки http://www.astronet.ru/db/xware/msg/1166673 -- 14.8 Кб -- 15.03.2001
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10. The Gravimagnetic Parameter
... The parameter y   characterizes the ratio between the gravitational and magnetic ``properties'' of a star and will, therefore, be called the gravimagnetic parameter . Two magnetic rotators having quite different magnetic fields, subjected to different external conditions but with identical gravimagnetic parameters, have similar magnetospheres, as long as the accretion rate is quite low ( ). ... For isolated rotators, the accretion rate  yr is assumed. ...
[ Сохраненная копия ]  Ссылки http://xray.sai.msu.ru/~mystery/articles/review/node24.html -- 6.9 Кб -- 25.02.1997
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11. APOD: 2000 July 19 - Globular Cluster M19
... 2000 July 19 . Globular Cluster M19 . ... Explanation: M19 appears to be a typical globular cluster of stars - except for its shape. ... In fact, M19 is the most aspherical globular cluster of the approximately 160 known orbiting the center of our Milky Way Galaxy . M19 lies about 27,000 light-years away, measures about 60 light-years across, and is home to over 100,000 stars. The cluster can be found with binoculars towards the constellation of Ophiuchus . ... About APOD | ...
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/apod/ap000719.html -- 4.6 Кб -- 01.10.2012
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