Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

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• Publications of Dmitri Wiebe
• Future of the Galaxy
• Star Formation History

Find Similar Abstracts . ... The formation of galaxies in Friedmannian universes . ... 00/1974 . ... ASTROPHYSICS, COSMOLOGY, GALACTIC CLUSTERS, GALACTIC EVOLUTION, GRAVITATION THEORY, DENSITY DISTRIBUTION, GALACTIC ROTATION, GAS HEATING, GAS IONIZATION, PERTURBATION THEORY, TEMPERATURE DISTRIBUTION . ... 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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• Old neutron star distribution in the Galaxy
• X-ray Luminosity Evolution

... Next: Cheating Poisson: A Up: Statistical Analysis Previous: Spatial Models and . ... The spatial distribution of stars in the Local Group dwarf irregular galaxy NGC 6822 has been studied, using recent positions and deep photometry for about 15,000 stars in the galaxy. Based on photometrical data, OB stars and red stars could be studied separately. Spatial statistical tools have been applied to the analysis of the spatial structure. ... Figure: Model selection by the aid of CAIC . ...

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• Doing Theoretical Astrophysics With HST's Data Processing Pipeline Software:
• An Extragalactic Point Source Simulator for SIRTF Pipeline Testing
• ADASS 2003 Conference Proceedings

Astronomers at Armagh Observatory and Cardiff University have independently discovered new mechanisms by which micro-organisms may have spread throughout the Galaxy. Scientific papers on the topic by Professor Bill Napier at Armagh, and by Dr Max Wallis and Professor Chandra Wickramasinghe at Cardiff University, will appear simultaneously in the Monthly Notices of the Royal Astronomical Society . ... Cardiff scientists Max Wallis and Chandra Wickramasinghe have identified another delivery route. ...

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• M.D. Smith, Research Astronomer
• Abstract 218
• Research Interests

... 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

... V.V.Makarov, V.P.Reshetnikov, V.A.Yakovleva . Photometric study of the peculiar galaxy NGC 2685" . ... eds.), Tallinn, 1989, p.19 . ... Press, 1994, p.272-273 . ... A.A.Mullari, V.V.Orlov, St.Petersburg Univ. ... conference, St.Petersburg, 1997, p.168-169 . ... All-Russian Astronomical Conference, Book of Abstracts, . ... in "Astronomy: traditions, present, future", V.V.Orlov, V.P.Reshetnikov, N.Ya.Sotnikova (eds.), St.Petersburg University Press, 2007, p.92-115 (in Russian) . ...

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• The Stellar Content and Distance to the Nearby Blue Compact Dwarf Galaxy
• Astronomy Electronic Preprints and Publications
• Chemical evolution of galaxies: list of publications

... 323, P 659-673 (1997). Abstract . ... 323, P 674-684 (1997). ... Number counts and optical identifications of faint IRAS sources . ... 323, P 685-696 (1997). ... 323, P 697-706 (1997). ... 323, P 707-716 (1997). ... 323, P 717-726 (1997). ... 323, P 727-738 (1997). ... 323, P 739-748 (1997). ... 323, P 749-761 (1997). ... The [Fe/H] distribution of a volume limited sample of solar-type stars and its implications for galactic chemical evolution . ... helpdesk@link.springer.de . ...

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• Springer LINK:A&A-EE: Table of Contents Volume 319 Number 1 (1997)
• Springer LINK:A&A-EE: Table of Contents Volume 330 Number 3 (1998)
• Springer LINK:A&A-EE: Table of Contents Volume 323 Number 2 (1997)

... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4­5 Gyr than in the sparse ones. ...

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• http://sn.sai.msu.ru/~sil/preprints/postbr1.pdf

... Future seminars . P a s t seminars . Seminar council . Radiometric chronometers and time scales for the Galaxy, early Solar system, and terrestrial planets " . I. Tolstikhin ( Geological Institute, Kola Science Center ) . ... The earliest objects of the Solar system, refractory Ca-Al-rich inclusions (CAI) in chondritic meteorites, were probably formed in the innermost Solar nebula from a material composed by solar gas + fully vaporized dust. ...

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• A Brief History of Magnetospheric Physics Before the Spaceflight Era
• (S-7a) The Black Hole at the Center of our Galaxy

... Field of research: Extragalactic astronomy. ... NASA Astrophysics Data System (ADS) Abstract Service . ... CADC Home Page . ... CCD Images of Galaxies . ... RUSSIAN LINKS . ... UA Astronomy Personal Home Page - Bill Keel . ... The Shape of the Rotation Curves of Edge-on Galaxies, by A.V.Zasov and A.V.Khoperskov, 2003. ... A Thickness of Stellar Discs, by A.V.Zasov, and D.V.Bizyaev, 2003 . Minimum Velocity Dispersion in Stable Stellar Disks, by A.V.Khoperskov, A.V.Zasov, and N.V.Tyurina, 2003 . ...

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... Our Galaxy . ... Stars . ... We all love bright and showy spiral galaxies! So much so, that we tend to overlook the elliptical galaxies which make up about 30% of the galaxies out there. Smaller than spiral galaxies, elliptical galaxies may be full of stellar living fossils, surviving virtually unchanged from an older cosmic era. ... Elliptical galaxies are smaller than spiral galaxies, roughly spherical and full of old stars. ... We know that galaxies interact and even collide. ...

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• How do galaxies form? - New discovery from European Southern Observatory |
• Most distant galaxy ever seen | Astronotes
• Leonid meteors 2011 | Astronotes

General Forum Message . Forums: . ... Deep Space Object Galaxy Near M13 . ... Can anyone tell me if there is a DSO