We present the discovery of debris systems around three Sun-like stars based on observations performed with the Spitzer Space Telescope as part of a Legacy Science Program, ``The Formation and Evolution of Planetary Systems'' (FEPS). We also confirm the presence of debris around two other stars. ... ADS Citation Query . citations = 55 . citations vs. year [year,citations] . ...

Next: The evolution equation Up: ``Ecology'' of Magnetic Rotators Previous: The Gravimagnetic Parameter . ... Such an approach to the evolution was developed in the 1970s by Schwartzman (1970a)[ 173 ], Bisnovatyi-Kogan and Komberg (1974, 1975)[ 15 , 16 ], Illarionov and Sunyaev (1975)[ 76 ], Shakura (1975)[ 178 ], Wickramasinghe and Whelan (1975)[ 212 ], Lipunov and Shakura (1976)[ 109 ], Savonije and van den Heuvel (1977)[ 171 ] and others. ... The evolution equation . ...

... Galaxy Evolution home . ... Regulating the ISM and star formation . Cosmological evolution of star-forming galaxies . The origin and evolution of radio sources . Radio sources and their environments . ... Observations of the local Universe clearly demonstrate that very active star formation phases (starbursts) are often associated with interacting and merging galaxies and that in these systems much of the short wavelength emission is absorbed by dust and re-emitted in the IR. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

EVOLUTION OF GALACTIC DISCS: TWO MODES OF STAR FORMATION ABSTRACT We develop the model of the evolution of surface gas density, stellar density, star formation rates and chemical composition of galactic disc taking into account the gravitational instability of rotating gaseous layer in the scales of several kpc. ... In the model we took into account the gas return from evolved stars, a radial movement of the gas in a spiral arms and accretion of the gas into the galactic disc. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... We study the magnetic field structure and evolution for 26 X-ray brightening events in coronal holes and quiet Sun regions, including bright points and jets. We found that all brightening events are associated with bipolar regions and caused by magnetic flux emergence followed by cancellation. ... Comparing coronal holes and the quiet Sun, we do not find differences in their corresponding magnetic field behavior. ...

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Late Stages of Stellar Evolution . Welcome to the home page of the Late Stages of Stellar Evolution" We are a research group which operates within the Astrophysics Group of the Australia Telescope National Facility. ... To investigate the late stages of stellar evolution and in particular the role of stellar mass-loss in the evolution of asymptotic giant branch stars, proto-planetary nebulae and extremely massive stars. ...

Family ASTRO was initially developed to expand the ASP?s flagship program Project ASTRO?, which has partnered thousands of volunteer amateur and professional astronomers around the country with classroom teachers and students in their communities. ... Since then, we?ve trained not only many Project ASTRO partners, but also hundreds of other educators across the country to use our series of Leader Kits and Take-Home Activities to lead fun, hands-on Astronomy Events in their communities. ...

... Laboratory "Structure" was created in 1992 from the temporary scientific group formed in 1988 in SAO RAS. In December 2003 it was transformed into group of Physics and Evolution of Galaxies , which enters into new Laboratory of Extragalactic ASTROPHYSICS and COSMOLOGY. ... Kniazev A.Y. senior researcher, associated foreign member . Kniazeva T.F. junior researcher, associated foreign member . ... Lipovetsky Valentin A. (1945-1996) former leader of the Laboratory . ...

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...

The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...

... CB3 0HA, U.K. The UCDs (Unified Content Descriptors) were first developed in the ESO/CDS data mining project, to describe precisely the contents of the individual fields (columns) of tables available from a data center. ... We present different applications of UCDs: selection of catalogues, based on their content; identification of catalogues having similar fields; automated data conversion allowing direct comparison of data in cross-identifications. ... a definition of the corresponding UCD; . ...

... 2000, ApJ, 537, L49 . ... F. Palla . Invited Talk at the IAU Symposium 200 "The formation of binary stars" eds. R.D. Mathieu and H. Zinnecker (ASP Conf. Ser.) in press . Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices . ... 2000, A , in press . ... 2000, ApJ, in press . ... 2000, ApJ, in press (Sept. ... 2000, ApJ Lett., in press . ... Click to examine publications from other years . ... Star Formation Group . ... Arcetri Home Page . ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: ALMACAL: the evolution of the molecular gas in galaxies using ALMA calibrator observations . ... ALMA . ... ESO-MIDAS . ... It is therefore essential to probe the evolution of cold gas over cosmic time. ... We are looking for an enthusiastic PhD student who is interested in working with us in using ALMACAL to address exciting and topical science questions related to the evolution of molecular gas in galaxies. ...

... The acquisition data base of meteorological temporal data including systematic and chronologic cataloque for Global Tropical Cyclogenesis (on the whole of World Ocean's aquatorium) for 1983-1992 time interval is developed and based on personal computer IBM PC/AT. ... The data base consists of the following units: 1. ... This data base offers a unique opportunity to analyze macro- and synoptic-scale temporal features of global tropical cyclogenesis as indivisible physical process. ...

... We are developing the following problems: a) combine optical and microwave technic to the indication of non-linear surface waves and wave breaking field; b) modelling of microwave propagation in a multiphase air-water interface; c) obtain quantitative dependencies of microwave radiation on geometry and statistics of wave breaking field in ocean surface; d) monitoring of ocean surface states using optical amd microwave airspace data sets. ... Important issue is spray and underwater bubbles. ...

... Future seminars . P a s t seminars . Seminar council . Dynamic tides in exoplanetary systems and the problem of formation of 'Hot Jupiters' " . P.B. Ivanov (Astro Space Center of LPI RAS) . ... The developed theory will be applied to the problem of formation of 'Hot Jupiters' - giant planets having quite small orbital periods of the order of a few days and orbital planes, which can be misaligned with equatorial plane of the host star. ...

... Extragalactic Surveys . I will review our current understanding of the history of supermassive black hole accretion from deep and wide-area X-ray surveys. ... Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments . ... Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution . ... Deep X-ray surveys are providing crucial information on the evolution of AGN and galaxies. ... The luminosity function and evolution of normal galaxies . ...

... The HI - Star Formation Connection . ... Coffee . ... Dark Galaxies and Dark Matter . ... HI in Normal Galaxies . HI and Galaxy Evolution over Cosmic Time . ... How Galaxies Accrete Gas . ... The Billion Galaxy Survey . ... Searches for Dark Galaxies . ... Evidence for Dark Matter in Galaxies . HI in Galaxies: Overview . ... Open Questions in Normal Galaxies . ... Starburst galaxies and BCDs . ... HI Rich Galaxies . ... Open Questions in HI and Galaxy Evolution . HI and Galaxy Evolution . ...

... The analysis shows, that asteroid ґ rubble pile loses its fast fragments in no time but the retaining fragments forms a compact structure immersed in dust ґ gas atmosphere, created by interaction of interplanetary medium with dispersed product of collisional evolution of asteroid. By interaction of an asteroid ґ rubble pile with interplanetary medium structures asteroid can increase its brightness on account of blowed up dust simulating phenomenon of distant comet's brightening. ...