... We consider stars with a constant (solar) initial chemical composition. Before the Roche lobe overflow, the components evolve as single stars (see for details LPP96). ... If the mass transfer onto a normal star occurs on a time-scale ten time shorter than the thermal Kelvin-Helmholz time for this star or a compact star is engulfed by a giant companion (e.g. as a result of the kick), the common envelope (CE) stage of the binary evolution is set in (Paczynski 1976). ...

... 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 . ...

Next: MASSES Up: EXTREME HELIUM STARS: PULSATION Previous: STELLAR PROPERTIES . ... Following main-sequence evolution, a red giant star in a close binary system may expand to fill its Roche lobe. ... Although Iben & Tutukov (1984) used this model to account for the EHes, the latter are not binaries (Jeffery et al. ... Final helium-shell flash in a post-AGB star. ... Accretion from the disk onto the surviving WD creates a star with a degenerate CO core and a helium envelope. ... Other models. ...

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

. Next: Eccentricities of pulsar orbits Up: Binary Neutron Stars Previous: Evolution in massive binaries . љ . љ љ . Figure 46: . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

... We have simulated the observations of a very distant cluster of galaxies at high redshift. ... The simulations are made for the HST instruments FOC, WFPC II, and the Advanced Camera, and for an 8-m telescope on the ground equipped with adaptive optics. ... A comparison of the fields of view of post-COSTAR HST imaging instruments with the Advanced Camera (AC) and the ground-based adaptive optics camera (AO) is shown in Fig. 1 superimposed on the noise-free cluster simulation. ...

BSc thesis "Metallicity Gradients of Elliptical Galaxies", 1997, Univ. of Tokyo . MSc thesis "Low-Metallicity Inhibition of Type Ia Supernovae and Galactic and Cosmic Chemical Evolution", 1999, Univ. of Tokyo . PhD thesis "Formation and Chemodynamical Evolution of Galaxies", 2002, Univ. of Tokyo . ... Cosmic SFRs, chemical evolution, mass-dependent galactic winds, and the mass-metallicity relation of galaxies are reproduced (Kobayashi, Springel, White 06). ... What are dwarf galaxies? ...

... 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 . ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

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... Science Users Information > Science and Technical Meetings > Conferences 2010 > The Origin and Fate of the Sun: Evolution of Solar-mass Stars Observed with High Angular Resolution . ... Observing Facilities . ... Observing with ESO Telescopes . ... The goal of this workshop is to review recent results on solar-mass stars obtained with infrared and millimeter interferometers, and to discuss their importance for our understanding of stellar evolution from star formation to stellar end products. ...

... HI mass fractions Comparison samples HeViCS bright galaxy Catalogue(BGC) Davies+2012 Average scaling relations for HI-normal and extremely HI-deficient galaxies in H3 survey (Gavazzii+ 2013 ) Dwarf galaxy survey (DGS) Madden+ 2013 KINGFISH Kennicutt 2011 Specific star formation rates Schiminovich +2007 Comparison samples HeViCS bright galaxy Catalogue(BGC) Davies+2012 Dwarf galaxy survey (DGS) Madden+ 2013 KINGFISH Kennicutt 2011 Dust ...

... Sunday , October 6, 2013 Standard quasar-like AGN Standard AGN have: · · · · · Luminous accretion disk (with X-ray corona) Bright line emission (ionised by disk) Dusty obscuring torus (emits in IR/sub-mm) Orientation-dependent observed properties Sometimes, extended radio jets Sunday , October 6, 2013 Another class of AGN Other AGN , exemplified by weak radio ... Sunday, October 6, 2013 Summary · · · · · · Not all AGN follow the "standard" accretion disk picture. ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The S un Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic ... Low mass stars live and die differently than high mass stars. ...

... Wind from a Black Hole . ... 1.07.2006 . ... Credit: M. Weiss ( CXC ), NASA Explanation: Binary star system GRO J1655-40 consists of a relatively normal star about twice as massive as the Sun co-orbiting with a black hole of about seven solar masses . ... But it also includes a wind of material escaping from the black hole's accretion disk . ... Publications with keywords: black hole - accretion disk - magnetic field . Publications with words: black hole - accretion disk - magnetic field . ...

HIGH MASS X-RAY BINARIES AND RECENT STAR FORMATION HISTORY P. Shtykovskiy 1 1,2 and M. Gilfanov 2,1 Space Research Institute of Russian Academy of Sciences, Moscow, Russia 2 Max-Planck-Institut fur Astrophysik, Garching b. Munchen, Germany Ё Ё ABSTRACT Based on the XMM-Newton observations of Magellanic Clouds we consider the dependence of population of high mass X-ray binaries on the recent star formation history in the host galaxy. ... HMXBS AND RECENT STAR FORMATION IN MAGELLANIC CLOUDS 4.1. ...

... Behemoth black hole found in an unlikely place . ... Spectacularly bright object in Andromeda caused by "normal" black hole . ... A spectacularly bright object recently spotted in one of the Milky Wayт??s neighboring galaxies is the result of a т??normalт?? stellar black hole, astronomers have found. ... Other scientists say ULXs are caused by material being dragged in by an intermediate-sized black hole formed from the merger of many stellar-mass black holes т?? about 1,000 times bigger than the...

... arXiv.org . astro-ph . ... We fit the near-infrared to radio spectral energy distributions of 30 luminous and ultra-luminous infrared galaxies with pure starburst models or models that include both starburst and AGN components to determine important physical parameters for this population of objects. In particular we constrain the optical depth towards the luminosity source, the star formation rate, the star formation efficiency and the AGN fraction. ...

... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

... 2007 March 5 . Illusion and Evolution in Galaxy Cluster Abell 2667 . ... Explanation: What's happening to the galaxies of cluster Abell 2667? ... To start, most of the yellowish objects in the above image from the Hubble Space Telescope are galactic members of a massive cluster of galaxies known as Abell 2667 . ... Light from this galaxy is gravitationally lensed by Abell 2667, appearing much like a distant person would appear through a wine glass. ... About APOD | ...