... ESO, the European Southern Observatory . ... Quasars and Black Holes . ... This artistтАЩs impression shows the material ejected from the region around the supermassive black hole in the quasar SDSS J1106+1939. This object has the most energetic outflows ever seen, at least five times more powerful than any that have been observed to date. ... Many blast huge amounts of material out into their host galaxies, and these outflows play a key role in the evolution of galaxies. ... SDSS J1106+1939 . ...

The 2dF QSO Redshift Survey (2QZ) . ... Before jumping into all the finer details of teh survey, a brief non-astronomer's guide to redshift surveys is available. ... The primary scientific aims of the QSO survey are: (1) to obtain the primordial fluctuation power spectrum out to COBE scales, (2) to determine the rate of QSO clustering evolution in the non-linear and linear regimes and hence obtain new limits on the value of and the bias parameter, (3) to apply a powerful geometric method to measure . ...

. ArtistтАЩs impression of the huge outflow ejected from quasar SDSS J1106+1939. // Credit: ESO/L. Cal†зada

Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about quasars: . APOD: 2003 May 20 - A Primordial Quasar . ... The nearest quasars are now known to be supermassive black holes in the centers of galaxies . Gas and dust that falls toward a quasar glows brightly, sometimes outglowing the entire home galaxy. ... Explanation: Quasars (QUASi-stellAR objects) lie near the edge of the observable Universe . ... APOD: 1999 December 26 - Gamma-Ray Quasar . ...

Back to Martin Elvis' Home Page . Color 2-D figure of structure (postscript) . 3-D views of the quasar structure: . 3-D Top view 3-D End-on view 3-D Side view . ... Quasar Atmospheres: Toward a `Low' Theory of Quasars , (Elvis M. 2003 astro-ph/0311436 , to be published in AGN and the SDSS, eds. G. Richards and P. Hall) . Talk from the Leicester `Winds Tori' Workshop, Sept 2004 (pdf, 21 pages) . Disk Winds summary from the Leicester `Winds Tori' Workshop, Sept 2004 (pdf, 7 pages) . ...

... A Five Quasar Gravitational Lens . ... Credit: K. Sharon ( Tel Aviv U. ) and E. Ofek ( Caltech ), ESA , NASA Explanation: What's happening near the center of this cluster of galaxies? At first glance, it appears that several strangely elongated galaxies and fully five bright quasars exist there. In reality, an entire cluster of galaxies is acting as a gigantic gravitational lens that distorts and multiply-images bright objects that occur far in the distance. ... Galaxies Away . ...

Stellarium 0.12.3 . ... Plugins . ... FileљStructure . FileљList . FileљMembers . plugins . Quasars . src . Quasar.hpp . ... 19 љ #ifndef _QUASAR_HPP_ . 20 љ #define _QUASAR_HPP_ 1 . ... 39 љ class Quasar : public StelObject . ... 41 љ friend class Quasars ; . ... 44 љ Quasar ( const QVariantMap& map); . 45 љ ~ Quasar (); . ... 53 љ return "Quasar" ; . ... 103 љ #endif // _QUASAR_HPP_ . Generated on Sat Aug 10 2013 17:12:43 for Stellarium by љ 1.8.3.1 ...

... III (OCR by CDS, corrections by H.Andernach) The first results of a search at 1410 MHz for 243 extragalactic objects from the Southern Hemisphere identified as quasars by Veron-Cetty Veron (1983) in "A Catalogue of extragalactic Radio-Source Identifications" are reported. ... The data are from Parkes catalogue . ... These data were modified using 'A catalogue of Quasars and Active Nuclei (2nd Ed.)' (1985), 'A catalogue of Quasars and Active Nuclei (3rd Ed.)', (1980), all of them by Veron-Cetty Veron...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . des actualit†йs . des reportages . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil D†йcouverte de trois quasars qui fabriquent des mirages . ... 06/04/2016 - Le journal de bord de Thomas Pesquet (21) . ... 24/03/2016 - D†йcouverte de lacs et de rivi†иres sur Pluton . ...

... SAO researchers have discovered that supercritical accretion disks eject hot gas with a velocity of a few thousand kilometers per second. The supercritical regime of accretion onto black holes is very important for astrophysics. In the first half-billion years just after our Universe was born, supermassive black holes (quasars) began to appear and grow in centers of young galaxies. ... Gas falling onto a black hole (accretion) is not a frequent phenomenon in our Galaxy. ...

... We construct a composite quasar spectrum from 149 HST FOS spectra of 80 quasars with mean redshift . ... The continuum longward of 1000? can be modeled as a power law with . ... The break in the power--law index is a feature expected in Comptonized accretion--disk spectra. ... The spectral features in the sub--Ly region of AGN spectra provide critical insights into the physical processes around the central engine, and they become accessible to IUE and HST at intermediate redshift. ...

... Galaxy Evolution home . ... Micro quasars Publications . ... In the last few years a very similar phenomenon has been observed in some X-ray binaries, binary stellar systems with one gravitationally-compact object (black hole or neutron star) and an "normal" star part of whos atmosphere is captured by the compact object. ... The compact objects (a few solar masses) are much smaller than those inferred in AGN (10 9 solar masses), and the sizes much smaller, so the analogy may not be complete. ...

... Comparison of a synthetic radio image and quaтАж . ... Title: Comparison of a synthetic radio image and quasar 3C 48 . Description: Comparison of a synthetic radio image (left panel) derived from the movie "Movie 1" and a VLBI image of the qusar 3C 48 (the second quasar discovered). ... Comparison of a synthetic radio image and quasar 3C 48 Comparison of a synthetic radio image (left panel) derived from the movie "Movie 1" and a VLBI image of the qusar 3C 48 (the second quasar discovered). ...

Многофункциональный программный пакет QUASAR, созданный в Институте прикладной астрономии РАН, предназначен для массовой обработки РСДБ-наблюдений, выполненных на глобальных и региональных сетях станций. ... вычисление частных производных для всех параметров и сигналов; . ... оценивание всех сигналов, сессионных и глобальных параметров; . ... организация итерационного процесса с последовательным уточнением АКФ сигналов и/или глобальных параметров (координат станций и источников); . ...

... We present composite spectra of red and blue sub-samples of the PHFS quasars, and tabulate their emission line properties. The median H and [O III ] emission line equivalent widths of the red quasar sub-sample are a factor of ten weaker than those of the blue quasar sub-sample. ... Both the colours and the emission line equivalent widths of the red quasars can be explained by the addition of a featureless red synchrotron continuum component to an otherwise normal blue quasar spectrum. ...

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... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...

Next: Visitors and Seminars Up: Research Previous: M. de Groot, Consultant Contents . ... Zodiacal Cloud . ... The zodiacal cloud is a disc of dust orbiting within the inner planetary system. ... Existing models of the zodiacal cloud have always adopted an equilibrum assumption, in which the input from comet and asteroid disintegration balances the output from collisional grinding between the dust particles and their removal by the Poynting-Robertson effect. ...