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تعداد نتایج: 1180

General Relativity And Gravitational Physics - Proceedings Of The 10th Italian Conference

By Massimo Cerdonio, Riccardo D'auria, Mauro Francaviglia, G Magnano
Publisher: World Scientific, 1994-03-30
Pages: 694
Language: en
ISBN_13:9789814551564
ISBN_10:9814551562

Annual Report

جزئیات و درخواست

By Physical Research Laboratory (Ahmadābād, India)
2000
Pages: 122
Language: en
OTHER:CHI:76146495
Subject: Geophysics

The Physics of Accretion onto Black Holes

جزئیات و درخواست

By Maurizio Falanga, Tomaso Belloni, Piergiorgio Casella, Marat Gilfanov, Peter Jonker
Publisher: Springer, 2014-10-28
Pages: 483
Language: en
ISBN_13:9781493922277
ISBN_10:1493922270
Subject: Science

Gravitation and Astrophysics

On the Occasion of the 90th Year of General Relativity : Pro...

جزئیات و درخواست

By James M. Nester, Chiang-Mei Chen, Jong-Ping Hsu
Publisher: World Scientific, 2007
Pages: 433
Language: en
ISBN_13:9789812772923
ISBN_10:9812772928
Subject: Science

Investigation of Fundamental Black Hole Properties of AGN Through Optical Variability

جزئیات و درخواست

By Wesley Thomas Ryle
2008
Language: en
OTHER:OCLC:256955423
Subject: Active galactic nuclei

Populations of High-Energy Sources in Galaxies (IAU S230)

جزئیات و درخواست

By International Astronomical Union. Symposium
Publisher: Cambridge University Press, 2006-06-15
Pages: 520
Language: en
ISBN_10:0521852013
ISBN_13:9780521852012
Subject: Science

The Central Engine of Active Galactic Nuclei

Proceedings of a Workshop Held at Xi'an Jiaotong University,...

جزئیات و درخواست

By Luis C. Ho, Jian-Min Wang
2007
Pages: 830
Language: en
OTHER:UOM:39015070953297
Subject: Science

Optical and Infrared Detectors for Astronomy

21-22 June, 2004, Glasgow, Scotland, United Kingdom

جزئیات و درخواست

By James David Garnett, James W. Beletic
Publisher: SPIE-International Society for Optical Engineering, 2004
Pages: 576
Language: en
OTHER:UOM:39015061379973
Subject: Science

The Jet Paradigm

From Microquasars to Quasars

جزئیات و درخواست

By Tomaso Belloni
Publisher: Springer, 2009-12-21
Pages: 296
Language: en
ISBN_13:9783540769378
ISBN_10:3540769374
Subject: Science

Science With The New Generation Of High Energy Gamma-ray Experiments - Proceedings Of The Third Workshop

جزئیات و درخواست

By Oriana Mansutti, Alessandro De Angelis
Publisher: World Scientific, 2006-05-30
Pages: 228
Language: en
ISBN_13:9789814477949
ISBN_10:981447794X
Subject: Science

Active Galactic Nuclei

جزئیات و درخواست

By Ian Robson
Publisher: Wiley-Blackwell, 1996
Pages: 420
Language: en
OTHER:UOM:39015037827113
Subject: Science

Physics Briefs

Physikalische Berichte

جزئیات و درخواست

1993
Pages: 1420
Language: en
OTHER:UOM:39015027828634
Subject: Physics

High Energy Blazar Astronomy

Proceedings of an International Conference Held to Celebrate...

جزئیات و درخواست

By Leo O. Takalo, Esko Valtaoja
2003
Pages: 376
Language: en
OTHER:UOM:39015052872978
Subject: Science

Variability of Galactic and Extragalactic X-ray Sources

Proceedings of an International Symposium Held in Villa Olmo...

جزئیات و درخواست

By Aldo Treves
1987
Pages: 308
Language: en
OTHER:UCAL:B4371309
Subject: X-ray astronomy

Supermassive Black Holes

جزئیات و درخواست

By Minas Kafatos
Publisher: CUP Archive, 1988-02-18
Pages: 408
Language: en
ISBN_10:0521342465
ISBN_13:9780521342469
Subject: Science

Proceedings of the Third Workshop on Science with the New Generation of High Energy Gamma-ray Experiments

Cividale Del Friuli, Italy, 30 May-1 June 2005

جزئیات و درخواست

By Alessandro De Angelis, Oriana Mansutti
Publisher: World Scientific, 2006
Pages: 228
Language: en
ISBN_13:9789812568137
ISBN_10:9812568131
Subject: Science

Sixteenth Marcel Grossmann Meeting, The: On Recent Developments In Theoretical And Experimental General Relativity, Astrophysics, And Relativistic Field Theories - Proceedings Of The Mg16 Meeting On General Relativity (In 4 Volumes)

جزئیات و درخواست

By Remo Ruffini, Gregory Vereshchagin
Publisher: World Scientific, 2022-12-15
Pages: 4880
Language: en
ISBN_13:9789811269783
ISBN_10:9811269785
Subject: Science

Indian Science Abstracts

جزئیات و درخواست

2003-03
Pages: 866
Language: en
OTHER:UCBK:C086062716
Subject: Science

Issues in Astronomy and Astrophysics: 2012 Edition

جزئیات و درخواست

Publisher: ScholarlyEditions, 2013-01-10
Pages: 734
Language: en
ISBN_13:9781481645539
ISBN_10:1481645536
Subject: Science

$The last 50 years have seen a tremendous progress in the research on quasars. From a time when quasars were unforeseen oddities, we have come to a view that considers quasars as active galactic nuclei, with nuclear activity a coming-of-age experienced by most or all galaxies in their evolution. We have passed from a few tens of known quasars of the early 1970s to the 500,000 listed in the catalogue of the Data Release 14 of the Sloan Digital Sky Survey. Not surprisingly, accretion processes on the central black holes in the nuclei of galaxies — the key concept in our understanding of quasars and active nuclei in general — have gained an outstanding status in present-day astrophysics. Accretion produces a rich spectrum of phenomena in all bands of the electromagnetic spectrum. The power output of highly-accreting quasars has impressive effects on their host galaxies. All the improvement in telescope light gathering and in computing power notwithstanding, we still miss a clear connection between observational properties and theory for quasars, as provided, for example, by the H-R diagram for stars. We do not yet have a complete self-consistent view of nuclear activity with predictive power, as we do for main-sequence stellar sources. At the same time quasars offer many “windows open onto the unknown". On small scales, quasar properties depend on phenomena very close to the black hole event horizon. On large scales, quasars may effect evolution of host galaxies and their circum-galactic environments. Quasars’ potential to map the matter density of the Universe and help reconstruct the Universe’s spacetime geometry is still largely unexploited. The times are ripe for a critical assessment of our present knowledge of quasars as accreting black holes and of their evolution across the cosmic time. The foremost aim of this research topic is to review and contextualize the main observational scenarios following an empirical approach, to present and discuss the accretion scenario, and then to analyze how a closer connection between theory and observation can be achieved, identifying those aspects of our understanding that are still on a shaky terrain and are therefore uncertain knowledge. This research topic covers topics ranging from the nearest environment of the black hole, to the environment of the host galaxies of active nuclei, and to the quasars as markers of the large scale structure and of the geometry of spacetime of the Universe. The spatial domains encompass the accretion disk, the emission and absorption regions, circum-nuclear starbursts, the host galaxy and its interaction with other galaxies. Systematic attention is devoted to some key problems that remain outstanding and are clearly not yet solved: the existence of two quasar classes, radio quiet and radio loud, and in general, the systematic contextualization of quasar properties the properties of the central black hole, the dynamics of the accretion flow in the inner parsecs and the origin of the accretion matter, the quasars’ small and large scale environment, the feedback processes produced by the black hole into the host galaxy, quasar evolutionary patterns from seed black holes to the present-day Universe, and the use of quasars as cosmological standard candles. The timing is appropriate as we are now witnessing a growing body of results from major surveys in the optical, UV X, near and far IR, and radio spectral domains. Radio instrumentation has been upgraded to linear detector — a change that resembles the introduction of CCDs for optical astronomy — making it possible to study radio-quiet quasars at radio frequencies. Herschel and ALMA are especially suited to study the circum-nuclear star formation processes. The new generation of 3D magnetohydrodynamical models offers the prospective of a full physical modeling of the whole quasar emitting regions. At the same time, on the forefront of optical astronomy, applications of adaptive optics to long-slit spectroscopy is yielding unprecedented results on high redshift quasars. Other measurement techniques like 2D and photometric reverberation mapping are also yielding an unprecedented amount of data thanks to dedicated experiments and instruments. Thanks to the instrumental advances, ever growing computing power as well as the coming of age of statistical and analysis techniques, the smallest spatial scales are being probed at unprecedented resolution for wide samples of quasars. On large scales, feedback processes are going out of the realm of single-object studies and are entering into the domain of issues involving efficiency and prevalence over a broad range of cosmic epochs. The Research Topic "Quasars at all Cosmic Epochs" collects a large fraction of the contributions presented at a meeting held in Padova, sponsored jointly by the National Institute for Astrophysics, the Padova Astronomical Observatory, the Department of Physics and Astronomy of the University of Padova, and the Instito de Astrofísica de Andalucía (IAA) of the Consejo Superiór de Investigación Cientifica (CSIC). The meeting has been part of the events meant to celebrate the 250th anniversary of the foundation of the Padova Observatory.$

جزئیات و درخواست

By Paola Marziani, Mauro D'Onofrio, Ascensión del Olmo, Deborah Dultzin
Publisher: Frontiers Media SA, 2018-10-05
Pages: 447
Language: en
ISBN_13:9782889456048
ISBN_10:2889456048

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