دانلود کتاب خارجی - دانلود رایگان کتاب لاتین PDF علمی

تعداد نتایج: 1581

Black Hole Gravitohydromagnetics

By Brian Punsly
Publisher: Springer Science & Business Media, 2013-03-09
Pages: 411
Language: en
ISBN_13:9783662044094
ISBN_10:3662044099
Subject: Science

The Nature of Unidentified Galactic High-Energy Gamma-Ray Sources

Proceedings of the Workshop held at Tonantzintla, Puebla, Me...

جزئیات و درخواست

By Alberto Carramiñana, Olaf Reimer, David J. Thompson
Publisher: Springer Science & Business Media, 2012-12-06
Pages: 358
Language: en
ISBN_13:9789401010078
ISBN_10:9401010072
Subject: Science

Fluctuating Paths And Fields - Festschrift Dedicated To Hagen Kleinert On The Occasion Of His 60th Birthday

جزئیات و درخواست

By Michael Bachmann, Wolfhard Janke, Axel Pelster, Hans-jurgen Schmidt
Publisher: World Scientific, 2001-06-04
Pages: 874
Language: en
ISBN_13:9789814490849
ISBN_10:9814490849
Subject: Science

Introduction to Black Hole Astrophysics

جزئیات و درخواست

By Gustavo E. Romero, Gabriela S. Vila
Publisher: Springer, 2013-09-14
Pages: 326
Language: en
ISBN_13:9783642395963
ISBN_10:3642395961
Subject: Science

The Formation and Disruption of Black Hole Jets

جزئیات و درخواست

By Ioannis Contopoulos, Denise Gabuzda, Nikolaos Kylafis
Publisher: Springer, 2014-11-10
Pages: 273
Language: en
ISBN_13:9783319103563
ISBN_10:3319103563
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

Quasars at All Cosmic Epochs

$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

Official Gazette of the United States Patent and Trademark Office

Patents

Free Epub

جزئیات و درخواست

By United States. Patent and Trademark Office
2001
Pages: 1376
Language: en
OTHER:PSU:000066182894
Subject: Patents

Lighthouses of the Universe: The Most Luminous Celestial Objects and Their Use for Cosmology

Proceedings of the MPA/ESO/MPE/USM Joint Astronomy Conferenc...

جزئیات و درخواست

By Marat Gilfanov, Rashid Sunyaev, Eugene Churazov
Publisher: Springer Science & Business Media, 2002-08-06
Pages: 642
Language: en
ISBN_10:354043769X
ISBN_13:9783540437697
Subject: Science

From Broadway to the Bowery

A History and Filmography of the Dead End Kids, Little Tough...

جزئیات و درخواست

By Leonard Getz
Publisher: McFarland, 2015-05-07
Pages: 365
Language: en
ISBN_13:9780786487424
ISBN_10:0786487429
Subject: Performing Arts

Black Holes

A Bibliography with Indexes

جزئیات و درخواست

By Lawrence A. Jameson
Publisher: Nova Publishers, 2002
Pages: 154
Language: en
ISBN_10:1590332873
ISBN_13:9781590332870
Subject: Science

Relativistic Astrophysics and Cosmology – Einstein’s Legacy

Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conferenc...

جزئیات و درخواست

By Bernd Aschenbach, Vadim Burwitz, Günther Hasinger, Bruno Leibundgut
Publisher: Springer Science & Business Media, 2007-10-20
Pages: 527
Language: en
ISBN_13:9783540747130
ISBN_10:3540747133
Subject: Science

Polymeric Thermosetting Compounds

Innovative Aspects of Their Formulation Technology

جزئیات و درخواست

By Ralph D. Hermansen
Publisher: CRC Press, 2017-03-16
Pages: 407
Language: en
ISBN_13:9781771883153
ISBN_10:1771883154
Subject: Science

Black Hole Astrophysics

The Engine Paradigm

جزئیات و درخواست

By David L. Meier
Publisher: Springer Science & Business Media, 2012-07-27
Pages: 941
Language: en
ISBN_13:9783642019364
ISBN_10:3642019366
Subject: Science

Scientific and Technical Aerospace Reports

Free Epub

جزئیات و درخواست

1989
Pages: 988
Language: en
OTHER:UIUC:30112075701711
Subject: Aeronautics

New Scientist

جزئیات و درخواست

2004
Pages: 894
Language: en
OTHER:UCSD:31822022878706
Subject: Science

The British National Bibliography

جزئیات و درخواست

By Arthur James Wells
2001
Pages: 1864
Language: en
OTHER:UOM:39015079755792
Subject: Bibliography, National

Chemistry and Industry

جزئیات و درخواست

1997
Pages: 556
Language: en
OTHER:UCSD:31822022729800
Subject: Chemistry, Technical

Science

جزئیات و درخواست

By John Michels (Journalist)
2004
Pages: 618
Language: en
OTHER:IND:30000121318228
Subject: Science

International Aerospace Abstracts

جزئیات و درخواست

1991
Pages: 838
Language: en
OTHER:STANFORD:36105007165462
Subject: Aeronautics

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