On The Winds Of Quasars

Author : T. A. Bruno
Publisher : Tom Bruno Author
ISBN 13 : 9781734647068
Total Pages : 356 pages
Book Rating : 4.6X/5 ( download)

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Download or read book On the Winds of Quasars written by T. A. Bruno and published by Tom Bruno Author. This book was released on 2021-09-20 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thrilling sequel to In the Orbit of Sirens THE WORLD OF KAMARIA WILL NEVER BE THE SAME. In the aftermath of the brutal slaying of a sacred auk'nai deity, Cade and Nella Castus are taken from their home and brought deep into the wilderness. They must make their way back to civilization, traversing dangerous landscapes as they are pursued relentlessly by their captor-a winged abomination. As Denton and Eliana search for their missing children, they uncover something that will change life on Kamaria forever.

Author : Mauro D'Onofrio
Publisher : Springer Science & Business Media
ISBN 13 : 364227563X
Total Pages : 613 pages
Book Rating : 4.30/5 ( download)

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Download or read book Fifty Years of Quasars written by Mauro D'Onofrio and published by Springer Science & Business Media. This book was released on 2012-06-30 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Formatted as a series of interviews with noted researchers in the field, this book reviews the history of quasar research and describes how advances in instrumentation and computation have aided quasar astronomy and changed our basic understanding of quasars.

Author : James Matthews
Publisher : Springer
ISBN 13 : 3319591835
Total Pages : 210 pages
Book Rating : 4.34/5 ( download)

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Download or read book Disc Winds Matter written by James Matthews and published by Springer. This book was released on 2017-08-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the application of a Monte Carlo radiative transfer code to accretion disc winds in two types of systems spanning 9 orders of magnitude in mass and size. In both cases, the results provide important new insights. On small scales, the presence of disc winds in accreting white dwarf binary systems has long been inferred from the presence of ultraviolet absorption lines. Here, the thesis shows that the same winds can also produce optical emission lines and a recombination continuum. On large scales, the thesis constructs a simple model of disc winds in quasars that is capable of explaining both the observed absorption and emission signatures – a crucial advance that supports a disc-wind based unification scenario for quasars. Lastly, the thesis also includes a theoretical investigation into the equivalent width distribution of the emission lines in quasars, which reveals a major challenge to all unification scenarios.

Author : Paul Hutchins
Publisher : Imagination Publishing
ISBN 13 : 0981712339
Total Pages : 225 pages
Book Rating : 4.38/5 ( download)

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Download or read book The Secret Doorway written by Paul Hutchins and published by Imagination Publishing. This book was released on 2008-11 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pictorial drama of the creation of Heaven and Earth based upon the awe-inspiring photo images from the Hubble and Spitzer space telescopes. Author, Paul Hutchins uncovers a grand drama on a universal scale that has been playing out since the invention of the telescope. He poses the question, is this grand drama merely in response to an ancient invitation recorded in the Book of Isaiah? It states in Isaiah 40:26, ""Look up into the heavens."" Who created all the stars? Through the use of his imagination and the invention of the telescope, man has discovered a once secret doorway to a world beyond imagination. He has now, in this age of cutting edge technology developed flying space telescopes in his quest to know, how did we get here? What he has found has astounded him. Hutchins farther poses the question; if it took over 400 years of man’s imagination from when the telescope was invented, and countless other inventions including the Hubble and Spitzer space telescopes, to merely take photo images of the universe, then who’s imagination is responsible for the reality those photo images represent? As we peer through this doorway to the heavens and look upon these heavenly cosmic bodies, we find ourselves awed by their grandeur. The pressing question becomes too large to ignore. Who is responsible for all these things? Could it be that we are now peering into the mind of a supreme architect with an imagination far beyond that of mere mortals? Could we be peering into the mind of imagination supreme? Could it be that we have been brought to this point in history unbeknownst to ourselves and given this technology by the one who extended that ancient invitation recorded by Isaiah 2700 years ago?

Author : Paola Marziani
Publisher : Frontiers Media SA
ISBN 13 : 2889456048
Total Pages : 447 pages
Book Rating : 4.48/5 ( download)

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Download or read book Quasars at All Cosmic Epochs written by Paola Marziani and published by Frontiers Media SA. This book was released on 2018-10-05 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Author : International Astronomical Union. Colloquium
Publisher : Cambridge University Press
ISBN 13 : 9780521852050
Total Pages : 540 pages
Book Rating : 4.56/5 ( download)

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Download or read book Probing Galaxies Through Quasar Absorption Lines (IAU C199) written by International Astronomical Union. Colloquium and published by Cambridge University Press. This book was released on 2005-12 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Review of recent research in the field of quasar absorption line systems.

Author :
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4./5 ( download)

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Download or read book Popular Science written by and published by . This book was released on 2003-07 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

Author : Lex Kaper
Publisher : Springer Science & Business Media
ISBN 13 : 3540685979
Total Pages : 426 pages
Book Rating : 4.75/5 ( download)

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Download or read book Cyclical Variability in Stellar Winds written by Lex Kaper and published by Springer Science & Business Media. This book was released on 2013-06-05 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that stellar winds are variable, and the fluctuations are often cyclical in nature. This property seems to be shared by the winds of cool and hot stars, even though their outflows are driven by fundamentally different physical mechanisms. Since very similar models have been proposed to explain the cyclical wind variations observed in a wide variety of stars, the time was ripe for astrophysicists from many different sub-disciplines to present the state of the art in a concise form. The proceedings will provide a useful, up-to-date overview of the observations, interpretation, and modelling of the time-dependent mass outflows from all sorts of stars.

Author : David Levy
Publisher : Macmillan
ISBN 13 : 0312254539
Total Pages : 420 pages
Book Rating : 4.37/5 ( download)

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Download or read book The Scientific American Book of the Cosmos written by David Levy and published by Macmillan. This book was released on 2000-11-22 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the mysteries of the universe in a collection of essays by some of the world's leading scientists, who address fundamental concepts of cosmology ranging from the Big Bang to the atomic structure of life on Earth

Author : Gerhard Klare
Publisher : Springer Science & Business Media
ISBN 13 : 3642762387
Total Pages : 378 pages
Book Rating : 4.83/5 ( download)

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Download or read book Accretion and Winds written by Gerhard Klare and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to bring the scientific events of the meetings of the Astronomische Gesellschaft (AG) to the attention of the worldwide astronomical community, an annual publication, Reviews in Modern Astronomy, was established. It is devoted exclusively to . the invited reviews, the Karl Schwarz schild lectures, and the high light contributions from leading scientists reporting on recent progress and scientific achievements at their respective institutes. This third volume continues the yearbook series of publications of the society. It comprises the complete set of contributions presented during the spring meeting of the AG at Berlin in March 1990, which was dedicated to the topic "Accretion and Winds". In addition four latecomers (two review and two highlight papers) delivered at the fall meeting at Graz, Austria in September 1989 close this volume. Heidelberg, September 1990 G: Klare Contents Some New Elements in Accretion Disk Theory By F. Meyer (With 5 Figures) . . . . . . . . . . . . . . . . . . . . . . . 1 Mass Transfer and Evolution in Close Binaries By A. R. King (With 4 Figures) . . . . . . . . . . . . . . . . . . . . . . . 14 Radiation Hydrodynamics of the Boundary Layer of Accretion Disks in Cataclysmic Variables By W. Kley (With 6 Figures) . . . . . . . . . . . . . . . . . . . . . . . . 21 Curious Observations of Cataclysmic Variables By F. V. Hessman (With 10 Figures) . . . . . . . . . . . . . . . . . . . 32 Accretion in AM Herculis Stars 44 By A. D. Schwope (With 12 Figures) X-ray Diagnostics of Accretion Disks By G. Hasinger (With 12 Figures) . . . . . . . . . . . . . . . . . . . . . 60 Accretion Phenomena at Neutron Stars By A. Rebetzky, H. Herold, U. Kraus, H. -P. Nollert, and H. Ruder (With 13 Figures) . . . . . . . . . . . . . . . . . . . . . .