Probing The Cosmic X Ray And Mev Gamma Ray Background Radiation Through The Anisotropy PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Probing The Cosmic X Ray And Mev Gamma Ray Background Radiation Through The Anisotropy PDF full book. Access full book title Probing The Cosmic X Ray And Mev Gamma Ray Background Radiation Through The Anisotropy.
| Author | : |
| Publisher | : |
| Total Pages | : 14 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Probing the Cosmic X-ray and MeV Gamma-ray Background Radiation Through the Anisotropy Book in PDF, ePub and Kindle
While the cosmic soft X-ray background is very likely to originate from individual Seyfert galaxies, the origin of the cosmic hard X-ray and MeV gamma-ray background is not fully understood. It is expected that Seyferts including Compton thick population may explain the cosmic hard X-ray background. At MeV energy range, Seyferts having non-thermal electrons in coronae above accretion disks or MeV blazars may explain the background radiation. We propose that future measurements of the angular power spectra of anisotropy of the cosmic X-ray and MeV gamma-ray backgrounds will be key to deciphering these backgrounds and the evolution of active galactic nuclei (AGNs). As AGNs trace the cosmic large-scale structure, spatial clustering of AGNs exists. We show that e-ROSITA will clearly detect the correlation signal of unresolved Seyferts at 0.5-2 keV and 2-10 keV bands and will be able to measure the bias parameter of AGNs at both bands. Once future hard X-ray all sky satellites achieve a sensitivity better than 10-12 erg cm-2 s-1 at 10-30 keV or 30-50 keV--although this is beyond the sensitivities of current hard X-ray all sky monitors--angular power spectra will allow us to independently investigate the fraction of Compton-thick AGNs in all Seyferts. We also find that the expected angular power spectra of Seyferts and blazars in the MeV range are different by about an order of magnitude, where the Poisson term, so-called shot noise, is dominant. Current and future MeV instruments will clearly disentangle the origin of the MeV gamma-ray background through the angular power spectrum.
| Author | : Menas Kafatos |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 569 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 9400901453 |
Download Examining the Big Bang and Diffuse Background Radiations Book in PDF, ePub and Kindle
IAU Symposium No. 168, Examining the Big Bang and Diffuse Background Radiations, took place on August 23-26, 1994 at the XXIInd IAU General Assembly in the Hague, Netherlands. The meeting attracted a large number - over 250 - of astronomers, reflecting the strong interest engendered by the great advances in cosmology made in recent years. There is still a multitude of unresolved problems in modern cosmology and the symposium offered a wonderful occasion to examine them objectively, at a place where many leading workers in related fields gathered together. After the introduction by IAU President L. Woltjer and the historical background by Vice Present Virginia Trimble, the volume begins with reviews of the cosmic microwave radiation from COBE (Cosmic Background Explorer). Reviews of recent observations then extend from radio to infrared, visible light, ultraviolet, X-rays and gamma-rays. It is followed by theoretical models for the Big Bang and Inflation, and alternative views to the Big Bang. Following a discourse on Probes and Future Tests, the meeting ended with a Panel Discussion on `Major Unsolved Problems of Cosmology'. Some forty-four contributed papers - both oral and poster reports - are included after the invited talks and panel discussions.
| Author | : Elizabeth J. Wills |
| Publisher | : |
| Total Pages | : 181 |
| Release | : 2018 |
| Genre | : Anisotropy |
| ISBN | : |
Download Probing Cosmic Ray Anisotropy with Atmospheric Neutrinos Book in PDF, ePub and Kindle
In the hundred years that have followed the discovery of cosmic rays, more about them remains unknown than known. Many concerted efforts are currently underway to detect cosmic rays using a variety of detection methods in space, on the surface of Earth, and deep underground. Of the many remaining mysteries, the one addressed in this work is the anisotropy in arrival directions of the cosmic rays incident on the atmosphere. This behaviour has been observed in both hemispheres of the planet, at high significance, from 1 TeV - 1 EeV energy ranges, at angular scales from 5 degrees to 180 degrees, and displays no time variation. It is measured consistently as a 0.1% over- and under-fluctuation. This work presents the first neutrino analysis of cosmic ray arrival directions so far, specifically, in the northern hemisphere. The analysis is done with an atmospheric neutrino dataset which was specifically designed for this analysis and composed of neutrinos detected by the IceCube South Pole Neutrino Observatory from 2011-2016. The goal of the search was to detect cosmic ray anisotropy as observed in atmospheric muons, but this time, in atmospheric neutrinos. To this end, a new atmospheric neutrino dataset was created using machine learning, aiming to increase data acceptance rates by optimizing sacrifices in purity and angular acceptance. The standard analysis techniques were carried out, along with a new log-likelihood method developed to improve sensitivity in a lower-statistics realm. While no signal was detected in this analysis, the analysis methodology has been developed and tested. We project that with a total of twelve years of IceCube data will be required to be sensitive to a dipole anisotropy at the level previously reported by the Tibet-AS[gamma] Collaboration. Detection of cosmic ray anisotropy in the neutrino channel would allow for verification of known cosmic ray shower physics, and particle propagation. The neutrinos could allow us to probe the anisotropy in a new way. If the signal deviates, there could be new physics to discover. The method and data selection are developed, and in several years, new developments will be made towards unraveling the mystery of cosmic ray anisotropy with neutrinos.
| Author | : Veniamin Sergeevich Berezinskiĭ |
| Publisher | : Elsevier Science & Technology |
| Total Pages | : 556 |
| Release | : 1990 |
| Genre | : Science |
| ISBN | : |
Download Astrophysics of Cosmic Rays Book in PDF, ePub and Kindle
This book is devoted to the astrophysics of cosmic rays, especially the origin of the cosmic rays observed on Earth. The problem of the propagation and acceleration of cosmic rays in the interstellar medium and, in general, in the galaxy is discussed. Topics of gamma- and X-ray astronomy and of high-energy neutrino astronomy related to cosmic rays are also discussed. Summaries of the observational and experimental results are given."
| Author | : Roland Diehl |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 577 |
| Release | : 2010-10-02 |
| Genre | : Science |
| ISBN | : 3642126979 |
Download Astronomy with Radioactivities Book in PDF, ePub and Kindle
This book introduces the reader to the field of nuclear astrophysics, i.e. the acquisition and reading of measurements on unstable isotopes in different parts of the universe. The authors explain the role of radioactivities in astrophysics, discuss specific sources of cosmic isotopes and in which special regions they can be observed. More specifically, the authors address stars of different types, stellar explosions which terminate stellar evolutions, and other explosions triggered by mass transfers and instabilities in binary stars. They also address nuclear reactions and transport processes in interstellar space, in the contexts of cosmic rays and of chemical evolution. A special chapter is dedicated to the solar system which even provides material samples. The book also contains a description of key tools which astrophysicists employ in those particular studies and a glossary of key terms in astronomy with radioactivities.
| Author | : B. Bertotti |
| Publisher | : Cambridge University Press |
| Total Pages | : 460 |
| Release | : 1990-10-25 |
| Genre | : Science |
| ISBN | : 9780521372138 |
Download Modern Cosmology in Retrospect Book in PDF, ePub and Kindle
Modern cosmology aims to determine the origin, evolution, and ultimate fate of the Universe. This is an area of modern science that has engendered fierce debates which have captured public interest. This book recounts the development of modern cosmology, in chapters contributed by many of the leading protagonists. It is a fascinating account of physical and observational cosmology, the great cosmological debates, important observations and the riddle of dark matter. The enormous controversy surrounding the Big Bang theory is retold in personal recollections from H. Bondi, W. McCrea, and Fred Hoyle. This is followed by chapters on the discovery of cosmic radio waves and the contributions made by radio astronomers to current cosmology. The book concludes with a tribute to some of the pioneers of cosmology.
| Author | : C.H. Lineweaver |
| Publisher | : Springer |
| Total Pages | : 449 |
| Release | : 2011-09-20 |
| Genre | : Science |
| ISBN | : 9789401065122 |
Download The Cosmic Microwave Background Book in PDF, ePub and Kindle
Proceedings of the NATO Advanced Study Institute on the Cosmological Background Radiation, Strasbourg, France, May 27-June 7, 1996
| Author | : Gabriele Ghisellini |
| Publisher | : Springer |
| Total Pages | : 152 |
| Release | : 2013-06-03 |
| Genre | : Science |
| ISBN | : 3319006126 |
Download Radiative Processes in High Energy Astrophysics Book in PDF, ePub and Kindle
This book grew out of the author’s notes from his course on Radiative Processes in High Energy Astrophysics. The course provides fundamental definitions of radiative processes and serves as a brief introduction to Bremsstrahlung and black body emission, relativistic beaming, synchrotron emission and absorption, Compton scattering, synchrotron self-compton emission, pair creation and emission. The final chapter discusses the observed features of Active Galactic Nuclei and their interpretation based on the radiative processes presented in the book. Written in an informal style, this book will guide students through their first encounter with high-energy astrophysics.
| Author | : Andreas Shalchi |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 210 |
| Release | : 2009-06-04 |
| Genre | : Science |
| ISBN | : 3642003095 |
Download Nonlinear Cosmic Ray Diffusion Theories Book in PDF, ePub and Kindle
If charged particles move through the interplanetary or interstellar medium, they interact with a large-scale magnetic ?eld such as the magnetic ?eld of the Sun or the Galactic magnetic ?eld. As these background ?elds are usually nearly constant in time and space, they can be approximated by a homogeneous ?eld. If there are no additional ?elds, the particle trajectory is a perfect helix along which the par- cle moves at a constant speed. In reality, however, there are turbulent electric and magnetic?elds dueto the interstellaror solar wind plasma. These ?elds lead to sc- tering of the cosmic rays parallel and perpendicular to the background ?eld. These scattering effects, which usually are of diffusive nature, can be described by s- tial diffusion coef?cients or, alternatively, by mean free paths. The knowledge of these parameters is essential for describing cosmic ray propagation as well as d- fusive shock acceleration. The latter process is responsible for the high cosmic ray energies that have been observed. The layout of this book is as follows. In Chap. 1, the general physical scenario is presented. We discuss fundamental processes such as cosmic ray propagation and acceleration in different systems such as the solar system or the interst- lar space. These processes are a consequence of the interaction between charged cosmic particles and an astrophysical plasma (turbulence). The properties of such plasmas are therefore the subject of Chap. 2.
| Author | : Lev Dorman |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 891 |
| Release | : 2013-03-19 |
| Genre | : Science |
| ISBN | : 1402021135 |
Download Cosmic Rays in the Earth’s Atmosphere and Underground Book in PDF, ePub and Kindle
The present monograph as well as the next one (Dorman, M2005) is a result of more than 50 years working in cosmic ray (CR) research. After graduation in December 1950 Moscow Lomonosov State University (Nuclear and Elementary Particle Physics Division, the Team of Theoretical Physics), my supervisor Professor D. I. Blokhintsev planned for me, as a winner of a Red Diploma, to continue my education as an aspirant (a graduate student) to prepare for Ph. D. in his very secret Object in the framework of what was in those time called the Atomic Problem. To my regret the KGB withheld permission, and I, together with other Jewish students who had graduated Nuclear Divisions of Moscow and Leningrad Universities and Institutes, were faced with a real prospect of being without any work. It was our good fortune that at that time there was being brought into being the new Cosmic Ray Project (what at that time was also very secret, but not as secret as the Atomic Problem), and after some time we were directed to work on this Project. It was organized and headed by Prof. S. N. Vernov (President of All-Union Section of Cosmic Rays) and Prof. N. V. Pushkov (Director of IZMIRAN); Prof. E. L. Feinberg headed the theoretical part of the Project.
