Download or read book X ray Outbursts from Nearby normal and Active Galaxies written by Stefanie Komossa and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X rays Outbursts from Nearby normal and Active Galaxies written by Stefanie Komossa and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Clusters of Galaxies written by John David McKee and published by . This book was released on 1983 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deep Fields written by S. Cristiani and published by Springer Science & Business Media. This book was released on 2001-12 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a synopsis of modern deep-field astronomy, based on the powerful telescopes and instruments developed in recent years. It is organized along topical themes, such as the extragalactic background radiation at different wavelengths, the evolution of galaxies, the history of star formation, the nature of absorbers, the reionization of the intergalactic medium, the validity of photometric redshifts, gravitational lensing, and clustering of galaxies. Stellar and substellar objects were not neglected, however, and one session was devoted to nearby bodies such as trans-Neptunian solar system objects, brown dwarfs, and stars with special characteristics.
Download or read book X Ray Emission from Clusters of Galaxies written by Craig L. Sarazin and published by Cambridge University Press. This book was released on 1988-03-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1988, this book is a comprehensive survey of the astrophysical characteristics of the hot gas which pervades clusters of galaxies. In our universe, clusters of galaxies are the largest organised structures. Typically they comprise hundreds of galaxies moving through a region of space ten million light years in diameter. The volume between the galaxies is filled with gas having a temperature of 100 million degrees. This material is a strong source of cosmic X-rays. Dr Sarazin describes the theoretical description of the origin, dynamics, and physical state of the cluster gas. Observations by radio and optical telescopes are also summarised. This account is addressed to professional astronomers and to graduate students. It is an exhaustive summary of a rapidly expanding field of research in modern astrophysics.
Download or read book The X ray Background written by Xavier Barcons and published by Cambridge University Press. This book was released on 1992-07-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the current observational knowledge and understanding of the cosmic X-ray background.
Download or read book Toward an Understanding of the Progenitors of Gamma Ray Bursts written by Joshua S. Bloom and published by Universal-Publishers. This book was released on 2002 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The various possibilities for the origin ("progenitors") of gamma-ray bursts (GRBs) manifest in differing observable properties. Through deep spectroscopic and high-resolution imaging observations of some GRB hosts, I demonstrate that well-localized long-duration GRBs are connected with otherwise normal star-forming galaxies at moderate redshifts of order unity. Using high-mass binary stellar population synthesis models, I quantify the expected spatial extent around galaxies of coalescing neutron stars, one of the leading contenders for GRB progenitors. I then test this scenario by examining the offset distribution of GRBs about their apparent hosts making extensive use of ground-based optical data from Keck and Palomar and space-based imaging from the Hubble Space Telescope. The offset distribution appears to be inconsistent with the coalescing neutron star binary hypothesis (and, similarly, black-hole--neutron star coalescences); instead, the distribution is statistically consistent with a population of progenitors that closely traces the ultra-violet light of galaxies. This is naturally explained by bursts which originate from the collapse of massive stars ``collapsars''). This claim is further supported by the unambiguous detections of intermediate-time (approximately three weeks after the bursts) emission ``bumps'' which appear substantially more red than the afterglows themselves. I claim that these bumps could originate from supernovae that occur at approximately the same time as the associated GRB; if true, GRB 980326 and GRB 011121 provide strong observational evidence connecting cosmological GRBs to high-redshift supernovae and implicate massive stars as the progenitors of at least some long-duration GRBs.
Download or read book Black Holes in Binaries and Galactic Nuclei Diagnostics Demography and Formation written by Riccardo Giacconi and published by Springer Science & Business Media. This book was released on 2001-02-26 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The observational evidence for the existence of black holes has grown significantly over recent decades. Stellar-mass black holes are detected as X-ray sources in binary systems, while supermassive black holes, with masses more than a million times the mass of the Sun, lurk in the nuclei of galaxies. These proceedings provide a useful and up-to-date overview of the observations of black holes in binaries, in the center of the Milky Way, and in the nuclei of galaxies, presented by leading expert astronomers. Special attention is given to the formation (including the recent evidence from gamma-ray bursts), physical properties, and demographics of black holes.
Download or read book Lighthouses of the Universe The Most Luminous Celestial Objects and Their Use for Cosmology written by Marat Gilfanov and published by Springer Science & Business Media. This book was released on 2002-08-06 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews the present status of understanding the nature of the most luminous objects in the Universe, connected with supermassive black holes and supermassive stars, clusters of galaxies and ultraluminous galaxies, sources of gamma-ray bursts and relativistic jets. Leading experts give overviews of essential physical mechanisms involved, discuss formation and evolution of these objects as well as prospects for their use in cosmology, as probes of the intergalactic medium at high redshifts and as a tool to study the end of dark ages. The theoretical models are complemented by new exciting results from orbital and ground-based observatories such as Chandra, XMM-Newton, HST, SDSS, VLT, Keck, and many others.
Download or read book Exploring the X ray Universe written by Frederick D. Seward and published by Cambridge University Press. This book was released on 2010-08-26 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capturing the excitement and accomplishments of X-ray astronomy, this second edition now includes a broader range of astronomical phenomena and dramatic new results from the most powerful X-ray telescopes. Covering all areas of astronomical research, ranging from the smallest to the largest objects, from neutron stars to clusters of galaxies, this textbook is ideal for undergraduate students. Each chapter starts with the basic aspects of the topic, explores the history of discoveries, and examines in detail modern observations and their significance. This new edition has been updated with results from the most recent space-based instruments, including ROSAT, BeppoSAX, ASCA, Chandra, and XMM. New chapters cover X-ray emission processes, the interstellar medium, the Solar System, and gamma-ray bursts. The text is supported by over 300 figures, with tables listing the properties of the sources, and more specialized technical points separated in boxes.
Download or read book X ray Emission and Absorption in Active Galaxies written by Christopher Stephen Reynolds and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Big Bang Active Galactic Nuclei and Supernovae Paper written by S. Hayakawa and published by . This book was released on 1989 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Cambridge Photographic Atlas of Galaxies written by Michael König and published by Cambridge University Press. This book was released on 2017-09-07 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galaxies - the Milky Way's siblings - offer a surprising variety of forms and colours. Displaying symmetrical spiral arms, glowing red nebulae or diffuse halos, even the image of a galaxy can reveal much about its construction. All galaxies consist of gas, dust and stars, but the effects of gravity, dark matter and the interaction of star formation and stellar explosions all influence their appearances. This volume showcases more than 250 of the most beautiful galaxies within an amateur's reach and uses them to explain current astrophysical research. It features fantastic photographs, unique insights into our knowledge, tips on astrophotography and essential facts and figures based on the latest science. From the Andromeda Galaxy to galaxy clusters and gravitational lenses, the nature of galaxies is revealed through these stunning amateur photographs. This well illustrated reference atlas deserves a place on the bookshelves of astronomical imagers, observers and armchair enthusiasts.
Download or read book Das gerettete Recht der Churs chsischen Sage written by and published by . This book was released on 1757 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Observations of Active Galaxies written by A. Lawrence and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transient Radiation Emission from Astrophysical Jets written by Yuen-Lam Wong and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Transient Radiation Emission From Astrophysical Jets" by Yuen-lam, Wong, 黃菀林, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled TRANSIENT RADIATION EMISSION FROM ASTROPHYSICAL JETS submitted by Wong Yuen Lam for the Degree of Master of Philosophy at The University of Hong Kong in September 2007 Jet emission is a common phenomenon in astronomy. This thesis gives a brief review on the previous studies and a report of a detailed numerical study on the application of a jet emission model on two kinds of transient astronomical events: the gamma-ray burst afterglows and the huge X-ray variations at the galactic nuclei of the non-active galaxies. It is commonly believed that jet emission is involved in gamma-ray bursts and their afterglows. This study works further on this model to stress the im- portance on the equal arrival time surface consideration in the GRB afterglow light curve calculations and also shows that some of the changes in model pa- rameters (i.e. electron energy fraction and the magnetic energy fraction of theshocked fluid) are able to produce sharp rebrighenings on the R-band afterglow light curves as required in many observations. This rebrightening model can be further tested by broadband studies. If the rebrightenings are induced by changes in these physical parameters, this study will have great implications on the studies on gamma-ray burst afterglows and shock accelerations. It is also found that jet emission may play an important role in explaining the huge X-ray variations occurring at the optically inactive galactic nuclei, which are generally interpreted as the radiation given out when a star is tidally disrupted by and part of the star is accreted to the galactic black hole. The rise in X-ray is classically explained to be related to the radiation from the accretiondisk, butitisfoundthatthejetemissionmodelalsogivesasatisfactory explanation to the observations of the late emission. The jet emission model predicts that sources of huge X-ray variations will also reveal themselves in the future gamma-ray mission GLAST. DOI: 10.5353/th_b3937851 Subjects: Afterglow (Physics) Gamma ray bursts X-ray astronomy Galactic nuclei Astrophysical jets
Download or read book Compact Stellar X ray Sources written by Walter Lewin and published by Cambridge University Press. This book was released on 2006-04-06 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray astronomy is the prime available window on astrophysical compact objects: black holes, neutron stars and white dwarfs. In this book, prominent experts provide a comprehensive overview of the observations and astrophysics of these objects. This is a valuable reference for graduate students and active researchers.
