Download or read book A Search for Anisotropy in the Cosmo Microwave Background on Angular Scales of 1 to 30 Arcminutes written by Steven T. Myers and published by . This book was released on 1990 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anisotropy Measurements of the Cosmic Background Radiation at 3 Mm Wavelength and an Angular Scale of 30 Arcminutes written by Peter Russell Meinhold and published by . This book was released on 1990 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Measurements of Anisotropy in the Cosmic Microwave Background on Degree Angular Scales written by Mark Joseph Devlin and published by . This book was released on 1993 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for Small Angular Scale Anisotropy in Cosmic Background Radiation at 90 GHz from the South Pole written by Hiên Trọng Nguyên and published by . This book was released on 1993 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for Anisotropy in the Cosmic Background Radiation at Millimeter Wavelengths on Angular Scales from 0 3 to 3 Degrees written by Marc Laurenz Fischer and published by . This book was released on 1991 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Physics and Cosmology Dark Matter written by M. Srednicki and published by Elsevier. This book was released on 2012-12-02 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: At least eighty percent of the mass of the universe consists of some material which, unlike ordinary matter, neither emits nor absorbs light. This book collects key papers related to the discovery of this astonishing fact and its profound implications for astrophysics, cosmology, and the physics of elementary particles. The book focuses on the likely possibility that the dark matter is composed of an as yet undiscovered elementary particle, and examines the boundaries of our present knowledge of the properties such a particle must possess.
Download or read book Inflationary Cosmology written by L. F. Abbott and published by World Scientific. This book was released on 1986 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inflation has revolutionized cosmology primarily because it has eliminated the dependence of cosmological modelling on initial conditions. Thus inflationary cosmology is able to account for the present universe starting from a wide range of initial conditions. This volume reviews the presents state of subject. Each chapter consists of a brief introduction followed by reprints of important papers. Experts in the field are also provided with a unifying view point.
Download or read book Measurement of Anisotropy in the Cosmic Background Radiation on a Large Angular Scale at 33 GHz written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a measurement of anisotropy in the 3 °K cosmic background radiation on a large-angular-scale are presented. Observations were carried out with a dual-antenna microwave radiometer operating at 33 GHz (0.89 cm wavelength) flown on board a U-2 aircraft to 20-km altitude. In eleven flights, between December 1976 and May 1978, the radiometer measured differential intensity between pairs of directions distributed over most of the northern celestial hemisphere with an rms sensitivity of +- 46m°K/.sqrt. Hz. The measurements show clear evidence of anisotropy that is readily interpreted as due to the motion of the earth relative to the sources of the radiation; the anisotropy is well fit by a cosine distribution of amplitude 3.61 +- 0.54 millireverse arrowreverse arrow-degrees Kelvin (m°K), one part in 800 of 3°K, implying a velocity of 361 +- 54 km/sec toward the direction 11.23 +- 0.46 hours right ascension, and 19.0 +- 7.5° declination. A simultaneous fit to a combined hypothesis of dipole (cos theta) and quadrupole (cos2 theta) angular distributions places a 1 m°K limit on the amplitude of most components of quadruple anisotropy with 90% confidence. Additional analysis places a 0.5 m °K limit on uncorrelated fluctuations (sky-roughness) in the 3°K background on an angular scale of the antenna beam width, about 7°. This thesis describes the equipment development through three engineering flights and the data acquisition in eleven additional flights. The astrophysical results are then presented from the statistical analysis of the reduced data.
Download or read book The Early Universe and the Cosmic Microwave Background Theory and Observations written by Norma G. Sànchez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the Daniel Chalonge School on Astrofundamental Physics is to contribute to a theory of the universe (and particularly of the early universe) up to the marks, and at the scientific height of, the unprecedented accuracy, existent and expected, in the observational data. The impressive development of modern cosmology during the last decades is to a large extent due to its unification with elementary particle physics and quantum field theory. The cross-section between these fields has been increasing setting up Astrofundamental Physics. The early universe is an exceptional (theoretical and experimental) laboratory in this new discipline. This NATO Advanced Study Institute provided an up dated understanding, from a fundamental physics and deep point of view, of the progress and key issues in the early universe and the cosmic microwave background: theory and observations. The genuine interplay with large scale structure formation and dark matter problem were discussed. The central focus was placed on the cosmic microwave background. Emphasis was given to the precise inter-relation between fundamental physics and cosmology in these problems, both at the theoretical and experimental/observational levels, within a deep and well defined programme which provided in addition, a careful interdisciplinarity. Special sessions were devoted to high energy cosmic rays, neutrinos in astrophysics, and high energy astrophysics. Deep understanding, clarification, synthesis, careful interdisciplinarity within a fundamental physics framework, were the main goals of the course.
Download or read book A Measurement of Anisotropy in the Cosmic Background Radiation on a Large Angular Scale at 33 GHz written by Marc Victor Gorenstein and published by . This book was released on 1978 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Primer on the Physics of the Cosmic Microwave Background written by Massimo Giovannini and published by World Scientific. This book was released on 2008 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last fifteen years, various areas of high energy physics, astrophysics and theoretical physics have converged on the study of cosmology so that any graduate student in these disciplines today needs a reasonably self-contained introduction to the Cosmic Microwave Background (CMB). This book presents the essential theoretical tools necessary to acquire a modern working knowledge of CMB physics. The style of the book, falling somewhere between a monograph and a set of lecture notes, is pedagogical and the author uses the typical approach of theoretical physics to explain the main problems in detail, touching on the main assumptions and derivations of a fascinating subject. Sample Chapter(s). Chapter 1: Why CMB Physics? (297 KB). Contents: Why CMB Physics?; From CMB to the Standard Cosmological Model; Problems with the SCM; SCM and Beyond; Essentials of Inflationary Dynamics; Inhomogeneities in FRW Models; The First Lap in CMB Anisotropies; Improved Fluid Description of Pre-Decoupling Physics; Kinetic Hierarchies; Early Initial Conditions?; Surfing on the Gauges; Interacting Fluids; Spectator Fields; Appendices: The Concept of Distance in Cosmology; Kinetic Description of Hot Plasmas; Scalar Modes of the Geometry; Metric Fluctuations: Gauge Independent Treatment. Readership: PhD students and researchers in physics, astrophysics and astronomy.
Download or read book The Physics of the Cosmic Microwave Background written by Pavel D. Naselsky and published by Cambridge University Press. This book was released on 2006-08-17 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectacular observational breakthroughs, particularly by the WMAP satellite, have led to a new epoch of CMB science long after its original discovery. Taking a physical approach, the authors of this volume probe the problem of the 'darkness' of the Universe: the origin and evolution of dark energy and matter in the cosmos. Starting with the observational background of modern cosmology, they provide an accessible review of this fascinating yet complex subject. Topics discussed include the kinetics of the electromagnetic radiation in the Universe, the ionization history of cosmic plamas, the origin of primordial perturbations in light of the inflation paradigm, and the formation of anisotropy and polarization of the CMB. This fascinating review will be valuable to advanced students and researchers in cosmology.
Download or read book Current Topics in Astrofundamental Physics The Cosmic Microwave Background written by Norma Sanchez and published by Springer Science & Business Media. This book was released on 2001-03-31 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute, Erice, Ettore Majorana Centre, Italy, 5-16 December 1999
Download or read book Large Angular Scale Anisotropy in the Cosmic BackgroundRadiation written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the results of an extended series of airborne measurements of large-angular-scale anisotropy in the 3 K cosmic background radiation. Observations were carried out with a dual-antenna microwave radiometer operating at 33 GHz (0.89 cm wavelength) flown on board a U-2 aircraft to 20 km altitude. In eleven flights, between December 1976 and May 1978, the radiometer measured differential intensity between pairs of directions distributed over most of the northern hemisphere with an rms sensitivity of 47 mK Hz−12. The measurements show clear evidence of anisotropy that is readily interpreted as due to the solar motion relative to the sources of the radiation. The anisotropy is well fit by a first order spherical harmonic of amplitude 360 ± 50km sec−1 toward the direction 11.2 ± 0.5 hours of right ascension and 19 ± 8 degrees declination. A simultaneous fit to a combined hypothesis of dipole and quadrupole angular distributions places a 1 mK limit on the amplitude of most components of quadrupole anisotropy with 90% confidence. Additional analysis places a 0.5 mK limit on uncorrelated fluctuations (sky-roughness) in the 3 K background on an angular scale of the antenna beam width, about 7 degrees.
Download or read book Statistical Analysis of Cosmic Microwave Background Anisotropy written by Emory Freeman Bunn and published by . This book was released on 1995 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Anisotropies in the Cosmic Microwave Background on an Angular Scale of Eight Degrees written by Robert Anthony Watson and published by . This book was released on 1986 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
