Search for Patterns by Combining Cosmic-ray Energy and Arrival Directions at the Pierre Auger Observatory 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 Search for Patterns by Combining Cosmic-ray Energy and Arrival Directions at the Pierre Auger Observatory PDF full book. Access full book title Search for Patterns by Combining Cosmic-ray Energy and Arrival Directions at the Pierre Auger Observatory by . Download full books in PDF and EPUB format.
Author: Publisher: ISBN: Category : Languages : en Pages : 15
Book Description
Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with $E \ge 6 \times 10^$ eV by analyzing cosmic rays with energies above $E \ge 5 \times 10^$ eV arriving within an angular separation of approximately 15$^{\circ }$ . We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.
Author: Publisher: ISBN: Category : Languages : en Pages : 15
Book Description
Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with $E \ge 6 \times 10^$ eV by analyzing cosmic rays with energies above $E \ge 5 \times 10^$ eV arriving within an angular separation of approximately 15$^{\circ }$ . We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.
Author: Veronica Bindi Publisher: CRC Press ISBN: 1000850838 Category : Science Languages : en Pages : 325
Book Description
Key features: Complete introductory overview of cosmic ray physics Covers the origins, acceleration, transport mechanisms and detection of these particles Mathematical and technical detail is kept separate from the main text
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above 6 [1] 1019 eV and the positions of active galactic nuclei (AGN) lying within 75 Mpc. We reject the hypothesis of an isotropic distribution of these cosmic rays at over 99% confidence level from a prescribed a priori test. The correlation we observe is compatible with the hypothesis that the highest energy particles originate from relatively nearby extragalactic sources whose fluxes have therefore not been significantly reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.
Author: Tulio Pinho Navarro Publisher: Springer Nature ISBN: 3030569543 Category : Medical Languages : en Pages : 425
Book Description
Vascular diseases are the leading cause of death worldwide. Distinguished clinical and surgical approaches have attempted to overcome its morbidity and mortality; still 17.9 million people die every year due to vascular affections. Stem cell therapy has emerged as a promising therapeutic strategy. Stem cells synthesize and secrete cytokines that promote cell recruitment, immunomodulation, extracellular matrix remodeling, angiogenesis, and neuroregeneration, all of which promote regeneration. Besides that, stem cells are also capable of differentiating in various cell types, being employed in tissue engineering. Preclinical and clinical investigations have reported efficacy of stem cell therapy for various vascular diseases. Even though results are encouraging, the studies demonstrate variation in stem cell type and origin, route and protocol for administration, and concomitant use of other treatment strategies, impairing easy interpretation of results and clinical application. The purpose of this book is to compile and comprise the current state of the evidence regarding stem cell therapy for each vascular disease, elucidating possible clinical applications. More than an objective guide for readers on the use of this novel treatment strategy, this publication will advocate for stem cell therapy use and development and will be of significant interest to physicians in a wide range of disciplines as well as researchers.
Author: Pierre Sokolsky Publisher: World Scientific ISBN: 1800612621 Category : Science Languages : en Pages : 323
Book Description
The universe is pervaded by particles with extreme energies, millions of times greater than we can produce on Earth. They have been a mystery for over a century. Now, current and future experiments in particle astrophysics are leading us to answers to the most fundamental questions about them. How does nature accelerate the highest energy particles in the universe? Do new interactions between them occur at such extreme energies? Are there unknown aspects of spacetime that can be uncovered by studying these particles?This book brings together three fields within 'extreme astronomy': ultra-high-energy cosmic ray physics, neutrino astronomy, and gamma-ray astronomy, and discusses how each can help answer these questions. Each field is presented with a theoretical introduction that clearly elucidates the key questions scientists face. This is followed by chapters that discuss the current set of experiments — how they work and their discoveries. Finally, new techniques and approaches are discussed to solve the mysteries uncovered by the current experiments.
Author: Claus Grupen Publisher: Springer Science & Business Media ISBN: 3642132715 Category : Science Languages : en Pages : 1251
Book Description
The handbook centers on detection techniques in the field of particle physics, medical imaging and related subjects. It is structured into three parts. The first one is dealing with basic ideas of particle detectors, followed by applications of these devices in high energy physics and other fields. In the last part the large field of medical imaging using similar detection techniques is described. The different chapters of the book are written by world experts in their field. Clear instructions on the detection techniques and principles in terms of relevant operation parameters for scientists and graduate students are given.Detailed tables and diagrams will make this a very useful handbook for the application of these techniques in many different fields like physics, medicine, biology and other areas of natural science.
Author: Dong Yu Publisher: Springer ISBN: 1447157796 Category : Technology & Engineering Languages : en Pages : 329
Book Description
This book provides a comprehensive overview of the recent advancement in the field of automatic speech recognition with a focus on deep learning models including deep neural networks and many of their variants. This is the first automatic speech recognition book dedicated to the deep learning approach. In addition to the rigorous mathematical treatment of the subject, the book also presents insights and theoretical foundation of a series of highly successful deep learning models.
Author: Todor Stanev Publisher: Springer Science & Business Media ISBN: 3540851488 Category : Science Languages : en Pages : 334
Book Description
Offers an accessible text and reference (a cosmic-ray manual) for graduate students entering the field and high-energy astrophysicists will find this an accessible cosmic-ray manual Easy to read for the general astronomer, the first part describes the standard model of cosmic rays based on our understanding of modern particle physics. Presents the acceleration scenario in some detail in supernovae explosions as well as in the passage of cosmic rays through the Galaxy. Compares experimental data in the atmosphere as well as underground are compared with theoretical models
Author: 
Author: 
Author: Veronica Bindi
Author: 
Author: Tulio Pinho Navarro
Author: Pierre Sokolsky
Author: Claus Grupen
Author: Lukas Zehrer
Author: L. W. Howell
Author: Dong Yu
Author: Todor Stanev