Propagation Of Ultrahigh Energy Cosmic Rays In The Galaxy And Search For Their Sources
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Propagation Of Ultrahigh Energy Cosmic Rays In The Galaxy And Search For Their Sources
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Author : Gwenael Giacinti
language : en
Publisher:
Release Date : 2011
Propagation Of Ultrahigh Energy Cosmic Rays In The Galaxy And Search For Their Sources written by Gwenael Giacinti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Clustering Properties Of Ultrahigh Energy Cosmic Rays And The Search For Their Astrophysical Sources
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Author :
language : en
Publisher:
Release Date : 2007
Clustering Properties Of Ultrahigh Energy Cosmic Rays And The Search For Their Astrophysical Sources written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The arrival directions of ultrahigh energy cosmic rays (UHECRs) may show anisotropies on all scales, from just above the experimental angular resolution up to medium scales and dipole anisotropies. We find that a global comparison of the two-point auto-correlation function of the data with the one of catalogues of potential sources is a powerful diagnostic tool. In particular, this method is far less sensitive to unknown deflections in magnetic fields than cross-correlation studies while keeping a strong discrimination power among source candidates. We illustrate these advantages by considering ordinary galaxies, gamma ray bursts and active galactic nuclei as possible sources. Already the sparse publicly available data suggest that the sources of UHECRs may be a strongly clustered sub-sample of galaxies or of active galactic nuclei. We present forecasts for various cases of source distributions which can be checked soon by the Pierre Auger Observatory.
The Intergalactic Propagation Of Ultrahigh Energy Cosmic Ray Nuclei
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Author :
language : en
Publisher:
Release Date : 2006
The Intergalactic Propagation Of Ultrahigh Energy Cosmic Ray Nuclei written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
We investigate the propagation of ultra-high energy cosmic ray nuclei (A = 1-56) from cosmologically distant sources through the cosmic radiation backgrounds. Various models for the injected composition and spectrum and of the cosmic infrared background are studied using updated photodisintegration cross-sections. The observational data on the spectrum and the composition of ultra-high energy cosmic rays are jointly consistent with a model where all of the injected primary cosmic rays are iron nuclei (or a mixture of heavy and light nuclei).
On The Possible Association Of Ultra High Energy Cosmic Rays With Nearby Active Galaxies
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Author :
language : en
Publisher:
Release Date : 2008
On The Possible Association Of Ultra High Energy Cosmic Rays With Nearby Active Galaxies written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of cosmic rays (CRs) with energies>57 EeV that suggests a correlation with the positions of active galactic nuclei (AGN) located within H"5 Mpc. However, this analysis does not take into account AGN morphology. A detailed study of the sample of AGN whose positions correlate with the CR events shows that most of them are classified as Seyfert 2 and low-ionization nuclear emission-line region (LINER) galaxies which do not differ from other local AGN of the same types. Therefore, the claimed correlation between the CR events observed by the Pierre Auger Observatory and local active galaxies should be considered as resulting from a chance coincidence, if the production of the highest energy CRs is not episodic in nature, but operates in a single object on long (e"Myr) timescales. Additionally, most of the selected sources do not show significant jet activity, and hence--in the framework of the jet paradigm--there are no reasons for expecting them to accelerate CRs up to the highest energies, H"02° eV, at all. If the extragalactic magnetic fields and the sources of these CRs are coupled with matter, it is possible that the deflection angle is larger than expected in the case of a uniform source distribution due to effectively larger fields. A future analysis has to take into account AGN morphology and may yield a correlation with a larger deflection angle and/or more distant sources. We further argue that Cen A alone could be associated with at least 4 events due to its large radio extent, and Cen B can be associated with more than 1 event due to its proximity to the Galactic plane and, correspondingly, the stronger Galactic magnetic field the ultra high energy CRs (UHECRs) encounter during propagation. If the UHECRs associated with these events are indeed accelerated by Cen A and Cen B, their deflection angles may provide information on the structure of the magnetic field in the direction of these putative sources. Future -ray observations (by, e.g., Gamma-Ray Large Area Space Telescope [GLAST], High Energy Stereoscopic System [HESS]) may provide additional clues to the nature of the accelerators of the UHECRs in the local Universe.
Genesis And Propagation Of Cosmic Rays
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Author : M.M. Shapiro
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Genesis And Propagation Of Cosmic Rays written by M.M. Shapiro and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Proceedings of the NATO Advanced Study Institute, Erice, Sicily, Italy, June 1-9, 1986
Astrophysical Sources Of Cosmic Rays And Related Measurements With The Pierre Auger Observatory
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Author :
language : en
Publisher:
Release Date : 2009
Astrophysical Sources Of Cosmic Rays And Related Measurements With The Pierre Auger Observatory written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
These are presentations to be presented at the 31st International Cosmic Ray Conference, in Lodz, Poland during July 2009. It consists of the following presentations: (1) Correlation of the highest energy cosmic rays with nearby extragalactic objects in Pierre Auger Observatory data; (2) Discriminating potential astrophysical sources of the highest energy cosmic rays with the Pierre Auger Observatory; (3) Intrinsic anisotropy of the UHECR from the Pierre Auger Observatory; (4) Ultra-high energy photon studies with the Pierre Auger Observatory; (5) Limits on the flux of diffuse ultra high energy neutrinos set using the Pierre Auger Observatory; (6) Search for sidereal modulation of the arrival directions of events recorded at the Pierre Auger Observatory; (7) Cosmic Ray Solar Modulation Studies in the Pierre Auger Observatory; (8) Investigation of the Displacement Angle of the Highest Energy Cosmic Rays Caused by the Galactic Magnetic Field; (9) Search for coincidences with astrophysical transients in Pierre Auger Observatory data; and (10) An alternative method for determining the energy of hybrid events at the Pierre Auger Observatory.
Conference Papers
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Author :
language : en
Publisher:
Release Date : 1987
Conference Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Cosmic rays categories.
Papers for each conference issued in several volumes. Volumes distributed to conference registrants have title "Conference papers"; other volumes of papers published after the conference are identified as "Late papers", "Invited papers", or other similar titles. Most conferences also have a general index volume.
High Energy Cosmic Rays
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Author : Todor Stanev
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
High Energy Cosmic Rays written by Todor Stanev and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Science categories.
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
Propagation Of Ultra High Energy Cosmic Rays And Their Secondaries With Crpropa
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Author : Arjen René van Vliet
language : en
Publisher:
Release Date : 2015
Propagation Of Ultra High Energy Cosmic Rays And Their Secondaries With Crpropa written by Arjen René van Vliet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The Propagation Of Ultra High Energy Cosmic Rays
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Author : Andrew Martin Taylor
language : en
Publisher:
Release Date : 2006
The Propagation Of Ultra High Energy Cosmic Rays written by Andrew Martin Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Cosmic rays categories.