Tag: Gamma

Supernovae and Gamma-Ray Bursters


Free Download Supernovae and Gamma-Ray Bursters by Kurt W. Weiler
English | PDF | 2003 | 470 Pages | ISBN : 3540440534 | 10.6 MB
Since the dawn of mankind, observers of the sky have wondered at the sudden appearance of new stars on the seemingly unchanging heavens and, for at least 2000 years, have recorded these phenomena in their annals and archives. Even in more modern times, since the discovery of SN1885A in S Andromeda which ?gured in the important "island universe" discussions of the 1920’s, the puzzle of supernovae (SNe) has played an important role in astrophysics. Only with the seminal work of Fritz Zwicky and Walter Baade in the 1930’s did we begin to understand the di?erences between novae and SNe and the importance of SNe as the fonts of energy for the interstellar medium and as drivers of chemical evolution in galaxies. As recently as the 1940’s and 1950’s the early days of radio astronomy were heavily in?uenced by the familiar names of Cassiopeia A and Taurus A, two young supernova remnants, and two Nobel prizes have been awarded for discovery and study of a related phenomenon, pulsars. In spite of the great age of the study of SNe, since at least the Chinese records of SN185and probably earlier, the ?eld is, in fact, very young having only attracted a large devoted following since the spectacular Type II SN1987A in the Large Magellanic Cloud, the ?rst naked-eye SN in more than 400 years.

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Gamma Rays in the 100 TeV Region from Potential Galactic PeVatron Candidates


Free Download Gamma Rays in the 100 TeV Region from Potential Galactic PeVatron Candidates: Observation with the Tibet Air Shower Array and the Muon Detector Array by Sei Kato
English | PDF EPUB (True) | 2024 | 180 Pages | ISBN : 981971642X | 50.6 MB
This book presents two candidates for astrophysical accelerators of cosmic rays with petaelectron-volt (PeV) energies in our Galaxy, the so-called PeVatrons, through the observation of sub-PeV gamma rays performed by the Tibet air shower array. The two gamma-ray sources are TASG J1844-038-a newly detected source in this presented work-and HESS J1849-000. Reconstructing their gamma-ray energy spectra up to the sub-PeV range and also analyzing the archive data published by a radio survey, the book discusses in depth the emission mechanisms of the observed gamma rays and suggests that these two gamma-ray sources are candidates for PeVatrons. The results give insights into the population of PeVatron in the Galaxy, which is important to consider their contribution to the PeV cosmic rays observed at the Earth.

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Gamma Ray Imaging Technology and Applications


Free Download Gamma Ray Imaging: Technology and Applications by Junwei Du, Krzysztof (Kris) Iniewski
English | PDF EPUB (True) | 2023 | 248 Pages | ISBN : 3031306651 | 41.7 MB
This book will provide readers with a good overview of some of the most recent advances in the field of detector technology for gamma-ray imaging, especially as it pertains to new applications. There will be a good mixture of general chapters in both technology and applications in medical imaging and industrial testing. The book will have an in-depth review of the research topics from world-leading specialists in the field. The conversion of the gamma-ray signal into analog/digital value will be covered in some chapters. Some would also provide a review of CMOS chips for gamma-ray image sensors.

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