Observations of high energy gamma-rays from winter thunderclouds
نویسندگان
چکیده
T. Enoto, H. Tsuchiya, T. Yuasa, S. Yamada, H. Kato, M. Kawaharada, T. Kitaguchi, M. Kokubun, M. Okano, S. Nakamura, K. Nakazawa and K. Makishima Department of Physics, University of Tokyo, Tokyo 113-0033, Japan Cosmic Radiation Laboratory, Riken, Saitama 351-0198, Japan Department of High Energy Astrophysics, Institute of Space and Astronautical Science, JAXA, Kanagawa 229-8501, Japan Department of Physics, Tokyo University of Science, Tokyo 162-8601, Japan
منابع مشابه
Detection of high-energy gamma rays from winter thunderclouds.
A report is made on a comprehensive observation of a burstlike gamma-ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 6 January 2007. The detected emission, lasting for approximately 40 sec, preceded cloud-to-ground lightning discharges. The burst spectrum, extending to 10 MeV, can be interpreted as consisting of bremsstrahlung photons originating from relativ...
متن کاملEstimation of the fluence of high‐energy electron bursts produced by thunderclouds and the resulting radiation doses received in aircraft
[1] Using recent X‐ray and gamma‐ray observations of terrestrial gamma‐ray flashes (TGFs) from spacecraft and of natural and rocket‐triggered lightning from the ground, along with detailed models of energetic particle transport, we calculate the fluence (integrated flux) of high‐energy (million electronvolt) electrons, X rays, and gamma rays likely to be produced inside or near thunderclouds in...
متن کاملHigh-Energy Atmospheric Physics: Terrestrial Gamma-Ray Flashes and Related Phenomena
It is now well established that both thunderclouds and lightning routinely emit x-rays and gamma-rays. These emissions appear over wide timescales, ranging from submicrosecond bursts of x-rays associated with lightning leaders, to sub-millisecond bursts of gamma-rays seen in space called terrestrial gamma-ray flashes, to minute long glows from thunderclouds seen on the ground and in or near the...
متن کاملProperties of the thundercloud discharges responsible for terrestrial gammaray flashes
[1] The source of terrestrial gamma-ray flashes (TGFs) has been an active area of research since their discovery by Compton Gamma-Ray Observatory/Burst and Transient Source Experiment in 1994. These intense bursts of gamma rays originate within thunderclouds via the rapid production of relativistic runaway electrons, accelerated by thundercloud/lightning electric fields to multi-MeV energies. R...
متن کاملHIGH LATITUDE GAMMA RAYS ASSOCIATED WITH VIRGO
A more detailed analysis is made of the energy spectrum of the diffuse component of extragalactic gamma rays over the range of 0.3- 10 GeV, obtained fromthe EGRET instrument at the Compton Gamma Ray Observatory. The derived excess energy spectrum of high galactic latitude, b > 60°, using intercept method shows that it is correlated with Virgo cluster (over lsr) and average Virgo intensity i...
متن کامل