Studying the time histogram of a terrestrial electron beam detected from the opposite hemisphere of its associated TGF
| Autor: | Michael S. Briggs, F. Forme, P.-L. Blelly, David Sarria |
|---|---|
| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
electron
Physics pitch angle 010504 meteorology & atmospheric sciences business.industry Astrophysics::High Energy Astrophysical Phenomena Electron TEB 01 natural sciences TGF Geophysics Optics Positron [SDU]Sciences of the Universe [physics] Space and Planetary Science Histogram 0103 physical sciences Cathode ray positron Astrophysics::Earth and Planetary Astrophysics Pitch angle Atomic physics business 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geophysical Research: Space Physics Journal of Geophysical Research: Space Physics, 2016, 121, pp.4698-4704. ⟨10.1002/2015JA021881⟩ |
| ISSN: | 2169-9402 2169-9380 |
| DOI: | 10.1002/2015ja021881 |
| Popis: | International audience; Terrestrial gamma-ray flashes are bursts of X/gamma photons, correlated to thunderstorms. By interacting with the atmosphere, the photons produce a substantial number of electrons and positrons. Some of these reach a sufficiently high altitude that their interactions with the atmosphere become negligible, and they are then guided by geomagnetic field lines, forming a Terrestrial Electron Beam. On 9 December 2009, the Gamma-Ray Burst Monitor (GBM) instrument on board the Fermi Space Telescope made a particularly interesting measurement of such an event. To study this type of event in detail, we perform Monte-Carlo simulations and focus on the resulting time histograms. In agreement with previous work, we show that the histogram measured by Fermi GBM is reproducible from a simulation. We then show that the time histogram resulting from this simulation is only weakly dependent on the production altitude, duration, beaming angle, and spectral shape of the associated terrestrial gamma-ray flash. Finally, we show that the time histogram can be decomposed into three populations of leptons, coming from the opposite hemisphere, and mirroring back to the satellite with or without interacting with the atmosphere, and that these populations can be clearly distinguished by their pitch angles. |
| Databáze: | OpenAIRE |
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