https://doi.org/10.1051/epjconf/201714506001
New stage in high-energy gamma-ray studies with GAMMA-400 after Fermi-LAT
1 Lebedev Physical Institute, 119991 Moscow, Russia
2 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow 115409, Russia
3 Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, 34149 Trieste, Italy
4 Istituto Nazionale di Fisica Nucleare, Sezione di Florence, 50019 Sesto Fiorentino, Florence, Italy
5 Scientific Research Institute for System Analysis, 117218 Moscow, Russia
6 Taras Shevchenko National University, Kyiv 01601, UKraine
7 Lviv Center of Institute of Space Research, Lviv 79060, UKraine
8 NASA Goddard Space Flight Center and CRESST/University of Maryland, Greenbelt, Maryland 20771, USA
9 Hansen Experimental Physics Laboratory and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA
10 Istituto Nazionale di Fisica Nucleare, Sezione di Rome “Tor Vergata”, 00133 Rome, Italy
11 Istituto Nazionale di Astrofisica IASF and Physics Department of University of Rome Tor Vergata, 00133 Roma, Italy
a e-mail: tnp51@yandex.ru
Published online: 26 June 2017
Fermi-LAT has made a significant contribution to the study of high-energy gamma-ray diffuse emission and the observations of 3000 discrete sources. However, one third of all gamma-ray sources (both galactic and extragalactic) are unidentified, the data on the diffuse gamma-ray emission should be clarified, and signatures of dark matter particles in the high-energy gamma-ray range are not observed up to now. GAMMA-400, the currently developing gamma-ray telescope, will have angular (∼0.01∘ at 100 GeV) and energy (∼1% at 100 GeV) resolutions in the energy range of 10–1000 GeV which are better than Fermi-LAT (as well as ground gamma-ray telescopes) by a factor of 5–10. It will observe some regions of the Universe (such as the Galactic Center, Fermi Bubbles, Crab, Cygnus, etc.) in a highly elliptic orbit (without shading the telescope by the Earth) continuously for a long time. It will allow us to identify many discrete sources, to clarify the structure of extended sources, to specify the data on the diffuse emission, and to resolve gamma rays from dark matter particles.
© The Authors, published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
