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Title: Detactability of Dark Matter Subhalos by Means of the GAMMA-400 Telescope

Abstract

The potential of the planned GAMMA-400 gamma-ray telescope for detecting subhalos of mass between 10{sup 6}M{sub ⊙} and 10{sup 9}M{sub ⊙} in the Milky Way Galaxy that consist of annihilating dark matter in the form of weakly interacting massive particles (WIMPs) is studied. The inner structure of dark matter subhalos and their distribution in the Milky Way Galaxy are obtained on the basis of respective theoretical models. Our present analysis shows that the expected gamma-ray flux from subhalos depends strongly on the WIMP mass and on the subhalo concentration, but that it depends less strongly on the subhalo mass. Optimistically, a flux of 10 to 100 ph per year in the energy range above 100 MeV can be expected from the closest and most massive subhalos, which can therefore be thought to be detectable sources for GAMMA-400. Because of the smallness of fluxes, however, only via a joint analysis of future GAMMA-400 data and data from other telescopes would it become possible to resolve the inner structure of the subhalos. Also, the recent subhalo candidates 3FGL J2212.5+0703 and J1924.8–1034 are considered within our model. Our conclusion is that these sources hardly belong to the subhalo population.

Authors:
; ; ; ;  [1]; ;  [2]
  1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
  2. National Research Nuclear University MEPhI (Russian Federation)
Publication Date:
OSTI Identifier:
22761726
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CONCENTRATION RATIO; GAMMA RADIATION; MASS; MEV RANGE 10-100; MILKY WAY; NONLUMINOUS MATTER; PH VALUE; TELESCOPES; WIMPS

Citation Formats

Egorov, A. E., E-mail: eae14@yandex.ru, Galper, A. M., Topchiev, N. P., Leonov, A. A., Suchkov, S. I., Kheymits, M. D., and Yurkin, Yu. T. Detactability of Dark Matter Subhalos by Means of the GAMMA-400 Telescope. United States: N. p., 2018. Web. doi:10.1134/S1063778818030110.
Egorov, A. E., E-mail: eae14@yandex.ru, Galper, A. M., Topchiev, N. P., Leonov, A. A., Suchkov, S. I., Kheymits, M. D., & Yurkin, Yu. T. Detactability of Dark Matter Subhalos by Means of the GAMMA-400 Telescope. United States. doi:10.1134/S1063778818030110.
Egorov, A. E., E-mail: eae14@yandex.ru, Galper, A. M., Topchiev, N. P., Leonov, A. A., Suchkov, S. I., Kheymits, M. D., and Yurkin, Yu. T. Tue . "Detactability of Dark Matter Subhalos by Means of the GAMMA-400 Telescope". United States. doi:10.1134/S1063778818030110.
@article{osti_22761726,
title = {Detactability of Dark Matter Subhalos by Means of the GAMMA-400 Telescope},
author = {Egorov, A. E., E-mail: eae14@yandex.ru and Galper, A. M. and Topchiev, N. P. and Leonov, A. A. and Suchkov, S. I. and Kheymits, M. D. and Yurkin, Yu. T.},
abstractNote = {The potential of the planned GAMMA-400 gamma-ray telescope for detecting subhalos of mass between 10{sup 6}M{sub ⊙} and 10{sup 9}M{sub ⊙} in the Milky Way Galaxy that consist of annihilating dark matter in the form of weakly interacting massive particles (WIMPs) is studied. The inner structure of dark matter subhalos and their distribution in the Milky Way Galaxy are obtained on the basis of respective theoretical models. Our present analysis shows that the expected gamma-ray flux from subhalos depends strongly on the WIMP mass and on the subhalo concentration, but that it depends less strongly on the subhalo mass. Optimistically, a flux of 10 to 100 ph per year in the energy range above 100 MeV can be expected from the closest and most massive subhalos, which can therefore be thought to be detectable sources for GAMMA-400. Because of the smallness of fluxes, however, only via a joint analysis of future GAMMA-400 data and data from other telescopes would it become possible to resolve the inner structure of the subhalos. Also, the recent subhalo candidates 3FGL J2212.5+0703 and J1924.8–1034 are considered within our model. Our conclusion is that these sources hardly belong to the subhalo population.},
doi = {10.1134/S1063778818030110},
journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 3,
volume = 81,
place = {United States},
year = {2018},
month = {5}
}