scholarly journals Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications

2013 ◽  
Vol 88 (8) ◽  
Author(s):  
M. Ackermann ◽  
M. Ajello ◽  
A. Albert ◽  
A. Allafort ◽  
L. Baldini ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Spectral Lines ◽  
Large Area

scholarly journals On a Possible Origin of the Gamma-ray Excess around the Galactic Center

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1432
Author(s):  
Dmitry O. Chernyshov ◽  
Andrei E. Egorov ◽  
Vladimir A. Dogiel ◽  
Alexei V. Ivlev
Keyword(s):  
Dark Matter ◽  
Gamma Rays ◽  
Molecular Clouds ◽  
Alternative Explanation ◽  
Gamma Ray ◽  
Galactic Center ◽  
The Self ◽  
Large Area ◽  
Mhd Turbulence ◽  
The Standard Model

Recent observations of gamma rays with the Fermi Large Area Telescope (LAT) in the direction of the inner galaxy revealed a mysterious excess of GeV. Its intensity is significantly above predictions of the standard model of cosmic rays (CRs) generation and propagation with a peak in the spectrum around a few GeV. Popular interpretations of this excess are that it is due to either spherically distributed annihilating dark matter (DM) or an abnormal population of millisecond pulsars. We suggest an alternative explanation of the excess through the CR interactions with molecular clouds in the Galactic Center (GC) region. We assumed that the excess could be imitated by the emission of molecular clouds with depleted density of CRs with energies below ∼10 GeV inside. A novelty of our work is in detailed elaboration of the depletion mechanism of CRs with the mentioned energies through the “barrier” near the cloud edge formed by the self-excited MHD turbulence. This depletion of CRs inside the clouds may be a reason for the deficit of gamma rays from the Central Molecular Zone (CMZ) at energies below a few GeV. This in turn changes the ratio between various emission components at those energies and may potentially absorb the GeV excess by a simple renormalization of key components.

scholarly journals Search for dark matter signatures in the gamma-ray emission towards the Sun with the Fermi Large Area Telescope

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
M. N. Mazziotta ◽  
F. Loparco ◽  
D. Serini ◽  
A. Cuoco ◽  
P. De La Torre Luque ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
The Sun ◽  
Large Area ◽  
Gamma Ray Emission

scholarly journals Search for gamma-ray spectral lines from dark matter annihilation in dwarf galaxies with the High-Altitude Water Cherenkov observatory

2020 ◽  
Vol 101 (10) ◽  
Author(s):  
A. Albert ◽  
R. Alfaro ◽  
C. Alvarez ◽  
J. C. Arteaga-Velázquez ◽  
K. P. Arunbabu ◽  
...  
Keyword(s):  
Dark Matter ◽  
High Altitude ◽  
Gamma Ray ◽  
Dwarf Galaxies ◽  
Spectral Lines ◽  
Dark Matter Annihilation

scholarly journals Search for gamma-ray spectral lines with the DArk Matter Particle Explorer

2021 ◽  
Author(s):  
Francesca Alemanno ◽  
Qi An ◽  
Philipp Azzarello ◽  
Felicia Carla Tiziana Barbato ◽  
Paolo Bernardini ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Dark Matter Particle ◽  
Spectral Lines

scholarly journals Angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its dark matter interpretation

2016 ◽  
Vol 94 (12) ◽  
Author(s):  
Mattia Fornasa ◽  
Alessandro Cuoco ◽  
Jesús Zavala ◽  
Jennifer M. Gaskins ◽  
Miguel A. Sánchez-Conde ◽  
...  
Keyword(s):  
Dark Matter ◽  
Power Spectrum ◽  
Gamma Ray ◽  
Large Area ◽  
Angular Power Spectrum ◽  
Gamma Ray Emission

scholarly journals Indirect searches for dark matter with the Fermi LAT instrument

2014 ◽  
Vol 29 (22) ◽  
pp. 1430030 ◽  
Author(s):  
M. N. Mazziotta ◽  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Weakly Interacting Massive Particles ◽  
Current Status ◽  
Large Area ◽  
Weakly Interacting ◽  
Electron Positron ◽  
Massive Particles ◽  
Particle Dark Matter

In this review the current status of several searches for particle dark matter with the Fermi Large Area Telescope instrument is presented. In particular, the current limits on the weakly interacting massive particles, obtained from the analyses of gamma-ray and cosmic ray electron/positron data, will be illustrated.

scholarly journals Search for gamma-ray emission from dark matter annihilation in the large magellanic cloud with the fermi large area telescope

2015 ◽  
Vol 91 (10) ◽  
Author(s):  
Matthew R. Buckley ◽  
Eric Charles ◽  
Jennifer M. Gaskins ◽  
Alyson M. Brooks ◽  
Alex Drlica-Wagner ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Large Area ◽  
Dark Matter Annihilation ◽  
Gamma Ray Emission
Sign in / Sign up

Export Citation Format

Share Document