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Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023 Abstract Star‐forming and starburst galaxies (SBGs), which are well‐known cosmic‐ray (CR) reservoirs, are expected to emit gamma rays and neutrinos predominantly via hadronic collisions. In this work we analyze the 10‐year Fermi‐Low Energy Technique (LAT) spectral energy distributions of 13 nearby galaxies by means of a physical model that accounts for
Antonio Marinelli +5 more
wiley +1 more source
Investigating the region of 3C 397 in High Energy Gamma rays [PDF]
, 2017 We investigate the supernova remnant (SNR) 3C 397 and its neighboring pulsar PSR J1906+0722 in high energy gamma rays by using nearly six years of archival data of {\it Large Area Telescope} on board {\it Fermi Gamma Ray Space Telescope} (Fermi-LAT). The
Bhattacharjee, Pooja +4 more
core +2 more sources
SEARCH FOR DARK MATTER WITH GAMMA-RAYS: A REVIEW
Acta Polytechnica, 2013 Successfully launched in June 2008, the Fermi Gamma-ray Space Telescope, formerly named GLAST, has been observing the high-energy gamma-ray sky with unprecedented sensitivity inthe 20MeV ÷ 300 GeV energy range and electrons + positrons in the 7 GeV ...
Aldo Morselli
doaj +1 more source
Identifying the Gamma-Ray Emission of the Nearby Galaxy M83
The Astrophysical Journal, 2023 We report on the detection of a γ -ray source at the position of the nearby star-forming galaxy (SFG) M83, which is found from our analysis of 14 yr of the data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (Fermi ...
Yi Xing, Zhongxiang Wang
doaj +1 more source
Fast γ-ray Variability: A Common Feature and Powerful Probe for Jetted AGNs
Galaxies, 2018 Among the highly dynamical non-thermal universe, flashes of γ-ray photons from jets in active galactic nuclei (AGNs) are always attractive. Not only are they extraordinary observational phenomena, but they also become powerful probes of the jets ...
Neng-hui Liao
doaj +1 more source
High-energy gamma- and cosmic-ray observations with future space-based GAMMA-400 gamma-ray telescope [PDF]
EPJ Web of Conferences, 2019 The future space-based GAMMA-400 gamma-ray telescope will be installed on the Navigator platform of the Russian Astrophysical Observatory. A highly elliptical orbit will provide observations for 7-10 years of many regions of the celestial sphere ...
Topchiev N.P. +17 more
doaj +1 more source
High Energy Observational Investigations of Supernova Remnants and their Interactions with Surroundings [PDF]
Journal of Astronomy and Space Sciences, 2013 Here we review the effort of Fermi Asian Network (FAN) in exploring the supernova remnants (SNRs) with state-of-art high energy observatories, including Fermi Gamma-ray Space Telescope and Chandra X-ray Observatory, in the period of 2011- 2012 ...
Chung-Yue Hui
doaj +1 more source
Pulsar Observations with the Fermi Gamma-ray Space Telescope
, 2009 The Large Area Telescope (LAT) on Fermi, launched on 2008 June 11, is a space telescope to explore the high energy gamma-ray universe. The instrument covers the energy range from 20 MeV to 300 GeV with greatly improved sensitivity and ability to localize gamma-ray point sources.
D. Parent
openalex +3 more sources
Light speed variation from gamma ray bursts: criteria for low energy photons
European Physical Journal C: Particles and Fields, 2018 We examine a method to detect the light speed variation from gamma ray burst data observed by the Fermi Gamma-ray Space Telescope (FGST). We suggest new criteria to determine the characteristic time for low energy photons by the energy curve and the ...
Yue Liu, Bo-Qiang Ma
doaj +1 more source
Spider Invasion Across the Galaxy [PDF]
Journal of Astronomy and Space Sciences, 2014 The nature of the exotic stellar corpses which reincarnate by consuming their companion is reviewed. Apart from sucking life from their partners, they are actually eating the doomed companions away by their deadly and powerful particle/radiation beams.
Chung-Yue Hui
doaj +1 more source