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High energy emission of GRB 130821A: constraining the density profile of the circum-burst medium as well as the initial Lorentz factor of the outflow
Yun-Feng Liang, Bei Zhou, Hao-Ning He +3
GRB 130821A was detected by Fermi-GBM/LAT, Konus-Wind, SPI-ACS/INTEGRAL, RHESSI and Mars Odyssey-HEND. Although the data of GRB 130821A are very limited, we show in this work that…
Model-dependent estimate on the connection between fast radio bursts and ultra-high energy cosmic rays
Xiang Li, Bei Zhou, Hao-Ning He +2
The existence of fast radio bursts (FRBs), a new type of extragalatic transients, has been established recently and quite a few models have been proposed. In this work we discuss t…
A supra-massive magnetar central engine for short GRB 130603B
Yi-Zhong Fan, Yun-Wei Yu, Dong Xu +4
We show that the peculiar early optical and in particular X-ray afterglow emission of the short duration burst GRB 130603B can be explained by continuous energy injection into the…
Cosmological Time Dilation in Durations of Swift Long Gamma-Ray Bursts
Fu-Wen Zhang, Yi-Zhong Fan, Lang Shao +1
Cosmological time dilation is a fundamental phenomenon in an expanding universe, which stresses that both the duration and wavelength of the emitted light from a distant object at…
Is the late near-infrared bump in short-hard GRB 130603B due to the Li-Paczynski kilonova?
Zhi-Ping Jin, Dong Xu, Yi-Zhong Fan +2
Short-hard gamma-ray bursts (GRBs) are widely believed to be produced by the merger of two binary compact objects, specifically by two neutron stars or by a neutron star orbiting a…
TeV-PeV neutrinos over the atmospheric background: originating from two groups of sources?
Hao-Ning He, Rui-Zhi Yang, Yi-Zhong Fan +1
In addition to the two ~1 PeV neutrinos, the IceCube Collaboration recently reported a detection of 26 neutrino candidates at energies from 30 TeV to 250 TeV, implying a confidence…
High energy emission of GRB 130427A: evidence for inverse Compton radiation
Yi-Zhong Fan, P. H. T. Tam, Fu-Wen Zhang +6
A nearby super-luminous burst GRB 130427A was simultaneously detected by six -ray space telescopes ({\it Swift}, Fermi-GBM/LAT, Konus-Wind, SPI-ACS/INTEGRAL, AGILE and RHESSI) a…
Constraining the distribution of dark matter in inner galaxy with indirect detection signal: The case of tentative 130 gev γ-ray line
Rui-Zhi Yang, Lei Feng, Xiang Li +1
The dark matter distribution in the very inner region of our Galaxy is still in debate. In the N-body simulations a cuspy dark matter halo density profile is favored. Several dissi…
Diffuse PeV neutrino emission from Ultra-Luminous Infrared Galaxies
Hao-Ning He, Tao Wang, Yi-Zhong Fan +2
Ultra-luminous infrared galaxies (ULIRGs) are the most luminous and intense starburst galaxies in the Universe. Both their star-formation rate (SFR) and gas surface mass density ar…
AMS-02 positron excess: new bounds on dark matter models and hint for primary electron spectrum hardening
Lei Feng, Rui-Zhi Yang, Hao-Ning He +3
The data collected by ATIC, CREAM and PAMELA all display remarkable cosmic-ray-nuclei spectrum hardening above the magnetic rigidity 240 GV. One natural speculation is that…
Signature of gravitational radiation in afterglow of short Gamma-Ray Bursts?
Yi-Zhong Fan, Xue-Feng Wu, Da-Ming Wei
Short Gamma-Ray Bursts (GRBs), brief intense emission of rays characterized by a duration shorter than 2 seconds that are plausibly powered by the coalescence of binary neutron…