Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Cheng, Ji‐Gui"'
Autor:
Zou, Le, Cheng, Ji-Gui
Magnetar is proposed as one of the possible central engines for a gamma-ray burst (GRB). Recent studies show that if a magnetar has a rotational axis misaligned from the magnetic one, a periodic lightcurve pattern is expected with a period of seconds
Externí odkaz:
http://arxiv.org/abs/2408.06225
Publikováno v:
Phys. Rev. D 108, 063015 (2023)
Weakly interacting massive particles, as a major candidate of dark matter (DM), may directly annihilate or decay into high-energy photons, producing monochromatic spectral lines in the gamma-ray band. These spectral lines, if detected, are smoking-gu
Externí odkaz:
http://arxiv.org/abs/2308.16762
The observed spectral shapes variation and tentative bimodal burst energy distribution (E-distribution) of fast radio burst (FRB) 20121102A with the FAST telescope are great puzzles. Adopting the published multifrequency data observed with the FAST a
Externí odkaz:
http://arxiv.org/abs/2305.02598
The observed hard TeV gamma-ray spectrum of the nearby gamma-ray burst (GRB) 190829A may challenge the conventional leptonic GRB afterglow model. It has been proposed that an ultra-high-energy (UHE; $\varepsilon^{'}_{\rm p}\sim 10^{20}$ eV) proton po
Externí odkaz:
http://arxiv.org/abs/2304.10188
Publikováno v:
Phys. Rev. D 108, 083034 (2023)
A recent result from Fermilab suggests that the measured W-boson mass deviates from the prediction of the Standard Model (SM) with a significance of $>7\sigma$, and there may exist new physics beyond the SM. It is proposed that the inert two Higgs do
Externí odkaz:
http://arxiv.org/abs/2204.04688
The adiabatic growth of a black hole (BH) may enhance the dark matter (DM) density surrounding it, causing a spike in the DM density profile. The spike around the supermassive BH at the center of the Milky Way may lead to a dramatic enhancement of th
Externí odkaz:
http://arxiv.org/abs/2203.08078
A hard TeV $\gamma$-ray component excess over the single-zone leptonic model prediction (TeV excess) is observed in the spectral energy distributions (SEDs) of some BL Lacs. Its origin is uncertain. We revisit this issue with four BL Lacs (1ES 0229+2
Externí odkaz:
http://arxiv.org/abs/2201.08148
Autor:
Zou, Le, Liang, En-Wei, Zhong, Shu-Qing, Yang, Xing, Zheng, Tian-Ci, Cheng, Ji-Gui, Deng, Can-Min, LV, Hou-Jun, Wang, Shan-Qin
Assuming that the shallow-decaying phase in the early X-ray lightcurves of gamma-ray bursts (GRBs) is attributed to the dipole radiations (DRs) of a newborn magnetar, we present a comparative analysis for the magnetars born in death of massive stars
Externí odkaz:
http://arxiv.org/abs/2110.07114
Publikováno v:
Phys. Rev. D 105, 043011 (2022)
Ultracompact minihalo (UCMH) is a special type of dark matter halo with a very steep density profile which may form in the early universe seeded by an overdense region or a primordial black hole. Constraints on its abundance give valuable information
Externí odkaz:
http://arxiv.org/abs/2109.09575
Axion-like particles (ALPs) provide a feasible explanation for the observed lower TeV opacity of the Universe. If the anomaly TeV transparency is caused by ALPs, then the fluxes of distant extragalactic sources will be enhanced at photon energies bey
Externí odkaz:
http://arxiv.org/abs/2012.15513