789 citations · 2.4k across the 26 of their papers we have counts for
27 papers
Search for Ultra-Relativistic Magnetic Monopoles with LHAASO-KM2A
Zhen Cao, F. Aharonian, Y. X. Bai +335
Ultra-relativistic magnetic monopoles traversing the atmosphere are expected to initiate extensive air showers characterized by a muon deficit and a compact lateral profile. Using…
LHAASO-WCDA observed a 5 days TeV-delayed flaring event in blazar 1ES 1959+650
Zhen Cao, F. Aharonian, Y. X. Bai +339
We report a day-scale hard lag between GeV and TeV -ray emission from the HBL 1ES~1959+650 in early 2024. Since the LHAASO-WCDA real-time monitoring system began operation in la…
The Persistent Radio Sources and Multi-wavelength Counterparts of Fast Radio Bursts in Massive Binary Systems
Z. Y. Zhao, Q. Wu, F. Y. Wang +1
Fast radio bursts (FRBs) are millisecond-duration pulses originating from cosmological distances. Multi-wavelength counterparts associated with FRBs are important for unveiling the…
A unified model of active repeating fast radio bursts associated with persistent radio sources
F. Y. Wang, H. T. Lan, Z. Y. Zhao +5
Fast radio bursts (FRBs) are intense pulses with unknown origins. A subclass of repeating FRBs show some common features, such as associated compact persistent radio sources (PRSs)…
Measuring Hubble constant using localized and unlocalized fast radio bursts
D. H. Gao, Q. Wu, J. P. Hu +4
The Hubble constant () is one of the most important parameters in the standard model. The measurements given by the main two methods show a gap larger than , wh…
Constraints on heavy decaying dark matter from 570 days of LHAASO observations
The LHAASO Collaboration, Zhen Cao, F. Aharonian +276
The Kilometer Square Array~(KM2A) of the Large High Altitude Air Shower Observatory (LHAASO) aims at surveying the northern gamma-ray sky at energies above 10 TeV with unprecedente…
The Large High Altitude Air Shower Observatory (LHAASO) Science Book (2021 Edition)
Zhen Cao, D. della Volpe, Siming Liu +87
Since the science white paper of the Large High Altitude Air Shower Observatory (LHAASO) published on arXiv in 2019 [e-Print: 1905.02773 (astro-ph.HE)], LHAASO has completed the tr…
eXTP -- enhanced X-ray Timing and Polarimetry Mission
S. N. Zhang, M. Feroci, A. Santangelo +181
eXTP is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. Primary targets include isolated and binary neutron star…
The High Energy cosmic-Radiation Detection (HERD) Facility onboard China's Future Space Station
S. N. Zhang, the HERD collaboration
The High Energy cosmic-Radiation Detection (HERD) facility is one of several space astronomy payloads of the cosmic lighthouse program onboard China's Space Station, which is plann…
X-Ray Afterglow Plateaus of Long Gamma-Ray Bursts: Further Evidence for Millisecond Magnetars
S. X. Yi, Z. G. Dai, X. F. Wu +1
Many long-duration gamma-ray bursts (GRBs) were observed by {\it Swift}/XRT to have plateaus in their X-ray afterglow light curves. This plateau phase has been argued to be evidenc…
Spin Evolution of Millisecond Magnetars with Hyperaccreting Fallback Disks: Implications for Early Afterglows of Gamma-Ray Bursts
Z. G. Dai, Ruo-Yu Liu
The shallow decay phase or plateau phase of early afterglows of gamma-ray bursts (GRBs), discovered by Swift, is currently understood as being due to energy injection to a relativi…
Optical and gamma-ray emissions from internal forward-reverse shocks: application to GRB 080319B?
Y. W. Yu, X. Y. Wang, Z. G. Dai
In the popular internal shock model for the prompt emission of gamma-ray bursts (GRBs), collisions between a series of relativistic shells generate lots of paired forward and rever…
Echo Emission From Dust Scattering and X-Ray Afterglows of Gamma-Ray Bursts
L. Shao, Z. G. Dai, N. Mirabal
We investigate the effect of X-ray echo emission in gamma-ray bursts (GRBs). We find that the echo emission can provide an alternative way of understanding X-ray shallow decays and…
The shock break-out of GRB 060218/SN 2006aj
S. Campana, V. Mangano, A. J. Blustin +36
Although the link between long Gamma Ray Bursts (GRBs) and supernovae (SNe) has been established, hitherto there have been no observations of the beginning of a supernova explosion…
Constraining and Dark Energy with Gamma-Ray Bursts
Z. G. Dai, E. W. Liang, D. Xu
An relationship with a small scatter for current -ray burst (GRB) data was recently reported, where is the beaming-correc…
High energy neutrinos from magnetars
Bing Zhang, Z. G. Dai, P. Meszaros +2
Magnetars can accelerate cosmic rays to high energies through the unipolar effect, and are also copious soft photon emitters. We show that young, fast-rotating magnetars whose spin…
Spectrum and Duration of Delayed MeV-GeV Emission of Gamma-Ray Bursts in Cosmic Background Radiation Fields
Z. G. Dai, T. Lu
We generally analyze prompt high-energy emission above a few hundreds of GeV due to synchrotron self-Compton scattering in internal shocks. However, such photons cannot be detected…
Overall Temporal Synchrotron Emissions from Relativistic Jets: Adiabatic and Radiative Breaks
Zhuo Li, Z. G. Dai, T. Lu
We discuss the GRB afterglow emission from a relativistic jet that is initially in the radiative regime in which the accelerated electrons are fast cooling. We note that such a ``s…
GRB Afterglows from Anisotropic Jets
Z. G. Dai, L. J. Gou
Some progenitor models of gamma-ray bursts (GRBs) (e.g., collapsars) may produce anisotropic jets in which the energy per unit solid angle is a power-law function of the angle ($\p…
Could the Unusual Optical Afterglow of GRB 000301c Arise from a Non-relativistic Shock with Energy Injection?
Z. G. Dai, T. Lu
Recent observations on the GRB 000301c afterglow show that three breaks appear in the R-band light curve, and in particular the decay slope at late times is as steep as -3.0. This…
Neutrino Afterglows and Progenitors of Gamma-Ray Bursts
Z. G. Dai, T. Lu
Currently popular models for progenitors of gamma-ray bursts (GRBs) are the mergers of compact objects and the explosions of massive stars. These two cases have distinctive environ…
Environment and Energy Injection Effects in GRB Afterglows
Z. G. Dai, T. Lu
In a recent paper (Dai & Lu 1999), we have proposed a simple model in which the steepening in the light curve of the R-band afterglow of the gamma-ray burst (GRB) 990123 is caused…
Intrinsic Parameters of GRB990123 from Its Prompt Optical Flash and Afterglow
X. Y. Wang, Z. G. Dai, T. Lu
We have constrained the intrinsic parameters, such as the magnetic energy density fraction (), the electron energy density fraction (), the initial Lorentz factor ($Γ_0…
The Afterglow of GRB 990123 and a Dense Medium
Z. G. Dai, T. Lu
Recent observations show that the temporal decay of the R-band afterglow from GRB 990123 steepened about 2.5 days after the burst. We here propose a possible explanation for such a…