86 citations · 518 across the 14 of their papers we have counts for
6 papers · 1 filter
GRB afterglows: deep Newtonian phase and its application
Y. F. Huang, T. Lu, K. S. Cheng
Gamma-ray burst afterglows have been observed for months or even years in a few cases. It deserves noting that at such late stages, the remnants should have entered the deep Newton…
Unified Classical and Quantum Radiation Mechanism for Ultra-Relativistic Electrons in Curved and Inhomogeneous Magnetic Fields
T. Harko, K. S. Cheng
We analyze the general radiation emission mechanism from a charged particle moving in a curved inhomogeneous magnetic field. The consideration of the gradient makes the curved vacu…
Pulsar Timing at Urumqi Astronomical Observatory: Observing System and Results
N. Wang, R. N. Manchester, J. Zhang +5
A pulsar timing system has been operating in the 18-cm band at the Urumqi Astronomical Observatory 25-m telescope since mid-1999. Frequency resolution allowing dedispersion of the…
The formation and merger of compact objects in central engine of active galactic nuclei and quasars: gamma-ray burst and gravitational radiation
K. S. Cheng, Jian-Min Wang
The production rate of compact objects, i.e. neutron stars (NS) and black holes (BH), in active galactic nuclei (AGN) and quasars (QSO), where the frequent supernova explosion is u…
A Possible Energy Mechanism for Cosmological Gamma-ray Bursts
K. S. Cheng, Y. Lu
We suggest that an extreme Kerr black hole with a mass , a dimensionless angular momentum and a marginal stable orbital radius $r_{ms}\sim 3r_s\sim 10^{…
Is GRO J1744-28 a Strange Star?
K. S. Cheng, Z. G. Dai, D. M. Wei +1
The unusal hard x-ray burster GRO J1744-28 recently discovered by the Compton Gamma-ray Observatory (GRO) can be modeled as a strange star with a dipolar magnetic field $\le 10^{11…