147 citations · 1.7k across the 59 of their papers we have counts for
6 papers · 2 filters
X-Ray afterglow of SWIFT J1644+57: a Compton echo?
K. S. Cheng, D. O. Chernyshov, V. A. Dogiel +2
Swift, Chandra and XMM have found a weak but nearly constant X-ray component from Swift J1644+57 that appeared at ~500 days and was visible at least until ~ 1400 days after the ste…
Probing gamma-ray emissions of Fermi-LAT pulsars with a non-stationary outer gap model
J. Takata, C. W. Ng, K. S. Cheng
We explore a non-stationary outer gap scenario for gamma-ray emission process in pulsar magnetosphere. Electrons/positrons that migrate along the magnetic field line and enter the…
Measuring dark energy with the correlation of gamma-ray bursts using model-independent methods
J. S. Wang, F. Y. Wang, K. S. Cheng +1
In this paper, we use two model-independent methods to standardize long gamma-ray bursts (GRBs) using the correlation, where is the isotropic-…
Searches for millisecond pulsar candidates among the unidentified Fermi objects
C. Y. Hui, S. M. Park, C. P. Hu +9
Here we report the results of searching millisecond pulsar (MSP) candidates from the Fermi LAT second source catalog (2FGL). Seven unassociated ray sources in this catalog are…
Spectrum of Relativistic and Subrelativistic Cosmic Rays in the 100 pc Central Region
V. A. Dogiel, D. O. Chernyshov, A. M. Kiselev +6
From the rate of hydrogen ionization and the gamma ray flux, we derived the spectrum of relativistic and subrelativistic cosmic rays (CRs) nearby and inside the molecular cloud Sgr…
Constraining the bulk Lorentz factor from the photosphere emission
Yuan-Chuan Zou, K. S. Cheng, F. Y. Wang
We propose a direct and model-independent method to constrain the Lorentz factor of a relativistically expanding object, like gamma-ray bursts. Only the measurements, such as therm…