33 citations · 185 across the 14 of their papers we have counts for
10 papers · 1 filter
Galaxy Distribution as a Probe of the Ringlike Dark Matter Structure in the Galaxy Cluster Cl0024+17
Bo Qin, Huan-Yuan Shan, Andre Tilquin
In a galaxy cluster, galaxies are mostly collisionless particles in recent epoches. They resemble collisionless cold dark matter particles in some way. Therefore, the spatial distr…
Observational Evidence for Extra Dimensions from Dark Matter
Bo Qin, Ue-Li Pen, Joseph Silk
Recent astronomical observations of systems of dark matter, which have been cited as providing possible support for self-interacting cold dark matter, may provide evidence for the…
Intrinsic Degeneracy of Gravitational Lens Time Delays: the case for a simple quadruple system in CDM cosmology
HongSheng Zhao, Bo Qin
A degeneracy in strong lens model is shown analytically. The observed time delays and quasar image positions might {\it not} uniquely determine the concentration and the extent of…
Constraints on the Interaction between Dark Matter and Baryons from Cooling Flow Clusters
Bo Qin, Xiang-Ping Wu
Other nongravitational heating processes are needed to resolve the disagreement between the absence of cool gas components in the centers of galaxy clusters revealed recently by Ch…
Baryon Distribution in Galaxy Clusters as a Result of Sedimentation of Helium Nuclei
Bo Qin, Xiang-Ping Wu
Heavy particles in galaxy clusters tend to be more centrally concentrated than light ones according to the Boltzmann distribution. An estimate of the drift velocity suggests that i…
The Collapse of Neutron Stars in High-Mass Binaries as the Energy Source for the Gamma-Ray Bursts
Bo Qin, Xiang-Ping Wu, Ming-Chung Chu +2
The energy source has remained to be the great mystery in understanding of the gamma-ray bursts (GRBs) if the events are placed at cosmological distances as indicated by a number o…
Self-Microlensing in Compact Binary Systems
Bo Qin, Xiang-Ping Wu, Zhenlong Zou
The signature of the self-microlensing in compact binaries (white dwarfs, neutron stars and black holes) is a flare with the characteristic time of typically a few minutes. The pro…
Environmental Effect on the Associations of Background Quasars with Foreground Objects: I. Analytic Investigation
Xiang-Ping Wu, Li-Zhi Fang, Zonghong Zhu +1
The associations of the angular positions of background quasars with foreground galaxies, clusters of galaxies and quasars are often attributed to the statistical lensing by gravit…
On the Possible Variations of the Hubble Constant with Distance
Xiang-Ping Wu, Bo Qin, Li-Zhi Fang
Current measurements of the Hubble constant on scale less than Mpc appear to be controversial, while the observations made at high redshift seem to provide a relati…
On the measurement of the Hubble constant in a local low-density universe
Xiang-Ping Wu, Zugan Deng, Zhenlong Zou +2
Astrophysical observations indicate that the ``Local Universe" has a relatively lower matter density () than the predictions of the standard inflation cosmology and the large-…