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16 papers · 2 filters
The Distance Duality Relation from Strong Gravitational Lensing
Kai Liao, Zhengxiang Li, Shuo Cao +3
Under very general assumptions of metric theory of spacetime, photons traveling along null geodesics and photon number conservation, two observable concepts of cosmic distance, i.e…
Comparison of cosmological models using standard rulers and candles
Xiaolei Li, Shuo Cao, Xiaogang Zheng +2
In this paper, we used standard rulers and standard candles (separately and jointly) to explore five popular dark energy models under assumption of spatial flatness of the Universe…
Cosmology with Strong Lensing Systems
Shuo Cao, Marek Biesiada, Raphaël Gavazzi +2
In this paper, we assemble a catalog of 118 strong gravitational lensing systems from SLACS, BELLS, LSD and SL2S surveys and use them to constrain the cosmic equation of state. In…
Detecting Relic Gravitational Waves by Pulsar Timing Arrays: Effects of Cosmic Phase Transitions and Relativistic Free-Streaming Gases
Xiao-Jin Liu, Wen Zhao, Yang Zhang +1
Relic gravitational waves (RGWs) generated in the early Universe form a stochastic GW background, which can be directly probed by measuring the timing residuals of millisecond puls…
A method to search for bulk motions in the ICM with {\sl Chandra} CCD spectra: application to the Bullet cluster
Ang Liu, Heng Yu, Paolo Tozzi +1
We propose a strategy to search for bulk motions in the intracluster medium (ICM) of merging clusters based on {\sl Chandra} CCD data. Our goal is to derive robust measurements of…
Primordial Gravitational Waves Measurements and Anisotropies of CMB Polarization Rotation
Si-Yu Li, Jun-Qing Xia, Mingzhe Li +2
Searching for the signal of primordial gravitational waves in the B-modes (BB) power spectrum is one of the key scientific aims of the cosmic microwave background (CMB) polarizatio…