211 citations · 803 across the 25 of their papers we have counts for
12 papers · 1 filter
A Model-independent Method to Determine Using Time-Delay Lensing, Quasars and Type Ia Supernovae
Xiaolei Li, Ryan E. Keeley, Arman Shafieloo +1
Absolute distances from strong lensing can anchor Type Ia Supernovae (SNe Ia) at cosmological distances giving a model-independent inference of the Hubble constant (). Future…
Revising the Hubble constant, spatial curvature and dark energy dynamics with the latest observations of quasars
Tonghua Liu, Shuo Cao, Xiaolei Li +4
In this paper, we use a newly compiled sample of ultra-compact structure in radio quasars and strong gravitational lensing systems with quasars acting as background sources to cons…
Hubble diagram at higher redshifts: Model independent calibration of quasars
Xiaolei Li, Ryan E. Keeley, Arman Shafieloo +4
In this paper, we present a model-independent approach to calibrate the largest quasar sample. Calibrating quasar samples is essentially constraining the parameters of the linear r…
Multiple measurements of quasars acting as standard probes: model independent calibration and exploring the Dark Energy Equation of States
Xiaogang Zheng, Shuo Cao, Marek Biesiada +3
Recently, two classes of quasar samples were identified, which are promising as new cosmological probes extending to higher redshifts. The first sample uses the nonlinear relation…
Generalized Emergent Dark Energy Model and the Hubble Constant Tension
Weiqiang Yang, Eleonora Di Valentino, Supriya Pan +2
We investigate a generalized form of the phenomenologically emergent dark energy model, known as generalized emergent dark energy (GEDE), introduced by Li and Shafieloo [Astrophys.…
Model-independent constraints on cosmic curvature: implication from updated Hubble diagram of high-redshift standard candles
Yuting Liu, Shuo Cao, Tonghua Liu +4
The cosmic curvature () is a fundamental parameter for cosmology. In this paper, we propose an improved model-independent method to constrain the cosmic curvature, which is ge…
Evidence for Emergent Dark Energy
Xiaolei Li, Arman Shafieloo
We introduce a generalised form of an emergent dark energy model with one degree of freedom for the dark energy sector that has the flexibility to include both CDM model as well…
A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension
Xiaolei Li, Arman Shafieloo
Motivated by the current status of the cosmological observations and significant tensions in the estimated values of some key parameters assuming the standard CDM model, we prop…
The Quest for the Inflationary Spectral Runnings in the Presence of Systematic Errors
Xiaolei Li, Noah Weaverdyck, Saroj Adhikari +3
Cosmological inflation predicts that the scalar spectral index "runs" with scale. Constraints on the values of the spectral runnings, and…
Testing and selecting cosmological models with ultra-compact radio quasars
Xiaolei Li, Shuo Cao, Xiaogang Zheng +3
In this paper, we place constraints on four alternative cosmological models under the assumption of the spatial flatness of the Universe: CPL, EDE, GCG and MPC. A new compilation o…
Test of parametrized post-Newtonian gravity with galaxy-scale strong lensing systems
Shuo Cao, Xiaolei Li, Marek Biesiada +3
Based on a mass-selected sample of galaxy-scale strong gravitational lenses from the SLACS, BELLS, LSD and SL2S surveys and using a well-motivated fiducial set of lens-galaxy param…
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…