396 citations · 1.2k across the 30 of their papers we have counts for
30 papers
HI Intensity Mapping cross-correlation with thermal SZ fluctuations: forecasted cosmological parameters estimation for FAST and Planck
Ayodeji Ibitoye, Furen Deng, Yichao Li +2
The 21 cm emission from neutral hydrogen surveys holds great potential as a valuable method for exploring the large-scale structure of the Universe. In this paper, we forecast for…
Detections of 21-cm absorption with a blind FAST survey at z 0.09
Wenkai Hu, Yougang Wang, Yichao Li +10
We present the early science results from a blind search of the extragalactic HI 21-cm absorption lines at z 0.09 with the drift-scan observation of the Five-hundred-me…
Detecting HI Galaxies with Deep Neural Networks in the Presence of Radio Frequency Interference
Ruxi Liang, Furen Deng, Zepei Yang +9
In neutral hydrogen (HI) galaxy survey, a significant challenge is to identify and extract the HI galaxy signal from observational data contaminated by radio frequency interference…
The foreground transfer function for HI intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications
Steven Cunnington, Laura Wolz, Philip Bull +8
Blind cleaning methods are currently the preferred strategy for handling foreground contamination in single-dish HI intensity mapping surveys. Despite the increasing sophistication…
FRB dark sirens: Measuring the Hubble constant with unlocalized fast radio bursts
Ze-Wei Zhao, Ji-Guo Zhang, Yichao Li +2
Fast radio bursts (FRBs) can be used to measure cosmological parameters by employing the Macquart relation. However, at present, only a small number of FRB events are localized to…
Eliminating polarization leakage effect for neutral hydrogen intensity mapping with deep learning
Li-Yang Gao, Yichao Li, Shulei Ni +1
The neutral hydrogen (HI) intensity mapping (IM) survey is regarded as a promising approach for cosmic large-scale structure (LSS) studies. A major issue for the HI IM survey is to…
Constraints on dark matter annihilation from the FAST observation of the Coma Berenices dwarf galaxy
Wen-Qing Guo, Yichao Li, Xiaoyuan Huang +4
The Galactic center -ray excess, detected by the Fermi-LAT, is a very attractive tentative signal from dark matter annihilation. Searching for associated synchrotron emissions c…
HI intensity mapping with MeerKAT: power spectrum detection in cross-correlation with WiggleZ galaxies
Steven Cunnington, Yichao Li, Mario G. Santos +13
We present a detection of correlated clustering between MeerKAT radio intensity maps and galaxies from the WiggleZ Dark Energy Survey. We find a detection of the cross-corre…
The Tianlai dish array low-z surveys forecasts
Olivier Perdereau, Réza Ansari, Albert Stebbins +23
We present the science case for surveys with the Tianlai dish array interferometer tuned to the frequency range. Starting from a realistic…
Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data
Melis O. Irfan, Philip Bull, Mario G. Santos +6
21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the MHz GHz regime. We use pilot MHz data fro…
1/f Noise Analysis for FAST HI Intensity Mapping Drift-Scan Experiment
Wenkai Hu, Yichao Li, Yougang Wang +8
We investigate the 1/f noise of the Five-hundred-meter Aperture Spherical Telescope (FAST) receiver system using drift-scan data from an intensity mapping pilot survey. All the 19…
HI constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps
Laura Wolz, Alkistis Pourtsidou, Kiyoshi W. Masui +18
We present the joint analysis of Neutral Hydrogen (HI) Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) sample…
Data Processing Pipeline For Tianlai Experiment
Shifan Zuo, Jixia Li, Yichao Li +7
The Tianlai project is a 21cm intensity mapping experiment aimed at detecting dark energy by measuring the baryon acoustic oscillation (BAO) features in the large scale structure p…
HI intensity mapping with MeerKAT: Calibration pipeline for multi-dish autocorrelation observations
Jingying Wang, Mario G. Santos, Philip Bull +10
While most purpose-built 21cm intensity mapping experiments are close-packed interferometer arrays, general-purpose dish arrays should also be capable of measuring the cosmological…
The Tianlai Dish Pathfinder Array: design, operation and performance of a prototype transit radio interferometer
Fengquan Wu, Jixia Li, Shifan Zuo +34
The Tianlai Dish Pathfinder Array is a radio interferometer designed to test techniques for 21~cm intensity mapping in the post-reionization universe as a means for measuring large…
HI intensity mapping with MeerKAT: 1/f noise analysis
Yichao Li, Mario G. Santos, Keith Grainge +2
The nature of the time correlated noise component (the 1/f noise) of single dish radio telescopes is critical to the detectability of the HI signal in intensity mapping experiments…
The Tianlai Cylinder Pathfinder Array: System Functions and Basic Performance Analysis
Jixia Li, Shifan Zuo, Fengquan Wu +35
The Tianlai Cylinder Pathfinder is a radio interferometer array designed to test techniques for 21 cm intensity mapping in the post-reionization Universe, with the ultimate aim of…
Reconstructing the radial velocity profile of cosmic voids with kinematic Sunyaev-Zeldovich Effect
Yi-Chao Li, Yin-Zhe Ma, Seshadri Nadathur
We develop an estimator to extract the mean radial velocity profile of cosmic voids via the kinematic Sunyaev-Zeldovich effect of pairs of galaxies surrounding them. The estimator…
Forecasts of cosmological constraints from HI intensity mapping with FAST, BINGO & SKA-I
Elimboto Yohana, Yi-Chao Li, Yin-Zhe Ma
We forecast the cosmological constraints of the neutral hydrogen (HI) intensity mapping (IM) technique with radio telescopes by assuming 1-year of observational time. The current a…
Searching for HI imprints in cosmic web filaments with 21-cm intensity mapping
Denis Tramonte, Yin-Zhe Ma, Yi-Chao Li +1
We investigate the possible presence of neutral hydrogen (HI) in intergalactic filaments at very low redshift (), by stacking a set of 274,712 2dFGRS galaxy pairs over…
Progress in the Construction and Testing of the Tianlai Radio Interferometers
Santanu Das, Christopher J. Anderson, Reza Ansari +44
The Tianlai Pathfinder is designed to demonstrate the feasibility of using a wide field of view radio interferometers to map the density of neutral hydrogen in the Universe after t…
Measurement of the pairwise kinematic Sunyaev-Zeldovich effect with Planck and BOSS data
Yi-Chao Li, Yin-Zhe Ma, Mathieu Remazeilles +1
We present a new measurement of the kinetic Sunyaev-Zeldovich effect (kSZ) using Planck cosmic microwave background (CMB) and Baryon Oscillation Spectroscopic Survey (BOSS) data. U…
Constraints on Primordial non-Gaussianity from Future HI Intensity Mapping Experiments
Yi-Chao Li, Yin-Zhe Ma
The primordial non-Gaussianity induces scale-dependent bias of the \hi with respect to the underlying dark matter, which exhibits features on the very large scales of the 21-cm pow…
Sky reconstruction for the Tianlai cylinder array
Jiao Zhang, Shifan Zuo, Reza Ansari +5
In this paper, we apply our sky map reconstruction method for transit type interferometers to the Tianlai cylinder array. The method is based on the spherical harmonic decompositio…