106 citations · 489 across the 29 of their papers we have counts for
29 papers
The Next-Generation 21CMA Telescope: Design, Commissioning, and Instrumental Effects in an SKA-LFAA-Like System
Jun-Hua Gu, Quan Guo, Liang Dong +11
As the Square Kilometre Array (SKA) approaches operational status, its complex digital architecture introduces new instrumental challenges. To explore relevant observational and da…
MWA and VLA Observations of Diffuse Radio Lobes in M 87
Linhui Wu, Fu-Guo Xie, Qian Zheng +12
This study investigates the projected, quasi-symmetric -scale diffuse radio lobes surrounding the giant elliptical galaxy M\,87, utilizing well-sampled wideband ($\…
MeerKAT discovery of GHz radio emission extending from Abell 3017 toward Abell 3016
Dan Hu, Norbert Werner, Haiguang Xu +18
Context: The clusters Abell 3017 and Abell 3016 are located within a large-scale filament. A prominent X-ray bridge has been detected connecting the two clusters and a potential ga…
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…
Global CD/EoR Signal Detection with a Dense Digital Beamforming Array and Beyond
Junhua Gu, Jingying Wang, Huanyuan Shan +5
The global neutral hydrogen 21 cm signal extracted from the all-sky averaged radio spectra is one of the signatures of the Cosmic Dawn and Epoch of Reionization (CD/EoR). The frequ…
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…
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…
The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview
Devin Crichton, Moumita Aich, Adam Amara +97
The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a radio interferometer array currently in development, with an initial 256-element array to be deployed at the S…
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…
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…
Direct Parameter Inference from Global EoR Signal with Bayesian Statistics
Junhua Gu, Jingying Wang
In the observation of sky-averaged HI signal from Epoch of Reionization, model parameter inference can be a computation-intensive work, which makes it hard to perform a direct one-…
Contribution of Radio Halos to the Foreground for SKA EoR Experiments
Weitian Li, Haiguang Xu, Zhixian Ma +11
The overwhelming foreground contamination is one of the primary impediments to probing the Epoch of Reionization (EoR) through measuring the redshifted 21 cm signal. Among various…
Revealing A Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA observations
Yu Wang, Fuyao Lui, Zhiqiang Shen +3
By analyzing the Chandra archival data of the nearby NGC 6338 galaxy group, we identify two X-ray bright clumps (N-clump and S-clump) within the central 100 kpc, and detect an arc-…
A Chandra Study of the Image Power Spectra of 41 Cool Core and Non-Cool Core Galaxy Clusters
Chenhao Zhang, Haiguang Xu, Zhenghao Zhu +9
In this work we propose a new diagnostic to segregate cool core (CC) clusters from non-cool core (NCC) clusters by studying the two-dimensional power spectra of the X-ray images ob…
A Chandra Study of Radial Temperature Profiles of the Intra-Cluster Medium in 50 Galaxy Clusters
Zhenghao Zhu, Haiguang Xu, Jingying Wang +10
In order to investigate the spatial distribution of the ICM temperature in galaxy clusters in a quantitative way and probe the physics behind, we analyze the X-ray spectra of a sam…
The Application of Continuous Wavelet Transform Based Foreground Subtraction Method in 21 cm Sky Surveys
Junhua Gu, Haiguang Xu, Jingying Wang +2
We propose a continuous wavelet transform based non-parametric foreground subtraction method for the detection of redshifted 21 cm signal from the epoch of reionization. This metho…
Chandra Study of the Massive and Distant Galaxy Cluster SDSS J0150-1005
Zhenzhen Qin, Haiguang Xu, Jingying Wang +1
In this work, we present a high spatial resolution study of a fossil cluster, SDSS J0150-1005 (), based on the imaging spectroscopic analysis of \chandra\ observati…
Exploring the Cosmic Reionization Epoch in Frequency Space: An Improved Approach to Remove the Foreground in 21 cm Tomography
Jingying Wang, Haiguang Xu, Tao An +7
Aiming to correctly restore the redshifted 21 cm signals emitted by the neutral hydrogen during the cosmic reionization processes, we re-examine the separation approaches based on…
Kinematics of the Compact Symmetric Object OQ 208 revisited
Fang Wu, Tao An, Willem A. Baan +6
Aims. A long timeline kinematic study of the archetypal CSO OQ 208 sheds light on the physical properties of the most compact radio sources. Methods. Archival data from the VLBA at…
Chandra Observation of a Weak Shock in the Galaxy Cluster A2556
Zhenzhen Qin, Haiguang Xu, Jingying Wang +3
Based on a 21.5 ks \chandra\ observation of A2556, we identify an edge on the surface brightness profile (SBP) at about 160 kpc northeast of the cluster center, and it…
A Method to Extract the Angular Power Spectrum of the Epoch of Reionization from Low-Frequency Radio Interferometers
Qian Zheng, Xiang-ping Wu, Jun-hua Gu +2
The redshifted 21cm signal of neutral hydrogen from the epoch of reionization (EoR) is extremely weak and its first detection is therefore expected to be statistical with first-gen…
Influence of synchrotron self-absorption on the 21cm experiments
Qian Zheng, Xiang-Ping Wu, Jun-Hua Gu +2
Presence of spectral curvature due to synchrotron self-absorption (SSA) of extragalactic radio sources may break down the spectral smoothness feature-the premise that bright radio…
Two-Phase ICM in the Central Region of the Rich Cluster of Galaxies Abell 1795: A Joint Chandra, XMM-Newton, and Suzaku View
Liyi Gu, Haiguang Xu, Junhua Gu +7
Based on a detailed analysis of the high-quality Chandra, XMM-Newton, and Suzaku data of the X-ray bright cluster of galaxies Abell 1795, we report clear evidence for a two-phase i…
How to Identify and Separate Bright Galaxy Clusters from the Low-frequency Radio Sky?
Jingying Wang, Haiguang Xu, Junhua Gu +6
In this work we simulate the MHz radio sky that is constrained in the field of view ( radius) of the 21 Centimeter Array (21CMA), by carrying out Monte-Carlo si…