Adaptive scale model reconstruction for radio synthesis imaging
Adaptive scale model reconstruction for radio synthesis imaging
复制标题
放射合成成像的自适应尺度模型重建
DOI:
10.1088/1674-4527/21/3/63
复制
发表时间:
2021
影响因子:
1.8
通讯作者:
Wu Zhong-Zu
中科院分区:
文献类型:
--
作者:
Zhang Li;Mi Li-Gong;Xu Long;Zhang Ming;Li Dan-Yang;Liu Xiang;Wang Feng;Xiao Yi-Fan;Wu Zhong-Zu
A sky model from CLEAN deconvolution is a particularly effective high dynamic range reconstruction in radio astronomy, which can effectively model the sky and remove the sidelobes of the point spread function (PSF) caused by incomplete sampling in the spatial frequency domain. Compared to scale-free and multi-scale sky models, adaptive-scale sky modeling, which can model both compact and diffuse features, has been proven to have better sky modeling capabilities in narrowband simulated data, especially for large-scale features in high-sensitivity observations which are exactly one of the challenges of data processing for the Square Kilometre Array (SKA). However, adaptive scale CLEAN algorithms have not been verified by real observation data and allow negative components in the model. In this paper, we propose an adaptive scale model algorithm with non-negative constraint and wideband imaging capacities, and it is applied to simulated SKA data and real observation data from the Karl G. Jansky Very Large Array (JVLA), an SKA precursor. Experiments show that the new algorithm can reconstruct more physical models with rich details. This work is a step forward for future SKA image reconstruction and developing SKA imaging pipelines.
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影响因子:
56.9
作者:
R. M. Emberson
通讯作者:
R. M. Emberson
DOI:
10.1007/s11433-018-9360-x
发表时间:
2019-01
期刊:
Science China Physics, Mechanics & Astronomy
影响因子:
--
作者:
T. An
通讯作者:
T. An
影响因子:
6.5
作者:
L. Zhang
通讯作者:
L. Zhang
影响因子:
64.8
作者:
J. Pawsey;R. PAYNE-SOOTT;L. McCready
通讯作者:
J. Pawsey;R. PAYNE-SOOTT;L. McCready
影响因子:
6.5
作者:
L. Zhang;L. Zhang;S. Bhatnagar;U. Rau;M. Zhang
通讯作者:
L. Zhang;L. Zhang;S. Bhatnagar;U. Rau;M. Zhang