.png){kind=icon}
返回
Spatio-spectral maximum entropy method. I. Formulation and test
.png){kind=icon}
OA
AI
DOI：10.1086/498225.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The spatio-spectral maximum entropy method (SSMEM) has been developed by Komm and coworkers in 1997 for use with solar multifrequency interferometric observation. In this paper we further improve the formulation of the SSMEM to establish it as a tool for astronomical imaging spectroscopy. We maintain their original idea that spectral smoothness at neighboring frequencies can be used as an additional a priori assumption in astrophysical problems and that this can be implemented by adding a spectral entropy term to the usual maximum entropy method (MEM) formulation. We, however, address major technical difficulties in introducing the spectral entropy into the imaging problem that are not encountered in the conventional MEM. These include calculation of the spectral entropy in a generally frequency-dependent map grid, simultaneous adjustment of the temperature variables and Lagrangian multipliers in the spatial and spectral domain, and matching the solutions to the observational constraints at a large number of frequencies. We test the performance of the SSMEM in comparison with the conventional MEM.
Keyword:
Sun : radio radiation
techniques : image processing
techniques : interferometric
techniques : miscellaneous
techniques : spectroscopic
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
5.4
论文数:
8.3W
被引数:
32.0W
机构
暂无机构信息
引用论文
.png){kind=icon}
Severe blood loss anemia in a Jehovah's Witness treated with adjunctive hyperbaric oxygen therapy
PREAI
分享收藏分享收藏
查看更多内容