Polarimeter to UNify the Corona and Heliosphere (PUNCH): Science, Status, and Path to Flight
Polarimeter to UNify the Corona and Heliosphere (PUNCH): Science, Status, and Path to Flight
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统一日冕和日光层的旋光仪 (PUNCH)：科学、现状和飞行路径
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
N. Waltham
中科院分区：
文献类型：
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作者：
C. Deforest;R. Killough;Sarah Gibson;Alan Henry;Traci Case;M. Beasley;G. Laurent;R. Colaninno;N. Waltham
PUNCH 是 NASA 太阳物理部门正在开发的小型探索者星座任务。 PUNCH 将对日冕外层和日球层内太阳风之间的过渡区进行成像，有助于统一太阳物理学和太阳风（空间）物理学领域。太阳同步低地轨道中的四颗微型卫星组成的星座将产生日冕和年轻太阳风的深场连续 3D 可见光图像，偏振可见光范围为 6R 至 180R。一颗微型卫星上的单个窄视场成像仪 (NFI) 可捕获 6 Rs 至 32 Rs 的外日冕，其余微型卫星上的三个宽视场成像仪 (WFI) 可捕获 20Rs 至 180Rs 的外日冕。这些仪器经过匹配和同步，作为一个“虚拟天文台”运行，具有以太阳为中心的 90 度视野。这些仪器使用传统的透镜光学器件和深挡板来成像可见阳光的微弱痕迹，这些痕迹是由外日冕和年轻太阳风的稀薄等离子体中的自由电子汤姆逊散射的。 PUNCH 包括偏振光学器件，利用散射的偏振物理原理生成 3D 图像。通过将成像科学从太阳向外引入日光层，PUNCH 实现了其科学目标：(1) 了解日冕结构如何变成周围的太阳风，以及 (2) 了解年轻太阳风中瞬态结构（例如日冕物质抛射）的动态演化。我们简要介绍了 PUNCH 科学，描述了实现该任务的基本技术，并报告了当前的发展状况以及在轨科学操作的未来步骤。
PUNCH is a Small Explorer constellation mission in development for NASA's Heliophysics Division. PUNCH will image the transition zone between the outer reaches of the solar corona and the solar wind in the inner heliosphere, helping to unify the fields of solar physics and solar wind (space) physics. A constellation of four microsatellites (microsats) in Sun-synchronous LEO will produce deep field, continuous, 3D visible-light images of the corona and young solar wind from 6Rs to 180Rs in polarized visible light. A single Narrow Field Imager (NFI) on one microsat captures the outer corona from 6 Rs to 32 Rs, and three Wide Field Imagers (WFIs) on the remaining microsats capture from 20Rs to 180Rs. The instruments are matched and synchronized to operate as a single “virtual observatory”, with a 90-degree field of view centered on the Sun. The instruments use conventional lens optics and deep baffles to image the faint traces of visible sunlight that are Thomson-scattered by free electrons in the tenuous plasma of the outer corona and young solar wind. PUNCH includes polarized optics to produce 3D images using the polarization physics of the scattering. By bringing imaging science outward from the Sun and into the heliosphere, PUNCH fulfills its science objectives to (1) understand how coronal structures become the ambient solar wind, and (2) to understand the dynamic evolution of transient structures (such as CMEs) in the young solar wind. We briefly introduce the PUNCH science, describe fundamental trades that enabled the mission, and report current development status and the steps ahead toward on-orbit science operations.
在第一个太阳轨道飞行器期间探索从日冕上的太阳风到内日光层的太阳风——帕克太阳探测器正交
DOI：
10.3847/2041-8213/ac282f
发表时间：
2021
期刊：
The Astrophysical Journal Letters
影响因子：
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作者：
Telloni, Daniele;Andretta, Vincenzo;Antonucci, Ester;Bemporad, Alessandro;Capuano, Giuseppe E.;Fineschi, Silvano;Giordano, Silvio;Habbal, Shadia;Perrone, Denise;Pinto, Rui F.
通讯作者：
Pinto, Rui F.