论文标题
高分辨率的冠状成像仪是否可以解决冠状链？ AR 12712的结果
Is the High-Resolution Coronal Imager Resolving Coronal Strands? Results from AR 12712
论文作者
论文摘要
在第一个任务成功之后，2018年5月29日，第三次从美国新墨西哥州的白色桑德会导弹系列发射了高分辨率的冠状成像仪（HI-C）。在这种情况下，以〜4s的节奏捕获目标活性区域AR 12712的17.2 nm数据的329秒，板刻度为0.129'/pixel。使用HI-C 2.1捕获的数据以及SDO/AIA 17.1 NM的共对准观测值，我们研究了49个冠状链的宽度。我们搜索AIA未检测到的链中的子结构的证据，并进一步考虑是否通过HI-C 2.1完全解决了这些链。借助多尺度高斯归一化（MGN），研究了低发射区域的链，只能与深色，基础苔藓的对比度可视化。这些低排放链与目标活性区域内较高发射区域的区域进行了比较。发现HI-C 2.1可以解决〜202km的小链，尽管看到的宽度更典型，宽度为〜513公里。对于低排放区域内的冠状链，最可能的宽度明显狭窄，高度较窄。这将低发射的冠状动脉链放在SDO/AIA的分辨能力下，突出了具有HI-C的分辨能力的永久太阳天文台的需求。
Following the success of the first mission, the High-Resolution Coronal Imager (Hi-C) was launched for a third time (Hi-C 2.1) on 29th May 2018 from the White Sands Missile Range, NM, USA. On this occasion, 329 seconds of 17.2 nm data of target active region AR 12712 was captured with a cadence of ~4s, and a plate scale of 0.129''/pixel. Using data captured by Hi-C 2.1 and co-aligned observations from SDO/AIA 17.1 nm we investigate the widths of 49 coronal strands. We search for evidence of substructure within the strands that is not detected by AIA, and further consider whether these strands are fully resolved by Hi-C 2.1. With the aid of Multi-Scale Gaussian Normalization (MGN), strands from a region of low-emission that can only be visualized against the contrast of the darker, underlying moss are studied. A comparison is made between these low-emission strands with those from regions of higher emission within the target active region. It is found that Hi-C 2.1 can resolve individual strands as small as ~202km, though more typical strands widths seen are ~513km. For coronal strands within the region of low-emission, the most likely width is significantly narrower than the high-emission strands at ~388km. This places the low-emission coronal strands beneath the resolving capabilities of SDO/AIA, highlighting the need of a permanent solar observatory with the resolving power of Hi-C.
