Solar Eclipse Observations from the Ground and Air from 0.31 to 5.5 Microns

Solar Eclipse Observations from the Ground and Air from 0.31 to 5.5 Microns
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从地面和空中观测 0.31 至 5.5 微米的日食

DOI:
10.1007/s11207-019-1550-3
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发表时间:
2019
期刊:
影响因子:
2.8
通讯作者:
Golub, Leon
Golub, Leon
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Judge, Philip;Berkey, Ben;Boll, Alyssa;Bryans, Paul;Burkepile, Joan;Cheimets, Peter;DeLuca, Edward;de Toma, Giuliana;Gibson, Keon;Golub, Leon

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我们展示了2017年8月21日日全食期间部署的一套新型仪器的光谱和宽带偏振光数据。我们的目标是在日食期间测量热红外波长的太阳光谱,并测试测量偏振光日冕的新技术。一台在肯塔基州上空14.3千米高空飞行的红外日冕成像光谱仪,得到了来自俄勒冈州马德拉斯(海拔683米)和怀俄明州卡斯珀山怀俄巴营(海拔2402米)的地面观测数据的支持。在怀俄明州,我们部署了一台新的红外傅里叶变换光谱仪(FTS),三台由Avantes借给我们的低色散光谱仪,一台新型可见光相机PolarCam,对线偏振很敏感,以及FLIR系统公司两台红外相机中的一台,另一台在马德拉斯工作。日蚀的情况要求观测时间跨越世界时17:19到18:26。我们分析了边缘光球、色球、日珥和日冕线在310 nm至5.5 μm范围内的光谱。我们用太阳盘作为光源,用光度法校准了数据。在不同的光谱仪之间,校准的一致性优于13%。但是所获得的灵敏度不足以从地面探测到日冕线。PolarCam数据与莫纳罗亚的K-Cor天气仪器的偏振数据以及在马德拉斯获得的FLIR强度数据非常吻合。我们讨论了新的结果,包括在整个日全食期间探测到的he1083nm多重发射。FTS和AIR-Spec光谱的结合首次揭示了地壳消光对红外日冕发射线的影响,这将由即将到来的daniel K. Inouye太阳望远镜观测到。
We present spectra and broad-band polarized light data from a novel suite of instruments deployed during the 21st August 2017 total solar eclipse. Our goals were to survey solar spectra at thermal infrared wavelengths during eclipse, and to test new technology for measuring polarized coronal light. An infrared coronal imaging spectrometer, flown at 14.3 km altitude above Kentucky, was supported on the ground by observations from Madras, Oregon (elevation 683 m) and Camp Wyoba on Casper Mountain, Wyoming (2402 m). In Wyoming we deployed a new infraredFourier Transform Spectrometer(FTS), three low-dispersion spectrometers loaned to us by Avantes, a novel visible-light camera PolarCam, sensitive to linear polarization, and one of two infrared cameras from FLIR Systems, the other operated at Madras. Circumstances of eclipse demanded that the observations spanned 17:19 to 18:26 UT. We analyze spectra of the limb photosphere, the chromosphere, prominences, and coronal lines from 310 nm to 5.5 μm. We calibrated data photometrically using the solar disk as a source. Between different spectrometers, the calibrations were consistent to better than 13%. But the sensitivities achieved were insufficient to detect coronal lines from the ground. The PolarCam data are in remarkable agreement with polarization data from the K-Cor synoptic instrument on Mauna Loa, and with FLIR intensity data acquired in Madras. We discuss new results, including a detection of the Hei1083 nm multiplet in emission during the whole of totality. The combination of the FTS and AIR-Spec spectra reveals for the first time the effects of the telluric extinction on the infrared coronal emission lines, to be observed with upcomingDaniel K. Inouye Solar Telescope.
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