arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2501.01009astro-ph.SR
收藏

2024年4月8日日食期间“弥漫”日冕He I 1083的探测:地球大气散射起源的证据

Detection of "diffuse" coronal He I 1083 during the April 8 2024 Solar Eclipse: evidence for terrestrial atmospheric scattering origin

M. E. Molnar, R. Casini, P. Bryans, B. Berkey, K. Tyson

AI总结:

本文利用CHEESE仪器在2024年4月8日日全食期间观测He I 1083 nm光谱,发现该信号在日冕和月面均出现,证明其源于地球大气散射而非太阳日冕中性氦。

摘要:

在先前日全食期间,已在月轮边缘上方的日冕高度处测量到强He I 1083 nm原子线信号。这一相当出乎意料的测量引发了一场关于日冕条件下是否存在显著量中性氦的讨论。我们利用新研制的CHEESE仪器在2024年4月8日日全食期间对He I 1083 nm光谱区域进行了光谱观测,以检验太阳日冕中He I 1083的存在。我们在日食观测中探测到了He I 1083、禁戒日冕线Fe XIII 1074.7 nm以及色球H I 1093.8 nm Paschen-γ线。色球He I 1083和H I 1093.8 nm Paschen-γ线在日冕以及月面上均被探测到。我们的发现表明,2024年4月8日日食期间He I 1083信号具有非太阳起源,这对从日食观测推断出的太阳日冕中存在丰富中性氦的观点提出了挑战。

英文摘要:

Strong He I 1083 nm atomic line signals have been previously measured during total solar eclipses at coronal heights above the lunar limb. This rather unexpected measurement has kindled a discussion about the hypothesized presence of significant amounts of neutral helium at coronal conditions. We performed spectroscopic observations of the He I 1083 nm spectroscopic region with the newly built CHEESE instrument during the April 8th 2024 total solar eclipse to test the presence of He I 1083 in the solar corona. We detected the He I 1083, the forbidden coronal line Fe XIII 1074.7 nm, as well as the chromospheric H I 1093.8 nm Paschen-γ line in our eclipse observations. The chromospheric He I 1083 and H I 1093.8 nm Paschen-γ lines are detected in the corona as well as on the lunar disc. Our findings point toward a non-solar origin of the He I 1083 signal during the April 8th 2024 eclipse that challenge the notion of abundant neutral helium in the solar corona inferred from eclipse observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑