Copyright:Len Fulham
原文:
In a flash, the visible spectrum of the Sun changed from absorption to emission on March 9 during the total solar eclipse. That fleeting moment, at the beginning the total eclipse phase, is captured by telephoto lens and diffraction grating in this image from clearing skies over Ternate, Indonesia. At left, the overwhelming light from the Sun is just blocked by the lunar disk. The normally dominant absorption spectrum of the solar photosphere is hidden. What remains, spread by the diffraction grating into the spectrum of colors to the right of the eclipsed Sun, are individual eclipse images. The images appear at each wavelength of light emitted by atoms along the thin visible arc of the solar chromosphere and in an enormous prominence extending beyond the Sun’s upper limb. The brightest images, or strongest chromospheric emission lines, are due to Hydrogen atoms that produce the red hydrogen alpha emission at the far right and blue hydrogen beta emission to the left. In between, the bright yellow emission image is caused by atoms of Helium, an element only first discovered in the flash spectrum of the Sun.
中文翻譯:
在3月9日的日全食中，太陽的可見光譜瞬間由吸收轉為發射。這一瞬間在印尼特爾納特清澈的天空下，透過遠攝鏡頭和衍射光柵捕捉到。在圖像的左側，太陽的強烈光芒正被月球遮擋，通常顯現的太陽光球層的吸收光譜隱藏了起來。右側的光譜顏色中，隨著衍射光柵散佈出來的，是每一個波長的光線所發出的獨立日食影像。這些影像在太陽色球層薄薄的可見弧線上與恆星的巨大耀斑一起出現。最明亮的影像或最強的色球層發射線是由氫原子造成的，最右側是紅色的氫α發射，左側則是藍色的氫β發射。在其間，明亮的黃色發射影像是由氦原子造成的，這是一種在太陽閃光譜中首次被發現的元素。
#日全食 #總日食 #太陽光譜 #色球層 #氫發射 #氦 #天文現象 #印尼 #特爾納特 #天文攝影 #科學探索
來源:NASA每日圖片
