Glossary term: X射線
Description: X 射線是一種電磁波，其能量低於伽馬射線，但高於紫外輻射。光譜中的 X 射線部分通常定義為波長範圍在10 皮米到 10 納米之間。這相當於大約 30 拍赫茲到 30 艾赫茲之間的頻率。由此產生的光子（光粒子）的能量範圍大約在 100 eV 到 100 keV 之間，這裡用到的是粒子物理學中常用單位 "電子伏特"。
在天文學中，大量的 X 射線輻射通常來自高溫（溫度高於一百萬開爾文）的氣體或等離子體區域。例如我們太陽的日冕和其他恆星的星冕，以及緻密天體周圍的吸積盤：氣體向中子星或黑洞墜落，在極熱的盤中旋轉，最後落到中心天體上或進入中心天體。超新星遺跡是另一類常見的天文 X 射線源：當一顆大質量恆星在其生命末期以超新星的形式爆發時，恆星的外層會被拋向太空。當這些被拋出的氣體遇到周圍的星際介質時，沖擊效應會將碰撞區域的物質加熱到很高的溫度，從而產生 X 射線。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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