在锡拉和卡瑞布狄斯之间：双重宇宙发现
(原标题: Between Scylla and Charybdis: A Double Cosmic Discovery)
2025-06-09
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你能认出这个天体吗？可能不会，因为这是一张发现图片。大质量恒星在其核心形成重元素，几百万年后，在强大的超新星爆炸中结束生命。这些残余物冷却得相对较快并逐渐褪色，这使得它们很难被探测到。为了发现这种微弱的、以前不为人知的超新星遗迹，一群业余天文摄影师在天空调查中寻找可能的超新星遗迹候选者。其结果是：第一张超新星遗迹G115.5+9.1的图像——被发现者命名为Scylla——在神话中的埃塞俄比亚国王仙王座中微微发光。残余物中氢原子的发射用红色表示，微弱的氧原子发射用蓝色表示。令人惊讶的是，另一个发现潜伏在右上方：一个微弱的，以前未知的行星状星云候选者。为了与神话传统保持一致，它被命名为卡瑞布狄斯（赛2）——这是对荷马史诗《奥德赛》中的古希腊表达“夹在锡拉和卡瑞布狄斯之间”的致敬。
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Can you identify this celestial object? Likely not — because this is a discovery image. Massive stars forge heavy elements in their cores and, after a few million years, end their lives in powerful supernova explosions. These remnants cool relatively quickly and fade, making them difficult to detect. To uncover such faint, previously unknown supernova remnants, a dedicated group of amateur astrophotographers searched through sky surveys for possible supernova remnant candidates. The result: the first-ever image of supernova remnant G115.5+9.1 — named Scylla by its discoverers—glowing faintly in the constellation of the mythological King of Aethiopia: Cepheus. Emission from hydrogen atoms in the remnant is shown in red, and faint emission from oxygen is shown in hues of blue. Surprisingly, another discovery lurked to the upper right: a faint, previously unknown planetary nebula candidate. In keeping with mythological tradition, it was named Charybdis (Sai 2) — a nod to the ancient Greek expression "caught between Scylla and Charybdis" from Homer’s Odyssey.