GK Per：新星和行星狀星雲
GK Per: Nova and Planetary Nebula
來源：Deep Sky Collective｜發表日期：2024-04-30
已知的恆星系統 GK Per 只與圖中三個星雲中的兩個有關。 珀爾塞新星 1901 （GK Persei）距離 1500 光年，是目前記錄到的第二近的新星。位於最中心的是一顆白矮星，它曾是一顆類太陽恆星的殘存核心。白矮星周圍環繞著圓形的焰火星雲，這是白矮星表面熱核爆炸噴射出的氣體，也就是 1901 年記錄的新星。圍繞著煙花星雲的紅色發光氣體是曾經圍繞著中心恆星的大氣層。這些氣體在新星爆發前被排出，呈現為瀰漫行星狀星雲。 橫貫其中的微弱灰色氣體是星際捲雲，似乎只是恰巧經過。 1901 年，GK Per 的新星變得比參宿四更亮。同樣，恆星系統 T CrB 預計將在今年晚些時候爆發新星，但我們並不知道它的確切時間和亮度。
原文：The star system GK Per is known to be associated with only two of the three nebulas pictured. At 1500 light years distant, Nova Persei 1901 (GK Persei) was the second closest nova yet recorded. At the very center is a white dwarf star, the surviving core of a former Sun-like star. It is surrounded by the circular Firework nebula, gas that was ejected by a thermonuclear explosion on the white dwarf's surface -- a nova -- as recorded in 1901. The red glowing gas surrounding the Firework nebula is the atmosphere that used to surround the central star. This gas was expelled before the nova and appears as a diffuse planetary nebula. The faint gray gas running across is interstellar cirrus that seems to be just passing through coincidently. In 1901, GK Per's nova became brighter than Betelgeuse. Similarly, star system T CrB is expected to erupt in a nova later this year, but we don't know exactly when nor how bright it will become.
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
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