GK Per：新星和行星状星云
(原标题: GK Per: Nova and Planetary Nebula)
2024-04-30
浏览次数: 15
已知GK - Per恒星系统只与图中三个星云中的两个有关。英仙座1901新星（GK英仙座）距离我们1500光年远，是有记录以来距离我们第二近的新星。正中央是一颗白矮星，它是一颗前类太阳恒星幸存下来的核心。它被圆形的烟花星云所包围，这是1901年记录的白矮星表面热核爆炸喷出的气体——一颗新星。环绕在烟花星云周围的红色发光气体是过去环绕中心恒星的大气层。这些气体在新星形成之前被排出，并以弥漫的行星状星云的形式出现。穿过的暗淡的灰色气体是星际卷云，似乎只是碰巧经过。1901年，GK Per的新星比参宿四还要亮。同样，恒星系统T CrB预计将在今年晚些时候爆发一颗新星，但我们不知道确切的时间，也不知道它会变得多亮。
查看原文解释
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.
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