哈勃望远镜拍摄的年轻星团特朗普勒14
影像来源与版权:NASA, ESA, and J. Maíz Apellániz (IoAoA Spain); Acknowledgment: N. Smith (U. Arizona)

说明:为什么星团特朗普勒14拥有这么多明亮的恒星?因为它太年轻了。许多恒星是在过去500万年中形成的,它们非常炽热,能发射出可检测的X射线。在较古老的星团中,大多数年轻恒星通常会在超新星爆炸中消亡,遗留下的恒星会变得更暗、更红。特朗普勒14的跨度约为40光年,位于著名的船底座星云边缘、距离我们约9千光年远处。在这幅由哈勃太空望远镜于2006年拍摄的特朗普勒14精细影像中,明眼人能够发现两个不同寻常的天体。第一个天体是影像中央左侧的暗云,它可能是一个行星系,试图在被特朗普勒14大质量恒星的高能恒星风摧毁之前形成。第二个天体是影像左下方的光弧,有一则假说认为它是一道超音速激波,由10万年前从一个完全不同的星团中喷射出的一颗高速恒星发出。
翻译:北京天文馆

Young Star Cluster Trumpler 14 from Hubble
Image Credit & Copyright: NASA, ESA, and J. Maíz Apellániz (IoAoA Spain); Acknowledgment: N. Smith (U. Arizona)

Explanation: Why does star cluster Trumpler 14 have so many bright stars? Because it is so young. Many cluster stars have formed only in the past 5 million years and are so hot they emit detectable X-rays. In older star clusters, most stars this young have already died — typically exploding in a supernova — leaving behind stars that are fainter and redder. Trumpler 14 spans about 40 light years and lies about 9,000 light years away on the edge of the famous Carina Nebula. A discerning eye can spot two unusual objects in this detailed 2006 image of Trumpler 14 by the Hubble Space Telescope. First, a dark cloud just left of center may be a planetary system trying to form before being destroyed by the energetic winds of Trumpler 14’s massive stars. Second is the arc at the bottom left, which one hypothesis holds is the supersonic shock wave of a fast star ejected 100,000 years ago from a completely different star cluster.
Astronomy Picture of the Day 05/14/2019