量子星辐射将气体转化为一个合并的伴星系
Sergei Balashev1, Pasquier Noterdaeme2,3, Neeraj Gupta4
1Department of Theoretical Astrophysics, Ioffe Institute, Saint Petersburg, Russia. s.balashev@gmail.com.
Nature
|May 21, 2025
概括
在星系的合并中, 类星体辐射会破坏分子气体, 这揭示了局部负面反影响银河系进化.
科学领域:
- 天文学与天体物理学
- 宇宙进化
- 星系的形成和演变
背景情况:
- 类星体是超大质量黑洞积聚的高能量物体.
- 据信星系的合并会触发类星体活动并影响周围的气体,但观测证据有限.
研究的目的:
- 调查类星体辐射对一个主要的星系系统中的气体特性的影响.
- 提供关于类星体,星系合并和恒星形成相互作用的观测约束.
主要方法:
- 在红移 z ≈ 2.7 时观察一个主要的合并系统.
- 分析气体特性,包括激发,密度和大小,以应对类星辐射.
主要成果:
- 量子星辐射直接改变了合并系统中的伴星系的气体特性.
- 尘埃分子气体高度激发,并被限制在紧的云块中 (密度为10^5-10^6 cm^-3,大小小小于0.02 pc).
- 这种干扰阻止了新星的形成, 留下只有密集的小云.
结论:
- 大型星系的合并在启动类星体活动中起着至关重要的作用.
- 从类星体的局部负反深刻地改变了内部气体结构,可能会阻止恒星形成.
- 这些发现为早期宇宙中调节星系演变的机制提供了新的见解.
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