在邻近的十赫兹引力波源上,巨大的黑洞二进制星体的印记
Jakob Stegmann1,2, Lorenz Zwick3,4, Sander M Vermeulen2,5
1Max Planck Institute for Astrophysics, Garching, Germany.
Nature astronomy
|October 21, 2024
概括
超大质量黑洞双星 (SMBHBs) 可以通过观察它们对较小双星系统引力波的微妙影响来检测. 这种新的方法可以揭示整个宇宙时间的SMBHB种群.
科学领域:
- 天体物理学和宇宙学
- 引力波天文学 引力波天文学
- 黑洞物理学 黑洞物理学
背景情况:
- 宇宙中的大质量黑洞通常在合并星系的中心形成双星.
- 有证据表明,超大质量黑洞双星 (SMBHBs) 可能会合并,可以通过引力波背景检测到.
- 目前的检测方法,如干扰仪和脉冲星计时,对最庞大的SMBHBs有局限性.
研究的目的:
- 提出一种新的策略,用于在低频引力波波段 (10−5 Hz) 中检测单个超大质量黑洞双星 (SMBHBs).
- 确定SMBHBs的丰富性,并了解它们与宿主星系的共同进化.
- 为了克服当前重力波检测方法对大规模SMBHBs的局限性.
主要方法:
- 调查SMBHBs在同一星系内恒星质量双星系发出的引力波上打印的长期调制.
- 利用拟议的十赫兹引力波干扰仪,能够检测到众多恒星质量双星.
- 分析引力波信号以寻找微妙的调制,表明附近的SMBHBs.
主要成果:
- SMBHBs可以在1 kpc距离内的恒星质量二进制星体的引力波上引起可检测的长期调制.
- 德西赫兹引力波干扰仪可以检测大约10−1到104个SMBHBs,质量为107108太阳质量.
- 这种检测方法有效的红移大约为3.5.5.
结论:
- 这项研究提出了一种新的方法,使用引力波调制来检测单个超大质量黑洞双星 (SMBHBs).
- 拟议的十赫兹引力波探测器提供了一个独特的机会,可以在整个宇宙历史中绘制SMBHBs人口的地图.
- 这种方法可以揭示SMBHB种群,否则无法使用当前和近期的观察技术.
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