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arXiv 2004.14192astro-ph.EPhep-phhep-th
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寻找外太阳系黑洞

Searching for a Black Hole in the Outer Solar System

Edward Witten

摘要:

在太阳系外,有迹象表明有一个质量为$5-10$ $M_\oplus$的新物体(“行星9”),距离大约500 AU。如果它是一个相对传统的行星,它可以在望远镜搜索中找到。另一种说法是,这个天体可能是一个原始的黑洞(PBH)。在这种情况下,常规搜索将失败。一个可能的替代方案是使用小型激光发射航天器探测该物体的引力场,就像突破摄星计划中设想的那样。以$.001~c$量级的速度,这样的航天器可以在发射后大约十年到达行星9,如果他们能向地球报告精确到$10^{-5}$秒的定时测量,就可以发现它。

英文摘要:

There are hints of a novel object ("Planet 9") with a mass $5-10$ $M_\oplus$ in the outer Solar System, at a distance of order 500 AU. If it is a relatively conventional planet, it can be found in telescopic searches. Alternatively, it has been suggested that this body might be a primordial black hole (PBH). In that case, conventional searches will fail. A possible alternative is to probe the gravitational field of this object using small, laser-launched spacecraft, like the ones envisioned in the Breakthrough Starshot project. With a velocity of order $.001~c$, such spacecraft can reach Planet 9 roughly a decade after launch and can discover it if they can report timing measurements accurate to $10^{-5}$ seconds back to Earth.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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