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arXiv 2201.06511gr-qcastro-ph.COastro-ph.EPastro-ph.HEhep-phnucl-th
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引力搜索近地黑洞或其他致密暗天体

Gravitational search for near Earth black holes or other compact dark objects

Tomoyo Namigata, C. J. Horowitz, R. Widmer-Schnidrig

摘要:

原始黑洞的质量与小行星相当,是暗物质的一个有吸引力的可能性。此外,其他形式的暗物质也可以形成致密暗天体(CDO)。我们寻找小的潮汐加速度从低质量的黑洞或CDO轨道靠近地球,并没有发现。利用德国西南部黑森林天文台和西非贝宁北部Djougou的超导重力仪大约10年的数据,我们设定了绕地球轨道运行的任何黑暗物体的最大质量上限,作为轨道半径的函数。对于小于两个地球半径的半长轴,我们排除了所有质量大于6.7 × 10 ^{13} kg的黑洞或CDO。较低质量的原始黑洞可能受到霍金辐射的强烈约束。我们的结论是,近地黑洞是极不可能的。

英文摘要:

Primordial black holes, with masses comparable to asteroids, are an attractive possibility for dark matter. In addition, other forms of dark matter could form compact dark objects (CDO). We search for small tidal accelerations from low mass black holes or CDOs orbiting near the Earth, and find none. Using about 10 years of data from the superconducting gravimeters in the Black Forest Observatory in South-Western Germany and at Djougou, Northern Benin in Western Africa we set an upper limit on the maximum mass of any dark object orbiting the Earth as a function of orbital radius. For semi-major axis less than two earth radii we exclude all black holes or CDOs with masses larger than 6.7x10^{13} kg. Lower mass primordial black holes may be strongly constrained by Hawking radiation. We conclude that near Earth black holes are extremely unlikely.

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