AI Article Synopsis
- Dark matter might consist of compact dark objects (CDOs) that interact weakly with normal matter and can move within the Earth.
- A CDO in the Earth's inner core has a roughly 55-minute orbital period, which could create time-varying signals detectable by gravimeters.
- Current data from superconducting gravimeters suggest CDOs can only exist inside the Earth if their mass and orbital radius are extremely small, specifically if their product is less than 1.2×10^{-13} times the mass and radius of Earth.
Article Abstract
Dark matter could be composed of compact dark objects (CDOs). These objects may interact very weakly with normal matter and could move freely inside the Earth. A CDO moving in the inner core of the Earth will have an orbital period near 55 min and produce a time-dependent signal in a gravimeter. Data from superconducting gravimeters rule out such objects moving inside the Earth unless their mass m_{D} and or orbital radius a are very small so that m_{D}a<1.2×10^{-13}M_{⊕}R_{⊕}. Here, M_{⊕} and R_{⊕} are the mass and radius of the Earth, respectively.
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| http://dx.doi.org/10.1103/PhysRevLett.124.051102 | DOI Listing |
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