Excluding Primordial Black Holes as Dark Matter Based on Solar System Ephemeris

TL;DR

This paper uses precise Solar System ephemeris data to significantly restrict the possible mass range of primordial black holes as dark matter candidates, ruling out a large portion of the previously allowed window.

Contribution

It demonstrates that Solar System ephemeris measurements can effectively constrain primordial black holes as dark matter, narrowing the viable mass range.

Findings

Major part of the PBH dark matter window is ruled out.

External mass within 50 au has not changed significantly in recent decades.

Solar System dynamics provide strong constraints on dark matter candidates.

Abstract

Current cosmological constraints allow primordial black holes (PBHs) to constitute dark matter in the mass range of $10^{18}$-$10^{22}$g. We show that a major portion of this logarithmic window can be ruled-out based on the Solar System ephemeris, given that the external mass enclosed within 50 au from the Sun did not change by more than $\sim 5\times 10^{-14}$ solar masses per year in recent decades.