Eppur non si trovano: Comments on the Primordial Black Hole Limits in the Galactic Halo

2025/10/22 by P. Mróz, A. Udalski, Mróz, P. +32 · 3 voices · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Instrumentation and Methods for Astrophysics (astro-ph.IM) #astro-ph.CO #astro-ph.GA #astro-ph.IM #gr-qc

paper · pdf · doi:10.48550/arxiv.2510.20005

openalex publication_date 2025/10/22 · arxiv published 2025/10/22 · arxiv updated 2025/10/22 · openalex created_date 2025/10/25 · openalex updated_date 2026/07/28

Abstract

In a recent arXiv post, Hawkins & Garcia-Bellido raised doubts on the results of 20-yr long OGLE photometric monitoring, which did not find a large number of gravitational microlensing events in the direction of the Magellanic Clouds. These results implied that primordial black holes and other compact objects with masses from 10^-8 to 10³ M_solar cannot comprise a substantial fraction of the Milky Way dark matter halo. Unfortunately, the Hawkins & Garcia-Bellido post contained a number of scientific misrepresentations of our work. Here, we demonstrate that their arguments lack a solid basis or are simply incorrect. As we show below, "and yet they are not found" - compact objects (including primordial black holes) in the dark halo of the Milky Way remain undetected, despite extensive searches.

Cited by

• Primordial black holes: constraints, potential evidence and prospects

Discussions

• #arXiv #OGLE Eppur non si trovano: Comments on the Primordial Black Hole Limits in the Galactic Halo https://arxiv.org/abs/2510.20005 A critical analysis of the recent OGLE limits on stellar mass prim [bsky, 2 points, 1 comments]
• #arXiv #OGLE Eppur non si trovano: Comments on the Primordial Black Hole Limits in the Galactic Halo arxiv.org/abs/2510.20005 A critical analysis of the recent OGLE limits on stellar mass primordial b [bsky, 0 points, 0 comments]
• # arXiv # OGLE Eppur non si trovano: Comments on the Primordial Black Hole Limits in the Galactic Halo https:// arxiv.org/abs/2510.20005 A critical analysis of the recent OGLE limits on stellar mass p [mastodon, 0 points, 1 comments]

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