2020/12/26 by Claudio Corianò, Corianò, Claudio, Paul H. Frampton +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #astro-ph.GA #gr-qc #hep-ph
paper · pdf · doi:10.48550/arxiv.2012.13821
7 pages 1 figure, revised version. Previously the full text appeared as arXiv:2011.02037v2, which was submitted as a replacement accidentally
openalex publication_date 2020/12/26 · arxiv created 2021/06/24 · arxiv updated 2021/06/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the published constraints on MACHOs in the mass region 102 - 105 M\odot and their possible contribution to dark matter. We focus on constraints which rely on the accretion of matter which emits X-rays that can lead, after downgrading to microwaves, to distortion of the CMB spectrum and isotropy. The most questionable step in this chain of arguments is the use of overly simplified accretion models. We compare how the same accretion models apply to X-ray observations from supermassive black holes SMBHs, M87 and Sgr A*. The comparison of these two SMBHs with intermediate mass MACHOs suggests that the latter could, after all, provide the constituents of all the dark matter. We discuss the status of other constraints on IM-MACHOs.