Thomas Lacroix
Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy
Lacroix, Thomas; Bœhm, Céline; Silk, Joseph
Authors
Céline Bœhm
Joseph Silk
Abstract
Using the spectral energy distribution of M87, a nearby radio galaxy in the Virgo cluster, and assuming a supermassive black hole induced spike in the dark matter halo profile, we exclude any dark matter candidate with a velocity-independent (s-wave) annihilation cross-section of the order of ⟨σv⟩∼10−26 cm3 s−1 and a mass up to O(100) TeV. These limits supersede all previous constraints on thermal, s-wave, annihilating dark matter candidates by orders of magnitude, and rule out the entire canonical mass range. We remark in addition that, under the assumption of a spike, dark matter particles with a mass of a few TeV and an annihilation cross-section of ∼10−27 cm3 s−1 could explain the TeV γ-ray emission observed in M87. A central dark matter spike is plausibly present around the supermassive black hole at the center of M87, for various, although not all, formation scenarios, and would have profound implications for our understanding of the dark matter microphysics.
Citation
Lacroix, T., Bœhm, C., & Silk, J. (2015). Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy. Physical Review D, 92(4), Article 043510. https://doi.org/10.1103/physrevd.92.043510
Journal Article Type | Article |
---|---|
Publication Date | Aug 15, 2015 |
Deposit Date | Feb 3, 2016 |
Publicly Available Date | Mar 28, 2024 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 92 |
Issue | 4 |
Article Number | 043510 |
DOI | https://doi.org/10.1103/physrevd.92.043510 |
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Copyright Statement
Reprinted with permission from the American Physical Society: Lacroix, Thomas and Bœhm, Céline and Silk, Joseph (2015) 'Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy.', Physical review D., 92 (4). 043510. © 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
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