Technical comment on the paper of Dessert et al. "The dark matter interpretation of the 3.5 keV line is inconsistent with blank-sky observations"
Alexey Boyarsky, Denys Malyshev, Oleg Ruchayskiy, Denys Savchenko
SciPost Astro. Core 1, 001 (2021) · published 4 May 2021
- doi: 10.21468/SciPostAstroCore.1.1.001
An unidentified line at energy around 3.5 keV was detected in the spectra of dark matter-dominated objects. Recent work of Dessert et al. [1812.06976] used 30 Msec of XMM-Newton blank-sky observations to constrain the admissible line flux, challenging its dark matter decay origin. We demonstrate that these bounds are overestimated by more than an order of magnitude due to improper background modeling. Therefore the dark matter interpretation of the 3.5 keV signal remains viable.
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Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 Alexey Boyarsky,
- 2 Denys Malyshev,
- 3 Oleg Ruchayskiy,
- 4 5 Denys Savchenko
- 1 Instituut Lorentz / Lorentz Institute
- 2 Eberhard Karls Universität Tübingen / University of Tübingen
- 3 Niels Bohr Institute [NBI]
- 4 Bogolyubov Institute for Theoretical Physics [BITP]
- 5 Київський Академічний Університет / Kyiv Academic University
Funders for the research work leading to this publication