Searching for dark matter X-ray lines from the Large Magellanic Cloud with eROSITA
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911530505732096 |
|---|---|
| author | Calvo, Jorge Terol Taoso, Marco Caputo, Andrea Negro, Michela Regis, Marco |
| author_facet | Calvo, Jorge Terol Taoso, Marco Caputo, Andrea Negro, Michela Regis, Marco |
| contents | We perform a search for an X-ray monochromatic line arising from dark matter (DM) decay in the halo of the Large Magellanic Cloud. An emission line can be expected from two well-motivated DM candidates: sterile neturinos and axion-like particles (ALPs). We analyze the eROSITA-DE DR1 datasets in the energy range between 1 and 9 keV. No evidence for a DM line is found, and we set lower limits on the DM lifetime. We then recast these bounds into upper limits on the active-sterile neutrino mixing angle $\sin^2(2θ)$ and on the ALP to photon coupling $g_{aγ}$, for DM masses between 2 and 18 keV. These results set new strong constraints for masses below 5 keV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_19109 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Searching for dark matter X-ray lines from the Large Magellanic Cloud with eROSITA Calvo, Jorge Terol Taoso, Marco Caputo, Andrea Negro, Michela Regis, Marco High Energy Physics - Phenomenology High Energy Astrophysical Phenomena We perform a search for an X-ray monochromatic line arising from dark matter (DM) decay in the halo of the Large Magellanic Cloud. An emission line can be expected from two well-motivated DM candidates: sterile neturinos and axion-like particles (ALPs). We analyze the eROSITA-DE DR1 datasets in the energy range between 1 and 9 keV. No evidence for a DM line is found, and we set lower limits on the DM lifetime. We then recast these bounds into upper limits on the active-sterile neutrino mixing angle $\sin^2(2θ)$ and on the ALP to photon coupling $g_{aγ}$, for DM masses between 2 and 18 keV. These results set new strong constraints for masses below 5 keV. |
| title | Searching for dark matter X-ray lines from the Large Magellanic Cloud with eROSITA |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.19109 |