Leinweber Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
Berkeley Center for Theoretical Physics, University of California, Berkeley, CA 94720, USA., Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Observations of nearby galaxies and galaxy clusters have reported an unexpected x-ray emission line around 3.5 kilo–electron volts (keV). Proposals to explain this line include decaying dark matter—in particular, that the decay of sterile neutrinos with a mass around 7 keV could match the available data. If this interpretation is correct, the 3.5-keV line should also be emitted by dark matter in the halo of the Milky Way. We used more than 30 megaseconds of XMM-Newton (X-ray Multi-Mirror Mission) blank-sky observations to test this hypothesis, finding no evidence of the 3.5-keV line emission from the Milky Way halo. We set an upper limit on the decay rate of dark matter in this mass range, which is inconsistent with the possibility that the 3.5-keV line originates from dark matter decay.
Dessert, Christopher, et al. "The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations." Science, vol. 367, no. 6485, Mar. 2020. https://doi.org/10.1126/science.aaw3772
Dessert, Christopher, Rodd, Nicholas L., & Safdi, Benjamin R. (2020). The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations. Science, 367(6485). https://doi.org/10.1126/science.aaw3772
Dessert, Christopher, Rodd, Nicholas L., and Safdi, Benjamin R., "The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations," Science 367, no. 6485 (2020), https://doi.org/10.1126/science.aaw3772
@article{osti_1606473,
author = {Dessert, Christopher and Rodd, Nicholas L. and Safdi, Benjamin R.},
title = {The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations},
annote = {Observations of nearby galaxies and galaxy clusters have reported an unexpected x-ray emission line around 3.5 kilo–electron volts (keV). Proposals to explain this line include decaying dark matter—in particular, that the decay of sterile neutrinos with a mass around 7 keV could match the available data. If this interpretation is correct, the 3.5-keV line should also be emitted by dark matter in the halo of the Milky Way. We used more than 30 megaseconds of XMM-Newton (X-ray Multi-Mirror Mission) blank-sky observations to test this hypothesis, finding no evidence of the 3.5-keV line emission from the Milky Way halo. We set an upper limit on the decay rate of dark matter in this mass range, which is inconsistent with the possibility that the 3.5-keV line originates from dark matter decay.},
doi = {10.1126/science.aaw3772},
url = {https://www.osti.gov/biblio/1606473},
journal = {Science},
issn = {ISSN 0036-8075},
number = {6485},
volume = {367},
place = {United States},
publisher = {American Association for the Advancement of Science (AAAS)},
year = {2020},
month = {03}}
Strüder, Lothar; Englhauser, Jakob; Hartmann, Robert
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 512, Issue 1-2https://doi.org/10.1016/S0168-9002(03)01917-X
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 551, Issue 2-3https://doi.org/10.1016/j.nima.2005.05.068
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium, AIP Conference Proceedingshttps://doi.org/10.1063/1.3149419