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Dark matter line emission constraints from NuSTAR observations of the Bullet Cluster

Riemer-Sørensen, S. and Wik, D. and Madejski, G. and Molendi, S. and Gastaldello, F. and Harrison, F. A. and Craig, W. W. and Hailey, C. J. and Boggs, S. E. and Christensen, F. E. and Stern, D. and Zhang, W. W. and Hornstrup, A. (2015) Dark matter line emission constraints from NuSTAR observations of the Bullet Cluster. Astrophysical Journal, 810 (1). Art. No. 48. ISSN 0004-637X. doi:10.1088/0004-637X/810/1/48.

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Line emission from dark matter is well motivated for some candidates e.g. sterile neutrinos. We present the first search for dark matter line emission in the 3-80keV range in a pointed observation of the Bullet Cluster with NuSTAR. We do not detect any significant line emission and instead we derive upper limits (95% CL) on the flux, and interpret these constraints in the context of sterile neutrinos and more generic dark matter candidates. NuSTAR does not have the sensitivity to constrain the recently claimed line detection at 3.5keV, but improves on the constraints for energies of 10-25keV.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wik, D.0000-0001-8952-676X
Harrison, F. A.0000-0003-2992-8024
Boggs, S. E.0000-0001-9567-4224
Christensen, F. E.0000-0001-5679-1946
Stern, D.0000-0003-2686-9241
Zhang, W. W.0000-0002-1426-9698
Additional Information:© 2015 The American Astronomical Society. Received 2015 July 6; accepted 2015 July 28; published 2015 August 27. This research made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by NASA, and it also made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology (USA). Facility: NuSTAR - The NuSTAR (Nuclear Spectroscopic Telescope Array) mission
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:dark matter – line: identification – X-rays: galaxies: clusters
Issue or Number:1
Record Number:CaltechAUTHORS:20150801-092701193
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59136
Deposited By: Joy Painter
Deposited On:06 Aug 2015 18:37
Last Modified:10 Nov 2021 22:15

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