Dark Matter Line Emission Constraints from NuSTAR Observations of the Bullet Cluster

Journal
Date Issued
2015
Author(s)
Riemer-Sørensen, S.
•
Wik, D.
•
Madejski, G.
•
•
•
Harrison, F. A.
•
Craig, W. W.
•
Hailey, C. J.
•
Boggs, S. E.
•
Christensen, F. E.
•
Stern, D.
•
Zhang, W. W.
•
Hornstrup, A.
DOI
Description
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
Abstract
Some dark matter candidates, e.g., sterile neutrinos, provide observable signatures in the form of mono-energetic line emission. We present the first search for dark matter line emission in the 3-80 {keV} 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 3.5 {keV}, but improves on the constraints for energies of 10-25 {keV}.
Volume
810
Issue
1
Start page
48
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2015ApJ...810...48R
Rights
open.access
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