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Title: Dark matter line emission constraints from NuSTAR observations of the bullet cluster

Abstract

Some dark matter candidates, e.g., sterile neutrinos, provide observable signatures in the form of mono-energetic line emission. Here, we present the first search for dark matter line emission in the $$3-80\;\mathrm{keV}$$ 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 $$3.5\;\mathrm{keV}$$, but improves on the constraints for energies of $$10-25\;\mathrm{keV}$$.

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [6];  [7];  [8];  [9];  [5];  [2];  [9]
  1. Univ. of Oslo, Oslo (Norway)
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. INAF, IASF Milano, Milano (Italy)
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  6. Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. Columbia Univ., New York, NY (United States)
  8. Univ. of California, Berkeley, CA (United States)
  9. Technical Univ. of Denmark, Lyngby (Denmark)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1326854
Report Number(s):
SLAC-PUB-16711
Journal ID: ISSN 1538-4357
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 810; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; dark matter; line: identification; X-rays: galaxies: clusters

Citation Formats

Riemer-Sørensen, S., Wik, D., Madejski, G., Molendi, S., Gastaldello, F., Harrison, F. A., Craig, W. W., Hailey, C. J., Boggs, S. E., Christensen, F. E., Stern, D., Zhang, W. W., and Hornstrup, A. Dark matter line emission constraints from NuSTAR observations of the bullet cluster. United States: N. p., 2015. Web. doi:10.1088/0004-637X/810/1/48.
Riemer-Sørensen, S., Wik, D., Madejski, G., Molendi, S., Gastaldello, F., Harrison, F. A., Craig, W. W., Hailey, C. J., Boggs, S. E., Christensen, F. E., Stern, D., Zhang, W. W., & Hornstrup, A. Dark matter line emission constraints from NuSTAR observations of the bullet cluster. United States. doi:10.1088/0004-637X/810/1/48.
Riemer-Sørensen, S., Wik, D., Madejski, G., Molendi, S., Gastaldello, F., Harrison, F. A., Craig, W. W., Hailey, C. J., Boggs, S. E., Christensen, F. E., Stern, D., Zhang, W. W., and Hornstrup, A. Thu . "Dark matter line emission constraints from NuSTAR observations of the bullet cluster". United States. doi:10.1088/0004-637X/810/1/48. https://www.osti.gov/servlets/purl/1326854.
@article{osti_1326854,
title = {Dark matter line emission constraints from NuSTAR observations of the bullet cluster},
author = {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.},
abstractNote = {Some dark matter candidates, e.g., sterile neutrinos, provide observable signatures in the form of mono-energetic line emission. Here, we present the first search for dark matter line emission in the $3-80\;\mathrm{keV}$ 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 $3.5\;\mathrm{keV}$, but improves on the constraints for energies of $10-25\;\mathrm{keV}$.},
doi = {10.1088/0004-637X/810/1/48},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 810,
place = {United States},
year = {2015},
month = {8}
}

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    Works referencing / citing this record:

    Observation of the new emission line at ~3.5 keV in X-ray spectra of galaxies and galaxy clusters
    journal, January 2016