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

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.

doi:10.1088/0004-637X/810/1/48

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

Journal Article · Thu Aug 27 00:00:00 EDT 2015 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/810/1/48· OSTI ID:1326854

Riemer-Sørensen, S. ^[1]; Wik, D. ^[2]; Madejski, G. ^[3]; Molendi, S. ^[4]; Gastaldello, F. ^[4]; Harrison, F. A. ^[5]; Craig, W. W. ^[6]; Hailey, C. J. ^[7]; Boggs, S. E. ^[8]; Christensen, F. E. ^[9]; Stern, D. ^[5]; Zhang, W. W. ^[2]; Hornstrup, A. ^[9]

Univ. of Oslo, Oslo (Norway)
NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
INAF, IASF Milano, Milano (Italy)
California Inst. of Technology (CalTech), Pasadena, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Columbia Univ., New York, NY (United States)
Univ. of California, Berkeley, CA (United States)
Technical Univ. of Denmark, Lyngby (Denmark)

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 $$10-25\;\mathrm{keV}$$.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1326854

Alternate ID(s):: OSTI ID: 22882727

Report Number(s):: SLAC-PUB--16711

Journal Information:: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 1 Vol. 810; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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