SEARCHING FOR keV STERILE NEUTRINO DARK MATTER WITH X-RAY MICROCALORIMETER SOUNDING ROCKETS
Name
Figueroa-Feliciano-2015-Searching for keV st.pdf
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Author(s)
Rutherford, J.
Eckart, M. E.
Kelley, R. L.
Kilbourne, C. A.
McCammon, D.
Morgan, K.
Porter, F. S.
Szymkowiak, A. E.
Figueroa-Feliciano, Enectali
Castro, Daniel
Date Issued
November 2015
Journal
The Astrophysical Journal
Publisher
IOP Publishing
Citation
Figueroa-Feliciano, E., A. J. Anderson, D. Castro, D. C. Goldfinger, J. Rutherford, M. E. Eckart, R. L. Kelley, et al. “SEARCHING FOR keV STERILE NEUTRINO DARK MATTER WITH X-RAY MICROCALORIMETER SOUNDING ROCKETS.” The Astrophysical Journal 814, no. 1 (November 18, 2015): 82. © 2015 The American Astronomical Society
Version
Final published version
Abstract
High-resolution X-ray spectrometers onboard suborbital sounding rockets can search for dark matter candidates that produce X-ray lines, such as decaying keV-scale sterile neutrinos. Even with exposure times and effective areas far smaller than XMM-Newton and Chandra observations, high-resolution, wide field of view observations with sounding rockets have competitive sensitivity to decaying sterile neutrinos. We analyze a subset of the 2011 observation by the X-ray Quantum Calorimeter instrument centered on Galactic coordinates l = 165°, b = -5° with an effective exposure of 106 s, obtaining a limit on the sterile neutrino mixing angle of sin[superscript 2] 2ϴ < 7.2 x 10[superscript -10] at 95% CL for a 7 keV neutrino. Better sensitivity at the level of sin[superscript 2] 2ϴ ~ 2.1 x 10[superscript -10] at 95% CL for a 7 keV neutrino is achievable with future 300-s observations of the galactic center by the Micro-X instrument, providing a definitive test of the sterile neutrino interpretation of the reported 3.56 keV excess from galaxy clusters.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1088/0004-637X/814/1/82
