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arXiv 1507.01378astro-ph.CO
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子弹星系团NuSTAR观测的暗物质谱线发射约束

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

S. Riemer-Sørensen, D. Wik, G. Madejski, S. Molendi, F. Gastaldello, F. A. Harrison, W. W. Craig, C. J. Hailey, S. E. Boggs, F. E. Christensen, D. Stern, W. W. Zhang, A. Hornstrup

摘要:

来自暗物质的谱线发射对于某些候选者(例如无菌中微子)来说是很好的动机。本文首次利用NuSTAR对子弹星系团进行了3- 80 keV能量范围内的暗物质谱线观测。我们没有检测到任何显着的线发射,而是我们推导出上限(95% CL)的通量,并解释这些约束的背景下,无菌中微子和更通用的暗物质候选人。NuSTAR不具有将最近声称的线检测限制在3.5keV的灵敏度,但改进了10- 25 keV能量的限制。

英文摘要:

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.

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