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arXiv · 1510.00358

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

Dmytro Iakubovskyi
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Abstract

The detection of an unidentified emission line in X-ray spectra of cosmic objects would be a 'smoking gun' signature for particle physics beyond the Standard Model. More than a decade of its extensive searches results in several narrow faint emission lines reported at 3.5, 8.7, 9.4 and 10.1 keV. The most promising of them is the emission line at ~3.5 keV reported in spectra of several nearby galaxies and galaxy clusters. Here I summarize its up-to-date status, overview its possible interpretations, including an intriguing connection with radiatively decaying dark matter, and outline future directions for its studies.

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Dmytro Iakubovskyi. 2016-07-07. Observation of the new emission line at ~3.5 keV in X-ray spectra of galaxies and galaxy clusters. https://doi.org/10.17721/2227-1481.6.3-15

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