%0 Generic %1 shah2016laboratory %A Shah, Chintan %A Dobrodey, Stepan %A Bernitt, Sven %A Steinbrügge, René %A López-Urrutia, José R. Crespo %A Gu, Liyi %A Kaastra, Jelle %D 2016 %K dark line matter xray %T Laboratory measurements compellingly support charge-exchange mechanism for the 'dark matter' $\sim$3.5 keV X-ray line %U http://arxiv.org/abs/1608.04751 %X The reported observations of an unidentified X-ray line feature at $\sim$3.5 keV have driven a lively discussion about its possible dark matter origin. Motivated by this, we have measured the K-shell X-ray spectra of highly ionized bare sulfur ions following charge exchange with gaseous molecules in an electron beam ion trap, as a source of or a contributor to this X-ray line. We produce $S^16+$ and $S^15+$ ions and let them capture electrons in collision with those molecules with the electron beam turned off while recording X-ray spectra. We observed a charge-exchanged-induced X-ray feature at the Lyman series limit (3.47 $\pm$ 0.06 keV). The inferred X-ray energy is in full agreement with the reported astrophysical observations and supports the novel scenario proposed by Gu and Kaastra (A & A 584, L11 (2015)).

@misc{shah2016laboratory, abstract = {The reported observations of an unidentified X-ray line feature at $\sim$3.5 keV have driven a lively discussion about its possible dark matter origin. Motivated by this, we have measured the \emph{K}-shell X-ray spectra of highly ionized bare sulfur ions following charge exchange with gaseous molecules in an electron beam ion trap, as a source of or a contributor to this X-ray line. We produce $\mathrm{S}^{16+}$ and $\mathrm{S}^{15+}$ ions and let them capture electrons in collision with those molecules with the electron beam turned off while recording X-ray spectra. We observed a charge-exchanged-induced X-ray feature at the Lyman series limit (3.47 $\pm$ 0.06 keV). The inferred X-ray energy is in full agreement with the reported astrophysical observations and supports the novel scenario proposed by Gu and Kaastra (A \& A \textbf{584}, {L11} (2015)).}, added-at = {2016-08-18T10:41:23.000+0200}, author = {Shah, Chintan and Dobrodey, Stepan and Bernitt, Sven and Steinbrügge, René and López-Urrutia, José R. Crespo and Gu, Liyi and Kaastra, Jelle}, biburl = {https://www.bibsonomy.org/bibtex/227842265a9b66a9a90eb32a0e8cdb3be/miki}, description = {[1608.04751] Laboratory measurements compellingly support charge-exchange mechanism for the 'dark matter' $\sim$3.5 keV X-ray line}, interhash = {4ad01be12690c77aa33c6e46f3b5c7cf}, intrahash = {27842265a9b66a9a90eb32a0e8cdb3be}, keywords = {dark line matter xray}, note = {cite arxiv:1608.04751Comment: 7 pages, 6 figures, accepted for publication in ApJ}, timestamp = {2016-08-18T10:41:23.000+0200}, title = {Laboratory measurements compellingly support charge-exchange mechanism for the 'dark matter' $\sim$3.5 keV X-ray line}, url = {http://arxiv.org/abs/1608.04751}, year = 2016 }