Unidentified line in X-ray spectra of the andromeda galaxy and perseus galaxy cluster
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Unidentified line in X-ray spectra of the andromeda galaxy and perseus galaxy cluster. / Boyarsky, A.; Ruchayskiy, O.; Iakubovskyi, D.; Franse, J.
I: Physical Review Letters, Bind 113, Nr. 25, 251301, 15.12.2014.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Unidentified line in X-ray spectra of the andromeda galaxy and perseus galaxy cluster
AU - Boyarsky, A.
AU - Ruchayskiy, O.
AU - Iakubovskyi, D.
AU - Franse, J.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - We report a weak line at 3.52±0.02keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p-n (PN) CCD cameras of the XMM-Newton telescope. This line is not known as an atomic line in the spectra of galaxies or clusters. It becomes stronger towards the centers of the objects; is stronger for Perseus than for M31; is absent in the spectrum of a deep "blank sky" data set. Although for each object it is hard to exclude that the feature is due to an instrumental effect or an atomic line, it is consistent with the behavior of a dark matter decay line. Future (non-)detections of this line in multiple objects may help to reveal its nature.
AB - We report a weak line at 3.52±0.02keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p-n (PN) CCD cameras of the XMM-Newton telescope. This line is not known as an atomic line in the spectra of galaxies or clusters. It becomes stronger towards the centers of the objects; is stronger for Perseus than for M31; is absent in the spectrum of a deep "blank sky" data set. Although for each object it is hard to exclude that the feature is due to an instrumental effect or an atomic line, it is consistent with the behavior of a dark matter decay line. Future (non-)detections of this line in multiple objects may help to reveal its nature.
UR - http://www.scopus.com/inward/record.url?scp=84919724940&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.113.251301
DO - 10.1103/PhysRevLett.113.251301
M3 - Journal article
AN - SCOPUS:84919724940
VL - 113
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 251301
ER -
ID: 229313099