Journal Article

Constraints on sterile neutrino dark matter from <i>XMM-Newton</i> observations of M33

E. Borriello, M. Paolillo, G. Miele, G. Longo and R. Owen

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 425, issue 3, pages 1628-1632
Published in print September 2012 | ISSN: 0035-8711
Published online September 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21498.x
Constraints on sterile neutrino dark matter from XMM-Newton observations of M33

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Abstract

Using archival XMM–Newton observations of the diffuse and unresolved components’ emission in the inner disc of M33, we exclude the possible contribution from narrow line emission in the energy range 0.5–5 keV more intense than 10−6–10−5 erg s−1. Under the hypothesis that sterile neutrinos constitute the majority of the dark matter in M33, we use this result in order to put constraints on their parameter space in the 1–10 keV mass range.

Keywords: astroparticle physics; line: identification; neutrinos; X-rays: galaxies

Journal Article.  3183 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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