Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-01-16
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
4 pages, 6 figures, matches accepted version
Scientific paper
Context. The sterile neutrino is an excellent dark matter candidate, which can be searched for in a wide range of astrophysical sites. It has previously been shown that the optimal search strategy is to consider dwarf galaxies belonging to the Milky Way. Aims. We search for line emission from decaying dark matter. Methods. We analyse publicly available Chandra X-ray observations of the dwarf galaxy Draco. Results. The Draco and blank sky (background) spectra are nearly identical in shape, which allows us to conclude: i) Dwarf spheroidals are ideal for studying dark matter X-ray emission since the baryonic noise is impressively low, ii) there is very little room for line emission, which leads to constraints in the mass-mixing angle parameter space of the sterile neutrino. We compare the standard flux derivation method to a very conservative rebinning approach. The resulting constraints are strongly dependent on the chosen method.
Hansen Steen H.
Riemer-Sorensen Signe
No associations
LandOfFree
Decaying dark matter in Draco does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Decaying dark matter in Draco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decaying dark matter in Draco will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-118735