Dark Matter Search Using XMM-Newton Observations of Willman 1
arXiv:1203.5229 · doi:10.1088/0004-637X/751/2/82
Abstract
We report the results of a search for an emission line from radiatively decaying dark matter in the ultra-faint dwarf spheroidal galaxy Willman 1 based on analysis of spectra extracted from XMM-Newton X-ray Observatory data. The observation follows up our analysis of Chandra data of Willman 1 that resulted in line flux upper limits over the Chandra bandpass and evidence of a 2.5 keV feature at a significance below the 99% confidence threshold used to define the limits. The higher effective area of the XMM-Newton detectors, combined with application of recently developing methods for extended-source analysis, allow us to derive improved constraints on the combination of mass and mixing angle of the sterile neutrino dark matter candidate. We do not confirm the Chandra evidence for a 2.5 keV emission line.
23 pages, including 17 figures; accepted for publication in ApJ
References in corpus (19)
- The Observed properties of Dark Matter on small spatial scales
- A Catalog of Galaxy Clusters Observed by XMM-Newton
- Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
- Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
- Opening a new window for warm dark matter
- Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
- The Most Dark Matter Dominated Galaxies: Predicted Gamma-ray Signals from the Faintest Milky Way Dwarfs
- Strong Upper Limits on Sterile Neutrino Warm Dark Matter
- Constraining Sterile Neutrino Warm Dark Matter with Chandra Observations of the Andromeda Galaxy
- Searching for dark matter in X-rays: how not to check the dark matter origin of a spectral feature
- Clustering properties of a sterile neutrino dark matter candidate
- Galaxy Formation in WDM Cosmology
- Small-scale structure formation properties of chilled sterile neutrinos as dark matter
- Small scale aspects of warm dark matter : power spectra and acoustic oscillations
- Searching for dark matter sterile neutrino in laboratory
- An XMM-Newton spatially-resolved study of metal abundance evolution in distant galaxy clusters
- Coherent Active-Sterile Neutrino Flavor Transformation in the Early Universe
- Delayed pulsar kicks from the emission of sterile neutrinos
- Reionization in the Warm Dark Matter Model
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- Galactic Searches for Dark Matter
- Sterile neutrinos in cosmology
- Checking the dark matter origin of 3.53 keV line with the Milky Way center
- Constraints on 3.55 keV line emission from stacked observations of dwarf spheroidal galaxies
- keV Neutrino Model Building
- Astrophysical constraints on resonantly produced sterile neutrino dark matter
- Next decade of sterile neutrino studies
- Updated CMB, X- and gamma-ray constraints on majoron dark matter
- Diluted equilibrium sterile neutrino dark matter
- An X-ray Spectroscopic Search for Dark Matter in the Perseus Cluster with Suzaku
- Improved Limits on Sterile Neutrino Dark Matter using Full-Sky Fermi Gamma-Ray Burst Monitor Data
- Big Bang Nucleosynthesis constraints on sterile neutrino and lepton asymmetry of the Universe
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- Moduli dark matter and the search for its decay line using Suzaku X-ray telescope
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- Structure formation in a mixed dark matter model with decaying sterile neutrino: the 3.5 keV X-ray line and the Galactic substructure
- Why three generations?
- Longevity Problem of Sterile Neutrino Dark Matter
- Electron events from the scattering with solar neutrinos in the search of keV scale sterile neutrino dark matter
- A sensitive search for unknown spectral emission lines in the diffuse X-ray background with XMM-Newton
- XMM-Newton study of X-ray sources in the field of Willman 1 dwarf spheroidal galaxy
- Potential of LOFT telescope for the search of dark matter
- Willman 1 Revisited: The Kinematics, Chemistry, and Orbital Properties of a Potentially-Disrupting Dwarf Galaxy