Search for Warm Dark Matter with Chandra Observations of Dwarf Spheroidal Galaxies

Details Search for Warm Dark Matter with Chandra Observations of Dwarf Spheroidal Galaxies Search for Warm Dark Matter with Chandra Observations of Dwarf Spheroidal Galaxies

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2676l&link_type=abstract

Chandra proposal ID #10610698

Physics

Scientific paper

The keV sterile neutrino is a dark matter (DM) candidate that may explain pulsar kicks and assist primordial star formation. Their radiative decay produces a photon amenable to X-ray study, and dwarf spheroidal galaxies are ideal targets because of their proximity, high DM density, and absence of additional X-ray sources. We propose Chandra observations of Willman 1 and Ursa Minor to complement our Suzaku program. Willman 1 is one of the faint, DM-dominated dwarf spheroidals newly discovered by the SDSS; none are observed in X-rays. Constraints based on these data enter a significant new regime: non-detections are still of great importance. In the best case, the long sought-after identity of DM will be discovered, pointing the way to physics beyond the Standard Model.

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