DWARF GALAXY ANNIHILATION AND DECAY EMISSION PROFILES FOR DARK MATTER EXPERIMENTS

By A. Geringer-Sameth, S. Koushiappas, M. Walker. 2014

189 citations recorded by the source corpus.

Gamma-ray searches for dark matter annihilation and decay in dwarf galaxies rely on an understanding of the dark matter density profiles of these systems. Conversely, uncertainties in these density profiles propagate into the derived particle physics limits as systematic errors. In this paper we quantify the expected dark matter signal from 20 Milky Way dwarfs using a uniform analysis of the most recent stellar-kinematic data available. Assuming that the observed stellar populations are equilibrium tracers of spherically symmetric gravitational potentials that are dominated by dark matter, we find that current stellar-kinematic data can predict the amplitudes of annihilation signals to within a factor of a few for the ultra-faint dwarfs of greatest interest. On the other hand, the expected signal from several classical dwarfs (with high-quality observations of large numbers of member stars) can be localized to the ∼20% level. These results are important for designing maximally sensitive searches in current and future experiments using space and ground-based instruments.

Subfields: Instrumentation, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/91040e0ba3fec1b5d2390ffc1dc18b3e4e0e473b

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Citations in the corpus

SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI-LAT (2016, methodology): “…on DM annihilation that are competitive with other DM targets such as the Galactic center (e.g., Abdo et al. 2010; Ackermann et al. 2011; Geringer-Sameth & Koushiappas 2011; Mazziotta et al. 2012; Ackermann et al. 2014; Geringer-Sameth et al. 2015b,c; Hooper & Linden 2015; Li et al. 2016).”
Farthest Neighbor: The Distant Milky Way Satellite Eridanus II (2016, methodology): “(e.g., Strigari et al. 2008; Essig et al. 2009; Charbonnier et al. 2011; Martinez 2015; Geringer-Sameth et al. 2015).”
SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI-LAT DATA (2015, methodology): “We obtain a similar best-fit value, Jlog 18.1 0.110( ) = at d 100 kpc= , using the J-factors derived by Geringer-Sameth et al. (2015a), who assumed a generalized NFW profile and omitted Willman 1.75 We note that the limited scatter in Figure 3 is primarily due to the known dSphs residing in…”
Dark matter annihilation and decay in dwarf spheroidal galaxies: the classical and ultrafaint dSphs (2015, background): “…the DES survey (DES Collaboration et al. 2015; Koposov et al. 2015) and already searched for in Fermi-LAT data (Fermi-LAT Collaboration et al. 2015; Geringer-Sameth et al. 2015) call for a continued effort on c© Xxxx RAS, MNRAS 000, 1–18 this topic (see also Laevens et al. 2015; Martin et al.…”
MadDM v.3.0: A comprehensive tool for dark matter studies (2018, methodology): “We use the J factors provided by the collaboration (adopted from [75]) which are based on spectroscopic observations when possible and distance scaling relationships otherwise.”
The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2 (2018, background): “…to the expected signal to noise in quadrature as SNR2 =∑ s2/b, where the sum runs over energy and spatial bins, and s and b are the expected number of dark matter photons and background events detected in each (generally infinitesimal) bin (see equation 18 of Geringer-Sameth et al. 2015a).”