scholarly journals Self-consistent phase-space distribution function for the anisotropic dark matter halo of the Milky Way

2014 ◽  
Vol 89 (6) ◽  
Author(s):  
Mattia Fornasa ◽  
Anne M. Green
Keyword(s):  
Dark Matter ◽  
Distribution Function ◽  
Phase Space ◽  
Milky Way ◽  
Space Distribution ◽  
Dark Matter Halo ◽  
Phase Space Distribution ◽  
Self Consistent

scholarly journals Frequency maps as a probe of secular evolution in the Milky Way

2012 ◽  
Vol 10 (H16) ◽  
pp. 349-349
Author(s):  
Monica Valluri
Keyword(s):  
Dark Matter ◽  
Distribution Function ◽  
Phase Space ◽  
Milky Way ◽  
Space Distribution ◽  
Compact Representation ◽  
Phase Space Distribution ◽  
Secular Evolution ◽  
Halo Stars ◽  
Stellar Halo

AbstractThe frequency analysis of the orbits of halo stars and dark matter particles from a cosmological hydrodynamical simulation of a disk galaxy from the MUGS collaboration (Stinson et al. 2010) shows that even if the shape of the dark matter halo is nearly oblate, only about 50% of its orbits are on short-axis tubes, confirming a previous result: under baryonic condensation all orbit families can deform their shapes without changing orbital type (Valluri et al. 2010). Orbits of dark matter particles and halo stars are very similar reflecting their common accretion origin and the influence of baryons. Frequency maps provide a compact representation of the 6-D phase space distribution that also reveals the history of the halo (Valluri et al. 2012). The 6-D phase space coordinates for a large population of halo stars in the Milky Way that will be obtained from future surveys can be used to reconstruct the phase-space distribution function of the stellar halo. The similarity between the frequency maps of halo stars and dark matter particles (Fig. 1) implies that reconstruction of the stellar halo distribution function can reveal the phase space distribution of the unseen dark matter particles and provide evidence for secular evolution. MV is supported by NSF grant AST-0908346 and the Elizabeth Crosby grant.

scholarly journals Observationally inferred dark matter phase-space distribution and direct detection experiments

2019 ◽  
Vol 100 (2) ◽  
Author(s):  
Sayan Mandal ◽  
Subhabrata Majumdar ◽  
Vikram Rentala ◽  
Ritoban Basu Thakur
Keyword(s):  
Dark Matter ◽  
Phase Space ◽  
Direct Detection ◽  
Space Distribution ◽  
Phase Space Distribution ◽  
Matter Phase

scholarly journals Halo uncertainties in electron recoil events at direct detection experiments

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
Tarak Nath Maity ◽  
Tirtha Sankar Ray ◽  
Sambo Sarkar
Keyword(s):  
Dark Matter ◽  
Phase Space ◽  
Direct Detection ◽  
Space Distribution ◽  
Semiconductor Detectors ◽  
Detection Rates ◽  
Phase Space Distribution ◽  
Electron Recoil ◽  
Highly Correlated ◽  
The Impact

AbstractThe dark matter direct detection rates are highly correlated with the phase space distribution of dark matter particles in our galactic neighbourhood. In this paper we make a systematic study of the impact of astrophysical uncertainties on electron recoil events at the direct detection experiments with Xenon and semiconductor detectors. We find that within the standard halo model there can be up to $$ \sim 50\%$$ ∼ 50 % deviation from the fiducial choice in the exclusion bounds from these observational uncertainties. For non-standard halo models we report a similar deviation from the fiducial standard halo model when fitted with recent cosmological N-body simulations while even larger deviations are obtained in case of the observational uncertainties.

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