Can proper motions of dark-matter subhalos be detected?
نویسندگان
چکیده
منابع مشابه
Can proper motions of dark-matter subhalos be detected?
One of the goals of NASA’s Fermi Gamma-ray Space Telescope (formerly GLAST) will be the detection of gamma rays from dark-matter annihilation in the Galactic halo. Theoretical arguments suggest that dark matter may be bound into subhalos with masses as small as 10 –10M . If so, it may be possible to detect individual subhalos as point sources in the Fermi Telescope. It has further been argued t...
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We use high-resolution numerical simulations to study the physical properties of subhalos when they merge into their host halos. An improved algorithm is used to identify the subhalos. We then examine their spatial and velocity distributions in spherical and triaxial halo models. We find that the massive subhalos are more preferentially accreted along the major axis of the host halo than the lo...
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While the PAMELA collaboration has recently confirmed the cosmic ray positron excess, it is interesting to review the effects of dark matter (DM) subhalos on the predicted antimatter signals. We recall that, according to general subhalo properties as inferred from theoretical cosmology, and for DM with constant annihilation cross section, the enhancement cannot be & 20 for the antimatter yield....
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.78.101301