Wino Dark Matter and Future dSph Observations

Autor:	Bhattacherjee, Biplob, Ibe, Masahiro, Ichikawa, Koji, Matsumoto, Shigeki, Nishiyama, Kohei
Rok vydání:	2014
Předmět:	High Energy Physics - Phenomenology Astrophysics - High Energy Astrophysical Phenomena
Zdroj:	JHEP 1407 (2014) 080
Druh dokumentu:	Working Paper
DOI:	10.1007/JHEP07(2014)080
Popis:	We discuss the indirect detection of the wino dark matter utilizing gamma-ray observations of dwarf spheroidal galaxies (dSphs). After carefully reviewing current limits with particular attention to astrophysical uncertainties, we show prospects of the wino mass limit in future gamma-ray observation by the Fermi-LAT and the GAMMA-400 telescopes. We find that the improvement of the so-called $J$-factor of both the classical and the ultra-faint dSphs will play a crucial role to cover whole mass range of the wino dark matter. For example, with $\delta (\log_{10}J) = 0.1$ for both the classical and the ultra-faint dSphs, whole wino dark matter mass range can be covered by 15 years and 10 years data at the Fermi-LAT and GAMMA-400 telescopes, respectively. Comment: 32 pages, 13 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1405.4914 Zobrazit plný text záznamu View this record from Arxiv