Abstract:
Triangulum-II, a newly discovered dwarf spheroidal galaxy, is a strong candidate
for the indirect search of dark matter through the detection of
γ
-ray emission that could
originate from the pair- annihilation of weakly interacting massive particles (WIMPs). We
here report on the analysis of almost seven years Fermi Gamma-Ray Space Telescope data
of Triangulum-II which was taken during its all sky survey operation mode. No excess
γ
-
ray emission has been detected above 100 MeV from Triangulum-II. We derive the upper
limits on
γ
-ray flux assuming both the power-law spectra and the spectra related to WIMP
annihilation. In this work, we have considered several theoretical WIMP (neutralinos here)
models envisioning both thermal and non-thermal production of WIMPs, and put limits on
pair-annihilation cross section of WIMPs to constrain the parameter space related to those
theoretical models.
