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Triangulum-II, a newly discovered dwarf spheroidal galaxy, is a strongcandidate for the indirect search of dark matter through the detection of$\gamma$-ray emission that could originate from the pair- annihilation ofweakly interacting massive particles (WIMPs). We here report on the analysis ofalmost seven years Fermi Gamma-Ray Space Telescope data of Triangulum-II whichwas taken during its all sky survey operation mode. No excess $\gamma$-rayemission has been detected above 100 MeV from Triangulum-II. We derive theupper limits on $\gamma$-ray flux assuming both the power-law spectra and thespectra related to WIMP annihilation. In this work, we have considered severaltheoretical WIMP (neutralinos here) models envisioning both thermal andnon-thermal production of WIMPs, and put limits on pair-annihilationcross-section of WIMPs to constrain the parameter space related to thosetheoretical models.

Constraints on dark matter models from the observation of Triangulum-II with the Fermi Large Area Telescope