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Title: Constraints on dark matter models from the observation of Triangulum-II with the Fermi Large Area Telescope
Authors: Biswas, Sayan
Bhattacharjee, P
Majumdar, P
Das, Subinoy
Mousumi Das
Joarder, P. S
Issue Date: Nov-2017
Publisher: IOP Publishing
Citation: Journal of Cosmology and Astroparticle Physics, Vol. 2017, No. 11, 3
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.
Description: Restricted Access
ISSN: 1475-7516
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Appears in Collections:IIAP Publications

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