Title:	Constraints on dark matter models from the observation of Triangulum-II with the Fermi large area Telescope.
Authors:	Biswas, Sayan Bhattacharjee, Pooja Majumdar, Pratik Das, Subinoy Das, Mousumi Joarder, Partha S
Keywords:	dark matter theory dwarks galaxies gamma ray experiments
Issue Date:	Nov-2017
Publisher:	IOP Publishing and SISSA
Citation:	Journal of Cosmology and Astroparticle Physics, 2017, Vol.11, p003
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. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/6824
ISSN:	1475-7516 (Online)
Alternative Location:	http://adsabs.harvard.edu/abs/2017JCAP...11..003B http://arxiv.org/abs/1705.00426 http://dx.doi.org/10.1088/1475-7516/2017/11/003
Copyright:	2017 IOP Publishing and SISSA
Appears in Collections:	Research Papers (A&A)

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