21-25 March 2022
Salon de actos del IATA
Europe/Madrid timezone

Dark Matter search in dwarf irregular galaxies with Fermi -LAT

24 Mar 2022, 17:49
Salón de Actos del IATA

Salón de Actos del IATA


Mrs. Viviana Gammaldi (DFT & IFT UAM)


In these talk we highlight the main results about dark matter (DM) search in dwarf irregular galaxies with the Fermi Large Area Telescope. We analyze 11 years of Fermi-LAT data corresponding to the sky regions of 7 dwarf irregular (dIrr) galaxies. DIrrs are DM dominated systems, recently proposed as interesting targets for the indirect search of DM with gamma-rays. We create a spatial template of the expected DM-induced gamma-ray signal with the CLUMPY code, to be used in the analysis of Fermi-LAT data. No significant emission is detected from any of the targets in our sample. Thus, we compute the upper limits on the DM annihilation cross-section versus mass parameter space. The strongest constraints are obtained for 𝑏𝑏 ̄ and are at the level of ⟨𝜎𝑣⟩ ∼ 7 × 10−26cm3s−1 at 𝑚𝜒 ∼ 6 GeV.

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