Aachen 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 79: Dunkle Materie und Kollider II
T 79.1: Vortrag
Donnerstag, 28. März 2019, 16:00–16:15, H09
Constraining dark matter signal from a combined analysis of VERITAS, MAGIC, HESS, HAWC and Fermi-LAT observations of dwarf spheroidal galaxies — •Chiara Giuri — Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany
Dwarf spheroidal galaxies (dSphs) are the most dark matter (DM) dominated objects observed so far, indeed they are believed to contain up to O(103) times more mass in dark matter than in visible matter. Moreover, they are very close by (15 - 250 kpc), with an extremely large mass to light ratio and no other known sources of gamma-ray emission. For these reasons, indirect dark matter searches with dSphs as observation targets have been increasingly developed by many different observatories during the past decade. Within the context of the Λ-Cold Dark Matter (ΛCDM) paradigm, a candidate for DM is the so-called weakly interacting massive particle (WIMP), formed in the early Universe, with a mass range between 10 GeV to higher than 10 TeV. Such particles can decay or annihilate into Standard Model particles, including very-high-energy (E>100 GeV) gamma-rays. In this context, we show our progress towards a joint binned likelihood analysis of 11 dwarf spheroidal galaxies by combining VERITAS, MAGIC, HESS, HAWC and Fermi-LAT. Our goal is to improve the limits on the annihiliation cross-section for dark matter particles by combining multiple datasets.