A search for dark matter in Triangulum II with the MAGIC telescopes
Journal
Date Issued
2020
Author(s)
Acciari, V. A.
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Ansoldi, S.
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Arbet Engels, A.
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Baack, D.
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Babić, A.
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Banerjee, B.
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Barres de Almeida, U.
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Barrio, J. A.
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Becerra González, J.
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Bednarek, W.
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Chilingarian, A.
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Cikota, S.
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Colak, S. M.
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Colin, U.
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Colombo, E.
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Contreras, J. L.
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Cortina, J.
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D'Elia, V.
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da Vela, P.
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Mannheim, K.
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de Angelis, A.
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de Lotto, B.
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Delfino, M.
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Delgado, J.
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Depaoli, D.
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di Pierro, F.
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di Venere, L.
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Do Souto Espiñeira, E.
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Dominis Prester, D.
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Maraschi, L.
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Donini, A.
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Dorner, D.
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Doro, M.
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Elsaesser, D.
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Fallah Ramazani, V.
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Fattorini, A.
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Ferrara, G.
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Fidalgo, D.
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Foffano, L.
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Fonseca, M. V.
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Mariotti, M.
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Font, L.
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Fruck, C.
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Fukami, S.
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García López, R. J.
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Garczarczyk, M.
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Gasparyan, S.
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Gaug, M.
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Giglietto, N.
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Giordano, F.
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Gliwny, P.
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Martínez, M.
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Godinović, N.
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Green, D.
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Guberman, D.
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Hadasch, D.
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Hahn, A.
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Herrera, J.
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Hoang, J.
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Hrupec, D.
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Hütten, M.
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Mazin, D.
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Inada, T.
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Inoue, S.
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Ishio, K.
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Iwamura, Y.
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Jouvin, L.
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Kerszberg, D.
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Kubo, H.
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Kushida, J.
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Lelas, D.
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Mićanović, S.
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Lindfors, E.
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Longo, F.
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López, M.
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López-Coto, R.
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López-Oramas, A.
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Loporchio, S.
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Machado de Oliveira Fraga, B.
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Maggio, C.
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Miceli, D.
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Majumdar, P.
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Makariev, M.
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Mallamaci, M.
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Maneva, G.
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Manganaro, M.
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Miener, T.
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Minev, M.
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Miranda, J. M.
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Bellizzi, L.
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Mirzoyan, R.
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Molina, E.
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Moralejo, A.
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Morcuende, D.
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Moreno, V.
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Moretti, E.
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Munar-Adrover, P.
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Neustroev, V.
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Nigro, C.
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Nilsson, K.
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Bernardini, E.
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Ninci, D.
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Nishijima, K.
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Noda, K.
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Nogués, L.
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Nozaki, S.
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Palacio, J.
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Palatiello, M.
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Paneque, D.
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Paoletti, R.
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Berti, A.
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Paredes, J. M.
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Peñil, P.
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Peresano, M.
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Prada Moroni, P. G.
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Puljak, I.
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Rhode, W.
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Ribó, M.
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Rico, J.
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Besenrieder, J.
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Rugliancich, A.
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Saha, L.
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Sahakyan, N.
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Saito, T.
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Sakurai, S.
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Satalecka, K.
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Schmidt, K.
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Schweizer, T.
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Bhattacharyya, W.
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Sitarek, J.
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Šnidarić, I.
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Sobczynska, D.
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Somero, A.
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Strom, D.
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Suda, Y.
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Surić, T.
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Takahashi, M.
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•
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Temnikov, P.
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Terzić, T.
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Teshima, M.
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Torres-Albà, N.
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Tosti, L.
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Vagelli, V.
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van Scherpenberg, J.
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Vanzo, G.
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Vazquez Acosta, M.
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Vigorito, C. F.
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Biland, A.
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Vitale, V.
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Vovk, I.
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Will, M.
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Zarić, D.
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MAGIC Collaboration
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Blanch, O.
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Bošnjak, Ž.
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Busetto, G.
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Carosi, R.
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Ceribella, G.
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Chai, Y.
Abstract
We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 h of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J-factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J-factor for Triangulum II for WIMP dark matter of log [Jann(0 . 5 °) ∕GeV2cm-5 ] = 19 . 35 ± 0 . 37 . We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the msubsup> τ-τ+ final state, where a cross section for annihilation down to «σann v » = 3 . 05 × 10-24 cm3 s-1 is excluded.
Volume
28
Start page
100529
Issn Identifier
2212-6864
Ads BibCode
2020PDU....2800529A
Rights
open.access
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