A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
A search for dark matter in Triangulum II with the MAGIC telescopes
Tekijät: Acciari V.A., Ansoldi S., Antonelli L.A., Arbet Engels A., Baack D., Babić A., Banerjee B., Barres de Almeida U., Barrio J.A., Becerra González J., Bednarek W., Bellizzi L., Bernardini E., Berti A., Besenrieder J., Bhattacharyya W., Bigongiari C., Biland A., Blanch O., Bonnoli G., Bošnjak , Busetto G., Carosi R., Ceribella G., Chai Y., Chilingarian A., Cikota S., Colak S.M., Colin U., Colombo E., Contreras J.L., Cortina J., Covino S., D'Elia V., Da Vela P., Dazzi F., De Angelis A., De Lotto B., Delfino M., Delgado J., Depaoli D., Di Pierro F., Di Venere L., Do Souto Espiñeira E., Dominis Prester D., Donini A., Dorner D., Doro M., Elsaesser D., Fallah Ramazani V., Fattorini A., Ferrara G., Fidalgo D., Foffano L., Fonseca M.V., Font L., Fruck C., Fukami S., García López R.J., Garczarczyk M., Gasparyan S., Gaug M., Giglietto N., Giordano F., Gliwny P., Godinović N., Green D., Green J.G., Guberman D., Hadasch D., Hahn A., Herrera J., Hoang J., Hrupec D., Hütten M., Inada T., Inoue S., Ishio K., Iwamura Y., Jouvin L., Kerszberg D., Kubo H., Kushida J., Lamastra A., Lelas D., Leone F., Lindfors E., Lombardi S., Longo F., López M., López-Coto R., López-Oramas A., Loporchio S., Machado de Oliveira Fraga B., Maggio C., Majumdar P., Makariev M., Mallamaci M., Maneva G., Manganaro M., Mannheim K., Maraschi L., Mariotti M., Martínez M., Mazin D., Mićanović S., Miceli D., Miener T., Minev M., Miranda J.M., Mirzoyan R., Molina E., Moralejo A., Morcuende D., Moreno V., Moretti E., Munar-Adrover P., Neustroev V., Nigro C., Nilsson K., Ninci D., Nishijima K., Noda K., Nogués L., Nozaki S., Paiano S., Palacio J., Palatiello M., Paneque D., Paoletti R., Paredes J.M., Peñil P., Peresano M., Persic M., Prada Moroni P.G., Prandini E., Puljak I., Rhode W., Ribó M., Rico J., Righi C., Rugliancich A., Saha L., Sahakyan N., Saito T., Sakurai S., Satalecka K., Saturni F.G., Schmidt K., Schweizer T., Sitarek J., Šnidarić I., Sobczynska D., Somero A., Stamerra A., Strom D., Suda Y., Surić T., Takahashi M., Tavecchio F., Temnikov P., Terzić T., Teshima M., Torres-Albà N., Tosti L., Vagelli V., van Scherpenberg J., Vanzo G., Vazquez Acosta M., Vigorito C.F., Vitale V., Vovk I., Will M., Zarić D., Acciari V.A., Ansoldi S., Will M., Zarić D.
Kustantaja: Elsevier B.V.
Julkaisuvuosi: 2020
Journal: Physics of the Dark Universe
Tietokannassa oleva lehden nimi: Physics of the Dark Universe
Vuosikerta: 28
Sivujen määrä: 9
ISSN: 2212-6864
eISSN: 2212-6864
DOI: https://doi.org/10.1016/j.dark.2020.100529
We present the first results from very-high-energy observations of the dwarf spheroidal satellitecandidate 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 annihilationJ-factorand 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 τ−τ+ final state, where a cross section for annihilation down to ⟨σannv⟩=3.05×10−24cm3s−1 is excluded.
