Search for Dark Matter Annihilation Signals from Unidentified Fermi-LAT Objects with H.E.S.S
| Title: | Search for Dark Matter Annihilation Signals from Unidentified Fermi-LAT Objects with H.E.S.S |
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| Authors: | H Abdalla; F Aharonian; F Ait Benkhali; EO Anguner; C Arcaro; C Armand; T Armstrong; H Ashkar; M Backes; V Baghmanyan; V Barbosa-Martins; A Barnacka; M Barnard; Y Becherini; D Berge; K Bernloehr; B Bi; M Bottcher; C Boisson; J Bolmont; M de Bony de Lavergne; M Breuhaus; R Brose; F Brun; T Bulik; T Bylund; F Cangemi; S Caroff; S Casanova; P Chambery; J Catalano; T Chand; A Chen; G Cotter; M Curylo; H Dalgleish; J Damascene Mbarubucyeye; ID Davids; J Davies; J Devin; A Djannati-Atai; A Dmytriiev; A Donath; V Doroshenko; L Dreyer; L du Plessis; C Duffy; K Egberts; S Einecke; G Emery; J-P Ernenwein; K Feijen; S Fegan; A Fiasson; G Fichet de Clairfontaine; G Fontaine; S Funk; M Fuessling; S Gabici; YA Gallant; S Ghafourizade; G Giavitto; L Giunti; D Glawion; JF Glicenstein; M-H Grondin; S Hattingh; M Haupt; G Hermann; JA Hinton; W Hofmann; C Hoischen; TL Holch; M Holler; M Horbe; D Horns; Z Huang; D Huber; M Jamrozy; D Jankowsky; F Jankowsky; V Joshi; I Jung-Richardt; E Kasai; K Katarzynski; U Katz; D Khangulyan; B Khelifi; S Klepser; W Kluzniak; Nu Komin; R Konno; K Kosack; D Kostunin; M Kreter; G Kukec Mezek; A Kundu; G Lamanna; S Le Stum; A Lemiere; M Lemoine-Goumard; J-P Lenain; F Leuschner; C Levy; A Luashvili; T Lohse; I Lypova; J Mackey; J Majumdar; D Malyshev; V Marandon; P Marchegiani; A Marcowith; A Mares; G Marti-Devesa; R Marx; G Maurin; PJ Meintjes; M Meyer; A Mitchell; R Moderski; L Mohrmann; A Montanari; C Moore; P Morris; E Moulin; J Muller; T Murach; K Nakashima; A Nayerhoda; M de Naurois; H Ndiyavala; J Niemiec; A Noel; L Oberholzer; P O'Brien; S Ohm; L Olivera-Nieto; E de Ona Wilhelmi; M Ostrowski; M Panter; S Panny; RD Parsons; G Peron; S Pita; V Poireau; DA Prokhorov; H Prokoph; G Puhlhoefer; M Punch; A Quirrenbach; P Reichherzer; A Reimer; O Reimer; Q Remy; M Renaud; F Rieger; C Romoli; G Rowell; B Rudak; H Rueda Ricarte; E Ruiz-Velasco; V Sahakian; S Sailer; H Salzmann; DA Sanchez; A Santangelo; M Sasaki; J Schaefer; F Schussler; HM Schutte; U Schwanke; M Senniappan; AS Seyffert; JNS Shapopi; K Shiningayamwe; R Simoni; A Sinha; H Spackman; H Sol; A Specovius; S Spencer; M Spir-Jacob; L Stawarz; L Sun; R Steenkamp; C Stegmann; S Steinmassl; C Steppa; T Takahashi; T Tanaka; T Tavernier; AM Taylor; R Terrier; C Thorpe-Morgan; JHE Thiersen; M Tluczykont; L Tomankova; M Tsirou; M Tsuji; R Tuffs; Y Uchiyama; DJ van der Walt; C van Eldik; C van Rensburg; B van Soelen; G Vasileiadis; J Veh; C Venter; P Vincent; A Viana; J Vink; HJ Voelk; SJ Wagner; F Werner; R White; A Wierzcholska; Yu Wun Wong; H Yassin; A Yusafzai; M Zacharias; R Zanin; D Zargaryan; AA Zdziarski; A Zech; SJ Zhu; A Zmija; J Zorn; S Zouari; N Zywucka |
| Publication Year: | 2021 |
| Collection: | University of Leicester: Figshare |
| Subject Terms: | Science & Technology; Physical Sciences; Astronomy & Astrophysics; GAMMA-RAY; BARYONIC PHYSICS; MASS FUNCTION; GALAXY; CLUMPY; SUBHALOES; PROJECT; IMPACT |
| Description: | Cosmological N-body simulations show that Milky Way-sized galaxies harbor a population of unmerged dark matter (DM) subhalos. These subhalos could shine in gamma-rays and eventually be detected in gamma-ray surveys as unidentified sources. We performed a thorough selection among unidentified Fermi-Large Area Telescope Objects (UFOs) to identify them as possible tera-electron-volt-scale DM subhalo candidates. We search for very-high-energy (E ⪆ 100 GeV) gamma-ray emissions using H.E.S.S. observations toward four selected UFOs. Since no significant very-high-energy gamma-ray emission is detected in any data set of the four observed UFOs or in the combined UFO data set, strong constraints are derived on the product of the velocity-weighted annihilation cross section σ v by the J factor for the DM models. The 95% confidence level observed upper limits derived from combined H.E.S.S. observations reach σ vJ values of 3.7 ? 10-5 and 8.1 ? 10-6 GeV2 cm-2 s-1 in the W + W - and τ + τ - channels, respectively, for a 1 TeV DM mass. Focusing on thermal weakly interacting massive particles, the H.E.S.S. constraints restrict the J factors to lie in the range 6.1 ? 1019-2.0 ? 1021 GeV2 cm-5 and the masses to lie between 0.2 and 6 TeV in the W + W - channel. For the τ + τ - channel, the J factors lie in the range 7.0 ? 1019-7.1 ? 1020 GeV2 cm-5 and the masses lie between 0.2 and 0.5 TeV. Assuming model-dependent predictions from cosmological N-body simulations on the J-factor distribution for Milky Way-sized galaxies, the DM models with masses >0.3 TeV for the UFO emissions can be ruled out at high confidence level. |
| Document Type: | article in journal/newspaper |
| Language: | unknown |
| Relation: | 2381/16797916.v1 |
| Availability: | https://figshare.com/articles/journal_contribution/Search_for_Dark_Matter_Annihilation_Signals_from_Unidentified_Fermi-LAT_Objects_with_H_E_S_S/16797916 |
| Rights: | All Rights Reserved |
| Accession Number: | edsbas.2DD9B421 |
| Database: | BASE |