Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with H.E.S.S.

Abdallah, H.; Adam, R.; Aharonian, F.; Benkhali, F. Ait; Angüner, E. O.; Arakawa, M.; Arcaro, C.; Armand, Céline; Armstrong, Tom; Ashkar, Halim; Backes, Michael; Baghmanyan, Vardan; Martins, Victor Barbosa; Barnacka, A.; Barnard, M.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Böttcher, M.; Boisson, C.; Bolmont, J.; Bonnefoy, S.; Breuhaus, M.; Bregeon, J.; Brun, F.; Brun, P.; Bryan, M.; Büchele, M.; Bulik, T.; Bylund, T.; Caroff, S.; Carosi, A.; Casanova, S.; Chand, T.; Chandra, S.; Chen, A.; Cotter, Garret; Curyło, M.; Davids, I. D.; Davies, J.; Deil, C.; Devin, J.; deWilt, P.; Dirson, L.; Djannati‐Ataï, A.; Dmytriiev, A.; Donath, Axel; Doroshenko, V.; Dyks, J.; Egberts, K.; Eichhorn, F.; Emery, Gabriel; Ernenwein, J.-P.; Eschbach, S.; Feijen, Kirsty; Fegan, S. J.; Fiaßon, A.; Fontaine, G.; Funk, Sebastian; Füßling, M.; Gabici, S.; Gallant, Y. A.; Giavitto, G.; Giunti, Luca; Glawion, D.; Glicenstein, J. F.; Gottschall, D.; Grondin, M.-H.; Hahn, Joachim; Haupt, M.; Hermann, G.; Hinton, Jim; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Hörbe, M.; Horns, D.; Huber, David Miles; Iwasaki, H.; Jamrozy, M.; Jankowsky, D.; Jankowsky, F.; Jardin-Blicq, A.; Joshi, Vikas; Jung-Richardt, I.; Kastendieck, M. A.; Katarzyński, K.; Katsuragawa, M.; Katz, U.; Khangulyan, D.; Khélifi, B.; Klepser, S.; Kluźniak, W.; Komin, Nu.; Konno, Ruslan; Kosack, K.; Kostunin, D.; Kreter, M.; Lamanna, G.; Lemière, A.; Lemoine‐Goumard, M.; Lenain, J.‐P.; Leser, E.; Levy, C.; Löhse, T.; Lypova, I.; Mackey, Jonathan; Majumdar, Jhilik; Malyshev, D.; Marandon, V.; Marchegiani, ¶.; Marcowith, A.; Mares, Arnaud; Martí-Devesa, G.; Marx, R.; Maurin, G.; Meintjes, P. J.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Moore, C. J.; Morris, Paul; Moulin, Emmanuel; Müller, J.; Murach, T.; Nakashima, Kaori; Nakashima, Shinya; Naurois, M. de; Ndiyavala, H.; Niederwanger, F.; Niemiec, J.; Oakes, L.; O’Brien, P. T.; Odaka, Hirokazu; Ohm, S.; Wilhelmi, E. de Oña; Ostrowski, M.; Panter, M.; Parsons, R. D.; Peyaud, B.; Piel, Q.; Pita, S.; Poireau, V.; Noel, A. Priyana; Prokhorov, Dmitry; Prokoph, H.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Raab, S.; Rauth, R.; Reimer, A.; Reimer, O.; Remy, Quentin; Renaud, M.; Rieger, F.; Rinchiuso, L.; Romoli, C.; Rowell, G.; Rudak, B.; Ruiz-Velasco, E.; Sahakian, V.; Sailer, Simon; Saito, Shinya; Sánchez, David; Santangelo, A.; Sasaki, M.; Scalici, M.; Schüßler, F.; Schutter, H. M.; Schwanke, U.; Schwemmer, S.; Seglar-Arroyo, M.; Senniappan, M.; Seyffert, A. S.; Shafi, N.; Shiningayamwe, K.; Simoni, R.; Sinha, Atreyee; Sol, H.; Specovius, A.; Spencer, S.; Spir-Jacob, Marion; Stawarz, Ł.; Steenkamp, R.; Stegmann, C.; Steppa, C.; Takahashi, Tadayuki; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tiziani, D.; Tluczykont, M.; Tomankova, L.; Trichard, C.; Tsirou, M.; Tsuji, N.; Tuffs, R.; Uchiyama, Y.; Walt, D. J. van der; Eldik, C. van; Rensburg, C. van; Soelen, B. van; Vasileiadis, G.; Veh, J.; Venter, C.; Viana, A.; Vincent, P.; Vink, Jacco; Völk, H. J.; Vuillaume, Thomas; Wadiasingh, Zorawar; Wagner, S. J.; Watson, Jason; Werner, F.; White, R.; Wierzcholska, A.; Yang, R.; Yoneda, Hiroki; Zacharias, M.; Zanin, R.; Zargaryan, Davit; Zdziarski, A. A.; Zech, A.; Zhu, Shou-hua; Zorn, J.; Żywucka, N.

doi:10.1103/physrevd.102.062001

Cited by 45 publications

(37 citation statements)

References 52 publications

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“…The results obtained on WLM in this work can be discussed in light of recent H.E.S.S. results obtained on ultrafaint dwarf spheroidal galaxies [12]. The latter have a higher total J factor with log 10 ðJ=GeV 2 cm −5 srÞ from 18.7 to 19.6.…”

Section: Constraints On Hσvisupporting

confidence: 70%

“…In this article, we present an analysis of the γ-ray events observed in the direction of the irregular galaxy WLM. This new search complements the studies carried out for DM from dwarf spheroidal galaxies [10][11][12] and from the galactic center [13,14]. Compared to dwarf irregular galaxies, dwarf spheroidal galaxies have larger J factors, but the knowledge on J is limited by the number of spectroscopic measurements of individual stars.…”

Section: Introductionmentioning

confidence: 71%

“…No quantitative study has been performed so far on the systematic uncertainties on WLM J factor, and, therefore, they are not considered in our upper limit computations. In the case of the ultrafaint dwarf spheroidal galaxies, taking into account the estimated uncertainties on the J factor due to the limited number of tracers can degrade the upper limits by an order of magnitude [12]. Studying a dwarf irregular galaxy such as WLM provides a new physical DM-dominated environment to search for potential DM signals, with other types of inherent uncertainties.…”

Section: Constraints On Hσvimentioning

confidence: 99%

See 2 more Smart Citations

Search for dark matter annihilation in the Wolf-Lundmark-Melotte dwarf irregular galaxy with H.E.S.S.

Abdallah¹,

Adam²,

Aharonian³

et al. 2021

Phys. Rev. D

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Section: Constraints On Hσvisupporting

confidence: 70%

Section: Introductionmentioning

confidence: 71%

Section: Constraints On Hσvimentioning

confidence: 99%

See 1 more Smart Citation

Search for dark matter annihilation in the Wolf-Lundmark-Melotte dwarf irregular galaxy with H.E.S.S.

Abdallah¹,

Adam²,

Aharonian³

et al. 2021

Phys. Rev. D

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“…Other compelling and complementary targets for the search of DM annihilation signals that have been recently observed by H.E.S.S. are unidentified Fermi-LAT objects (UFOs) [32] as source candidates for DM subhalos populating the main Galactic Halo, ultra-faint dwarf galaxy satellites of the Milky Way recently detected by the Dark Energy Survey (DES) [34], and the dwarf irregular galaxy WLM [33]. We report here on the first results of a new search for DM annihilation signals from the GC region.…”

Section: Dark Matter Search With Gamma-ray Observationsmentioning

confidence: 99%

Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey

Montanari¹,

Abdalla²,

Aharonian³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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The presence of dark matter (DM) is suggested by a wealth of astrophysical and cosmological measurements. However, its underlying nature is yet unknown. Among the most promising candidates are weakly interacting massive particles (WIMPs): particles with mass and coupling strength at the electroweak scale and thermally-produced in the early universe have a present relic density consistent with that observed today. WIMP self-annihilation would produce Standard Model particles including gamma-rays, which have been long-time recognized as a prime messenger to indirectly detect dark matter signals. The centre of the Milky Way is predicted as the brightest source of DM annihilations. The H.E.S.S. collaboration is currently performing a survey of the inner region of the Milky Way, the Inner Galaxy Survey (IGS), intended to achieve the best sensitivity to faint and diffuse emissions in a region of several degrees around the Galactic Centre. We analyzed 2014-2020 observations taken with the five-telescope array to search for a DM annihilation signal. With the current dataset of about 550 hours, we found no significant excess and therefore derived strong constraints on the velocity-weighted annihilation cross-section. TeV thermal WIMPs can be probed in different annihilation channels.

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“…If they exist, they are also expected to self-annihilate into detectable Standard Model (SM) particles, including high-energy photons. Such indirect searches are conducted, for instance, by H.E.S.S., MAGIC and VERITAS Cherenkov telescopes looking at dense astronomical objects like the dwarf spheroidal satellite galaxies of the Milky Way [4]. These searches are sensitive to WIMPs in the TeV/c 2 mass range.…”

Section: Introductionmentioning

confidence: 99%

New NEMESIS Results

Trzaska¹,

Enqvist²,

Jȩdrzejczak³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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Preliminary results from a 349-day run (live time) with a 565 kg Pb target and a 166-day background measurement are presented. Three minor anomalies were detected in muon-suppressed neutron multiplicity spectra. The multiplicities of these one-sigma excesses match the outcome of an earlier, similar but independent measurement. The nature of the anomalies remains unclear, but, in principle, they may be a signature of self-annihilation of a Weakly Interacting Massive Particle (WIMP) with a mass around 10 GeV/c 2 . The expected cross section would be around 10 -42 cm 2 for Spin Dependent and 10 -46 cm 2 for Spin Independent interactions. Analysis of the event rate, based on the statistical uncertainty, indicates that cross-section limits for Dark Matter (DM) mass range of approximately 3-40 GeV/c 2 can be investigated with an upgraded NEMESIS setup.

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Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with H.E.S.S.

Cited by 45 publications

References 52 publications

Search for dark matter annihilation in the Wolf-Lundmark-Melotte dwarf irregular galaxy with H.E.S.S.

Search for dark matter annihilation in the Wolf-Lundmark-Melotte dwarf irregular galaxy with H.E.S.S.

Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey

New NEMESIS Results

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