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

H. E. S. S. Collaboration; Abdallah, H.; Adam, R.; Aharonian, F.; Ait Benkhali, F.; Angüner, E. O.; Arakawa, M.; Arcaro, C.; Armand, C.; Armstrong, T.; Ashkar, H.; Backes, M.; Baghmanyan, V.; Barbosa Martins, V.; 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, G.; Curyło, M.; Davids, I. D.; Davies, J.; Deil, C.; Devin, J.; deWilt, P.; Dirson, L.; Djannati-Ataï, A.; Dmytriiev, A.; Donath, A.; Doroshenko, V.; Dyks, J.; Egberts, K.; Eichhorn, F.; Emery, G.; Ernenwein, J. -P.; Eschbach, S.; Feijen, K.; Fegan, S.; Fiasson, A.; Fontaine, G.; Funk, S.; Füßling, M.; Gabici, S.; Gallant, Y. A.; Giavitto, G.; Giunti, L.; Glawion, D.; Glicenstein, J. F.; Gottschall, D.; Grondin, M. -H.; Hahn, J.; Haupt, M.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Hörbe, M.; Horns, D.; Huber, D.; Iwasaki, H.; Jamrozy, M.; Jankowsky, D.; Jankowsky, F.; Jardin-Blicq, A.; Joshi, V.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzyński, K.; Katsuragawa, M.; Katz, U.; Khangulyan, D.; Khélifi, B.; Klepser, S.; Kluźniak, W.; Komin, Nu.; Konno, R.; Kosack, K.; Kostunin, D.; Kreter, M.; Lamanna, G.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. -P.; Leser, E.; Levy, C.; Lohse, T.; Lypova, I.; Mackey, J.; Majumdar, J.; Malyshev, D.; Malyshev, D.; Marandon, V.; Marchegiani, P.; Marcowith, A.; Mares, A.; Martì-Devesa, G.; Marx, R.; Maurin, G.; Meintjes, P. J.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Moore, C.; Morris, P.; Moulin, E.; Muller, J.; Murach, T.; Nakashima, K.; Nakashima, S.; de Naurois, M.; Ndiyavala, H.; Niederwanger, F.; Niemiec, J.; Oakes, L.; O'Brien, P.; Odaka, H.; Ohm, S.; de Ona Wilhelmi, E.; Ostrowski, M.; Panter, M.; Parsons, R. D.; Peyaud, B.; Piel, Q.; Pita, S.; Poireau, V.; Noel, A. Priyana; Prokhorov, D. A.; Prokoph, H.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Raab, S.; Rauth, R.; Reimer, A.; Reimer, O.; Remy, Q.; Renaud, M.; Rieger, F.; Rinchiuso, L.; Romoli, C.; Rowell, G.; Rudak, B.; Ruiz-Velasco, E.; Sahakian, V.; Sailer, S.; Saito, S.; Sanchez, D. A.; 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, A.; Sol, H.; Specovius, A.; Spencer, S.; Spir-Jacob, M.; Stawarz, Ł.; Steenkamp, R.; Stegmann, C.; Steppa, C.; Takahashi, T.; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tiziani, D.; Tluczykont, M.; Tomankova, L.; Trichard, C.; Tsirou, M.; Tsuji, N.; Tuffs, R.; Uchiyama, Y.; van der Walt, D. J.; van Eldik, C.; van Rensburg, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venter, C.; Viana, A.; Vincent, P.; Vink, J.; Völk, H. J.; Vuillaume, T.; Wadiasingh, Z.; Wagner, S. J.; Watson, J.; Werner, F.; White, R.; Wierzcholska, A.; Yang, R.; Yoneda, H.; Zacharias, M.; Zanin, R.; Zargaryan, D.; Zdziarski, A. A.; Zech, A.; Zhu, S.; Zorn, J.; Żywucka, N.

doi:10.1103/PhysRevD.102.062001

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Journal Article

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

MPS-Authors

/persons/resource/persons30244

Aharonian, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons73513

Ait Benkhali, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30300

Bernlöhr, K.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons226175

Breuhaus, M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30369

Casanova, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30391

Deil, C.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30418

Donath, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30584

Hermann, G.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30597

Hinton, J. A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30605

Hofmann, W.
Prof. Werner Hofmann, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons185147

Jardin-Blicq, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons37725

Marandon, V.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons59477

Marx, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30878

Panter, M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons197757

Sailer, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31117

Tuffs, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31141

Völk, H. J.
Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons135685

Werner, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons146341

White, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons37755

Yang, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons216888

Zanin, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons192818

Zorn, J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

H. E. S. S. Collaboration, Abdallah, H., Adam, R., Aharonian, F., Ait Benkhali, F., Angüner, E. O., et al. (2020). Search for dark matter signals towards a selection of recently-detected DES dwarf galaxy satellites of the Milky Way with H.E.S.S. Physical Review D, 102(6): 062001. doi:10.1103/PhysRevD.102.062001.

Cite as: https://hdl.handle.net/21.11116/0000-0007-6A41-9

Abstract

Dwarf spheroidal galaxy satellites of the Milky Way are prime targets for
indirect detection of dark matter with gamma rays due to their proximity, high
dark matter content and absence of non-thermal emission processes. Recently,
the Dark Energy Survey (DES) revealed the existence of new ultra-faint dwarf
spheroidal galaxies in the southern-hemisphere sky, therefore ideally located
for ground-based observations with the imaging atmospheric Cherenkov telescope
array H.E.S.S. We present a search for very-high-energy ($E\gtrsim100$ GeV)
gamma-ray emission using H.E.S.S. observations carried out recently towards
Reticulum II, Tucana II, Tucana III, Tucana IV and Grus II satellites. No
significant very-high-energy gamma-ray excess is found from the observations on
any individual object nor in the combined analysis of all the datasets. Using
the most recent modeling of the dark matter distribution in the dwarf galaxy
halo, we compute for the first time on DES satellites individual and combined
constraints from Cherenkov telescope observations on the annihilation cross
section of dark matter particles in the form of Weakly Interacting Massive
Particles. The combined 95% C.L. observed upper limits reach $\langle \sigma v
\rangle \simeq 1 \times 10^{-23}$ cm$^3$s$^{-1}$ in the $W^+W^-$ channel and $4
\times 10^{-26}$ cm$^3$s$^{-1}$ in the $\gamma\gamma$ channels for a dark
matter mass of 1.5 TeV. The H.E.S.S. constraints well complement the results
from Fermi-LAT, HAWC, MAGIC and VERITAS and are currently the most stringent in
the $\gamma\gamma$ channels in the multi-GeV/multi-TeV mass range.