Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.

M. Cirelli; P. Panci; F. Sala; J. Silk; M. Taoso; H. Abdalla; F. Aharonian; F. Ait Benkhali; E. O. Angüner; M. Arakawa; C. Arcaro; C. Armand; M. Arrieta; M. Backes; M. Barnard; Y. Becherini; J. Becker Tjus; D. Berge; S. Bernhard; K. Bernlöhr; R. Blackwell; M. Böttcher; C. Boisson; J. Bolmont; S. Bonnefoy; P. Bordas; J. Bregeon; F. Brun; P. Brun; M. Bryan; M. Büchele; T. Bulik; T. Bylund; M. Capasso; S. Caroff; A. Carosi; S. Casanova; M. Cerruti; N. Chakraborty; S. Chandra; R. C.G. Chaves; A. Chen; S. Colafrancesco; B. Condon; I. D. Davids; C. Deil; J. Devin; P. Dewilt; L. Dirson; A. Djannati-Ataï; A. Dmytriiev; A. Donath; V. Doroshenko; L. O. Drury; J. Dyks; K. Egberts; G. Emery; J. P. Ernenwein; S. Eschbach; S. Fegan; A. Fiasson; G. Fontaine; S. Funk; M. Füßling; S. Gabici; Y. A. Gallant; F. Gaté; G. Giavitto; D. Glawion; J. F. Glicenstein; D. Gottschall; M. H. Grondin; J. Hahn; M. Haupt; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; W. Hofmann; C. Hoischen; T. L. Holch; M. Holler; D. Horns; D. Huber; H. Iwasaki; A. Jacholkowska; M. Jamrozy; D. Jankowsky; F. Jankowsky; L. Jouvin; I. Jung-Richardt; M. A. Kastendieck; K. Katarzyński; M. Katsuragawa; U. Katz; D. Kerszberg; D. Khangulyan; B. Khélifi; J. King; S. Klepser; W. Kluźniak; Nu Komin; K. Kosack; S. Krakau; M. Kraus; P. P. Krüger; G. Lamanna; J. Lau; J. Lefaucheur; A. Lemière; M. Lemoine-Goumard; J. P. Lenain; E. Leser; T. Lohse; M. Lorentz; R. López-Coto; I. Lypova; D. Malyshev; V. Marandon; A. Marcowith; C. Mariaud; G. Martí-Devesa; R. Marx; G. Maurin; P. J. Meintjes; A. M.W. Mitchell; R. Moderski; M. Mohamed; L. Mohrmann; E. Moulin; T. Murach; S. Nakashima; M. De Naurois; H. Ndiyavala; F. Niederwanger; J. Niemiec; L. Oakes; P. O'Brien; H. Odaka; S. Ohm; M. Ostrowski; I. Oya; M. Padovani; M. Panter; R. D. Parsons; C. Perennes; P. O. Petrucci; B. Peyaud; Q. Piel; S. Pita; V. Poireau; A. Priyana Noel; D. A. Prokhorov; H. Prokoph; G. Pühlhofer; M. Punch; A. Quirrenbach; S. Raab; R. Rauth; A. Reimer; O. Reimer; M. Renaud; F. Rieger; L. Rinchiuso; C. Romoli; G. Rowell; B. Rudak; E. Ruiz-Velasco; V. Sahakian; S. Saito; D. A. Sanchez; A. Santangelo; M. Sasaki; R. Schlickeiser; F. Schüssler; A. Schulz; U. Schwanke; S. Schwemmer; M. Seglar-Arroyo; M. Senniappan; A. S. Seyffert; N. Shafi; I. Shilon; K. Shiningayamwe; R. Simoni; A. Sinha; H. Sol; F. Spanier; A. Specovius; M. Spir-Jacob; Stawarz; R. Steenkamp; C. Stegmann; C. Steppa; T. Takahashi; J. P. Tavernet; T. Tavernier; A. M. Taylor; R. Terrier; L. Tibaldo; D. Tiziani; M. Tluczykont; C. Trichard; M. Tsirou; N. Tsuji; R. Tuffs; Y. Uchiyama; D. J. Van Der Walt; C. Van Eldik; C. Van Rensburg; B. Van Soelen; G. Vasileiadis; J. Veh; C. Venter; A. Viana; P. Vincent; J. Vink; F. Voisin; H. J. Völk; T. Vuillaume; Z. Wadiasingh; S. J. Wagner; R. M. Wagner; R. White; A. Wierzcholska; R. Yang; D. Zaborov; M. Zacharias; R. Zanin; A. A. Zdziarski; A. Zech; F. Zefi; A. Ziegler; J. Zorn; N. Żywucka

doi:10.1088/1475-7516/2018/11/037

Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.

M. Cirelli, P. Panci, F. Sala, J. Silk, M. Taoso, H. Abdalla, F. Aharonian, F. Ait Benkhali, E. O. Angüner, M. Arakawa, C. Arcaro, C. Armand, M. Arrieta, M. Backes, M. Barnard, Y. Becherini, J. Becker Tjus, D. Berge, S. Bernhard, K. BernlöhrR. Blackwell, M. Böttcher, C. Boisson, J. Bolmont, S. Bonnefoy, P. Bordas, J. Bregeon, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, T. Bylund, M. Capasso, S. Caroff, A. Carosi, S. Casanova, M. Cerruti, N. Chakraborty, S. Chandra, R. C.G. Chaves, A. Chen, S. Colafrancesco, B. Condon, I. D. Davids, C. Deil, J. Devin, P. Dewilt, L. Dirson, A. Djannati-Ataï, A. Dmytriiev, A. Donath, V. Doroshenko, L. O. Drury, J. Dyks, K. Egberts, G. Emery, J. P. Ernenwein, S. Eschbach, S. Fegan, A. Fiasson, G. Fontaine, S. Funk, M. Füßling, S. Gabici, Y. A. Gallant, F. Gaté, G. Giavitto, D. Glawion, J. F. Glicenstein, D. Gottschall, M. H. Grondin, J. Hahn, M. Haupt, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, D. Horns, D. Huber, H. Iwasaki, A. Jacholkowska, M. Jamrozy, D. Jankowsky, F. Jankowsky, L. Jouvin, I. Jung-Richardt, M. A. Kastendieck, K. Katarzyński, M. Katsuragawa, U. Katz, D. Kerszberg, D. Khangulyan, B. Khélifi, J. King, S. Klepser, W. Kluźniak, Nu Komin, K. Kosack, S. Krakau, M. Kraus, P. P. Krüger, G. Lamanna, J. Lau, J. Lefaucheur, A. Lemière, M. Lemoine-Goumard, J. P. Lenain, E. Leser, T. Lohse, M. Lorentz, R. López-Coto, I. Lypova, D. Malyshev, V. Marandon, A. Marcowith, C. Mariaud, G. Martí-Devesa, R. Marx, G. Maurin, P. J. Meintjes, A. M.W. Mitchell, R. Moderski, M. Mohamed, L. Mohrmann, E. Moulin, T. Murach, S. Nakashima, M. De Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, P. O'Brien, H. Odaka, S. Ohm, M. Ostrowski, I. Oya, M. Padovani, M. Panter, R. D. Parsons, C. Perennes, P. O. Petrucci, B. Peyaud, Q. Piel, S. Pita, V. Poireau, A. Priyana Noel, D. A. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, A. Reimer, O. Reimer, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V. Sahakian, S. Saito, D. A. Sanchez, A. Santangelo, M. Sasaki, R. Schlickeiser, F. Schüssler, A. Schulz, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, I. Shilon, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, F. Spanier, A. Specovius, M. Spir-Jacob, Stawarz, R. Steenkamp, C. Stegmann, C. Steppa, T. Takahashi, J. P. Tavernet, T. Tavernier, A. M. Taylor, R. Terrier, L. Tibaldo, D. Tiziani, M. Tluczykont, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D. J. Van Der Walt, C. Van Eldik, C. Van Rensburg, B. Van Soelen, G. Vasileiadis, J. Veh, C. Venter, A. Viana, P. Vincent, J. Vink, F. Voisin, H. J. Völk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, R. M. Wagner, R. White, A. Wierzcholska, R. Yang, D. Zaborov, M. Zacharias, R. Zanin, A. A. Zdziarski, A. Zech, F. Zefi, A. Ziegler, J. Zorn, N. Żywucka

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about σ v ≲ 3 × 10^-25 cm³ s^-1 are obtained in the mass range of 400 GeV to 1 TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.

Original language	English
Article number	037
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2018
Issue number	11
DOIs	https://doi.org/10.1088/1475-7516/2018/11/037
State	Published - 23 Nov 2018
Externally published	Yes

Keywords

dark matter detectors
dark matter experiments
dwarfs galaxies
gamma ray detectors

ASJC Scopus subject areas

Astronomy and Astrophysics

Access to Document

10.1088/1475-7516/2018/11/037

Cite this

Cirelli, M., Panci, P., Sala, F., Silk, J., Taoso, M., Abdalla, H., Aharonian, F., Benkhali, F. A., Angüner, E. O., Arakawa, M., Arcaro, C., Armand, C., Arrieta, M., Backes, M., Barnard, M., Becherini, Y., Tjus, J. B., Berge, D., Bernhard, S., ... Żywucka, N. (2018). Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S. Journal of Cosmology and Astroparticle Physics, 2018(11), Article 037. https://doi.org/10.1088/1475-7516/2018/11/037

@article{3a49fc65bd4544bd8cecf4c396a52905,

title = "Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.",

abstract = "Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about σ v ≲ 3 × 10-25 cm3 s-1 are obtained in the mass range of 400 GeV to 1 TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.",

keywords = "dark matter detectors, dark matter experiments, dwarfs galaxies, gamma ray detectors",

author = "M. Cirelli and P. Panci and F. Sala and J. Silk and M. Taoso and H. Abdalla and F. Aharonian and Benkhali, {F. Ait} and Ang{\"u}ner, {E. O.} and M. Arakawa and C. Arcaro and C. Armand and M. Arrieta and M. Backes and M. Barnard and Y. Becherini and Tjus, {J. Becker} and D. Berge and S. Bernhard and K. Bernl{\"o}hr and R. Blackwell and M. B{\"o}ttcher and C. Boisson and J. Bolmont and S. Bonnefoy and P. Bordas and J. Bregeon and F. Brun and P. Brun and M. Bryan and M. B{\"u}chele and T. Bulik and T. Bylund and M. Capasso and S. Caroff and A. Carosi and S. Casanova and M. Cerruti and N. Chakraborty and S. Chandra and Chaves, {R. C.G.} and A. Chen and S. Colafrancesco and B. Condon and Davids, {I. D.} and C. Deil and J. Devin and P. Dewilt and L. Dirson and A. Djannati-Ata{\"i} and A. Dmytriiev and A. Donath and V. Doroshenko and Drury, {L. O.} and J. Dyks and K. Egberts and G. Emery and Ernenwein, {J. P.} and S. Eschbach and S. Fegan and A. Fiasson and G. Fontaine and S. Funk and M. F{\"u}{\ss}ling and S. Gabici and Gallant, {Y. A.} and F. Gat{\'e} and G. Giavitto and D. Glawion and Glicenstein, {J. F.} and D. Gottschall and Grondin, {M. H.} and J. Hahn and M. Haupt and G. Heinzelmann and G. Henri and G. Hermann and Hinton, {J. A.} and W. Hofmann and C. Hoischen and Holch, {T. L.} and M. Holler and D. Horns and D. Huber and H. Iwasaki and A. Jacholkowska and M. Jamrozy and D. Jankowsky and F. Jankowsky and L. Jouvin and I. Jung-Richardt and Kastendieck, {M. A.} and K. Katarzy{\'n}ski and M. Katsuragawa and U. Katz and D. Kerszberg and D. Khangulyan and B. Kh{\'e}lifi and J. King and S. Klepser and W. Klu{\'z}niak and Nu Komin and K. Kosack and S. Krakau and M. Kraus and Kr{\"u}ger, {P. P.} and G. Lamanna and J. Lau and J. Lefaucheur and A. Lemi{\`e}re and M. Lemoine-Goumard and Lenain, {J. P.} and E. Leser and T. Lohse and M. Lorentz and R. L{\'o}pez-Coto and I. Lypova and D. Malyshev and V. Marandon and A. Marcowith and C. Mariaud and G. Mart{\'i}-Devesa and R. Marx and G. Maurin and Meintjes, {P. J.} and Mitchell, {A. M.W.} and R. Moderski and M. Mohamed and L. Mohrmann and E. Moulin and T. Murach and S. Nakashima and {De Naurois}, M. and H. Ndiyavala and F. Niederwanger and J. Niemiec and L. Oakes and P. O'Brien and H. Odaka and S. Ohm and M. Ostrowski and I. Oya and M. Padovani and M. Panter and Parsons, {R. D.} and C. Perennes and Petrucci, {P. O.} and B. Peyaud and Q. Piel and S. Pita and V. Poireau and Noel, {A. Priyana} and Prokhorov, {D. A.} and H. Prokoph and G. P{\"u}hlhofer and M. Punch and A. Quirrenbach and S. Raab and R. Rauth and A. Reimer and O. Reimer and M. Renaud and F. Rieger and L. Rinchiuso and C. Romoli and G. Rowell and B. Rudak and E. Ruiz-Velasco and V. Sahakian and S. Saito and Sanchez, {D. A.} and A. Santangelo and M. Sasaki and R. Schlickeiser and F. Sch{\"u}ssler and A. Schulz and U. Schwanke and S. Schwemmer and M. Seglar-Arroyo and M. Senniappan and Seyffert, {A. S.} and N. Shafi and I. Shilon and K. Shiningayamwe and R. Simoni and A. Sinha and H. Sol and F. Spanier and A. Specovius and M. Spir-Jacob and Stawarz and R. Steenkamp and C. Stegmann and C. Steppa and T. Takahashi and Tavernet, {J. P.} and T. Tavernier and Taylor, {A. M.} and R. Terrier and L. Tibaldo and D. Tiziani and M. Tluczykont and C. Trichard and M. Tsirou and N. Tsuji and R. Tuffs and Y. Uchiyama and {Van Der Walt}, {D. J.} and {Van Eldik}, C. and {Van Rensburg}, C. and {Van Soelen}, B. and G. Vasileiadis and J. Veh and C. Venter and A. Viana and P. Vincent and J. Vink and F. Voisin and V{\"o}lk, {H. J.} and T. Vuillaume and Z. Wadiasingh and Wagner, {S. J.} and Wagner, {R. M.} and R. White and A. Wierzcholska and R. Yang and D. Zaborov and M. Zacharias and R. Zanin and Zdziarski, {A. A.} and A. Zech and F. Zefi and A. Ziegler and J. Zorn and N. {\.Z}ywucka",

note = "Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd and Sissa Medialab.",

year = "2018",

month = nov,

day = "23",

doi = "10.1088/1475-7516/2018/11/037",

language = "English",

volume = "2018",

journal = "Journal of Cosmology and Astroparticle Physics",

issn = "1475-7516",

publisher = "IOP Publishing Ltd.",

number = "11",

}

Cirelli, M, Panci, P, Sala, F, Silk, J, Taoso, M, Abdalla, H, Aharonian, F, Benkhali, FA, Angüner, EO, Arakawa, M, Arcaro, C, Armand, C, Arrieta, M, Backes, M, Barnard, M, Becherini, Y, Tjus, JB, Berge, D, Bernhard, S, Bernlöhr, K, Blackwell, R, Böttcher, M, Boisson, C, Bolmont, J, Bonnefoy, S, Bordas, P, Bregeon, J, Brun, F, Brun, P, Bryan, M, Büchele, M, Bulik, T, Bylund, T, Capasso, M, Caroff, S, Carosi, A, Casanova, S, Cerruti, M, Chakraborty, N, Chandra, S, Chaves, RCG, Chen, A, Colafrancesco, S, Condon, B, Davids, ID, Deil, C, Devin, J, Dewilt, P, Dirson, L, Djannati-Ataï, A, Dmytriiev, A, Donath, A, Doroshenko, V, Drury, LO, Dyks, J, Egberts, K, Emery, G, Ernenwein, JP, Eschbach, S, Fegan, S, Fiasson, A, Fontaine, G, Funk, S, Füßling, M, Gabici, S, Gallant, YA, Gaté, F, Giavitto, G, Glawion, D, Glicenstein, JF, Gottschall, D, Grondin, MH, Hahn, J, Haupt, M, Heinzelmann, G, Henri, G, Hermann, G, Hinton, JA, Hofmann, W, Hoischen, C, Holch, TL, Holler, M, Horns, D, Huber, D, Iwasaki, H, Jacholkowska, A, Jamrozy, M, Jankowsky, D, Jankowsky, F, Jouvin, L, Jung-Richardt, I, Kastendieck, MA, Katarzyński, K, Katsuragawa, M, Katz, U, Kerszberg, D, Khangulyan, D, Khélifi, B, King, J, Klepser, S, Kluźniak, W, Komin, N, Kosack, K, Krakau, S, Kraus, M, Krüger, PP, Lamanna, G, Lau, J, Lefaucheur, J, Lemière, A, Lemoine-Goumard, M, Lenain, JP, Leser, E, Lohse, T, Lorentz, M, López-Coto, R, Lypova, I, Malyshev, D, Marandon, V, Marcowith, A, Mariaud, C, Martí-Devesa, G, Marx, R, Maurin, G, Meintjes, PJ, Mitchell, AMW, Moderski, R, Mohamed, M, Mohrmann, L, Moulin, E, Murach, T, Nakashima, S, De Naurois, M, Ndiyavala, H, Niederwanger, F, Niemiec, J, Oakes, L, O'Brien, P, Odaka, H, Ohm, S, Ostrowski, M, Oya, I, Padovani, M, Panter, M, Parsons, RD, Perennes, C, Petrucci, PO, Peyaud, B, Piel, Q, Pita, S, Poireau, V, Noel, AP, Prokhorov, DA, Prokoph, H, Pühlhofer, G, Punch, M, Quirrenbach, A, Raab, S, Rauth, R, Reimer, A, Reimer, O, Renaud, M, Rieger, F, Rinchiuso, L, Romoli, C, Rowell, G, Rudak, B, Ruiz-Velasco, E, Sahakian, V, Saito, S, Sanchez, DA, Santangelo, A, Sasaki, M, Schlickeiser, R, Schüssler, F, Schulz, A, Schwanke, U, Schwemmer, S, Seglar-Arroyo, M, Senniappan, M, Seyffert, AS, Shafi, N, Shilon, I, Shiningayamwe, K, Simoni, R, Sinha, A, Sol, H, Spanier, F, Specovius, A, Spir-Jacob, M, Stawarz, Steenkamp, R, Stegmann, C, Steppa, C, Takahashi, T, Tavernet, JP, Tavernier, T, Taylor, AM, Terrier, R, Tibaldo, L, Tiziani, D, Tluczykont, M, Trichard, C, Tsirou, M, Tsuji, N, Tuffs, R, Uchiyama, Y, Van Der Walt, DJ, Van Eldik, C, Van Rensburg, C, Van Soelen, B, Vasileiadis, G, Veh, J, Venter, C, Viana, A, Vincent, P, Vink, J, Voisin, F, Völk, HJ, Vuillaume, T, Wadiasingh, Z, Wagner, SJ, Wagner, RM, White, R, Wierzcholska, A, Yang, R, Zaborov, D, Zacharias, M, Zanin, R, Zdziarski, AA, Zech, A, Zefi, F, Ziegler, A, Zorn, J & Żywucka, N 2018, 'Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.', Journal of Cosmology and Astroparticle Physics, vol. 2018, no. 11, 037. https://doi.org/10.1088/1475-7516/2018/11/037

TY - JOUR

T1 - Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.

AU - Cirelli, M.

AU - Panci, P.

AU - Sala, F.

AU - Silk, J.

AU - Taoso, M.

AU - Abdalla, H.

AU - Aharonian, F.

AU - Benkhali, F. Ait

AU - Angüner, E. O.

AU - Arakawa, M.

AU - Arcaro, C.

AU - Armand, C.

AU - Arrieta, M.

AU - Backes, M.

AU - Barnard, M.

AU - Becherini, Y.

AU - Tjus, J. Becker

AU - Berge, D.

AU - Bernhard, S.

AU - Bernlöhr, K.

AU - Blackwell, R.

AU - Böttcher, M.

AU - Boisson, C.

AU - Bolmont, J.

AU - Bonnefoy, S.

AU - Bordas, P.

AU - Bregeon, J.

AU - Brun, F.

AU - Brun, P.

AU - Bryan, M.

AU - Büchele, M.

AU - Bulik, T.

AU - Bylund, T.

AU - Capasso, M.

AU - Caroff, S.

AU - Carosi, A.

AU - Casanova, S.

AU - Cerruti, M.

AU - Chakraborty, N.

AU - Chandra, S.

AU - Chaves, R. C.G.

AU - Chen, A.

AU - Colafrancesco, S.

AU - Condon, B.

AU - Davids, I. D.

AU - Deil, C.

AU - Devin, J.

AU - Dewilt, P.

AU - Dirson, L.

AU - Djannati-Ataï, A.

AU - Dmytriiev, A.

AU - Donath, A.

AU - Doroshenko, V.

AU - Drury, L. O.

AU - Dyks, J.

AU - Egberts, K.

AU - Emery, G.

AU - Ernenwein, J. P.

AU - Eschbach, S.

AU - Fegan, S.

AU - Fiasson, A.

AU - Fontaine, G.

AU - Funk, S.

AU - Füßling, M.

AU - Gabici, S.

AU - Gallant, Y. A.

AU - Gaté, F.

AU - Giavitto, G.

AU - Glawion, D.

AU - Glicenstein, J. F.

AU - Gottschall, D.

AU - Grondin, M. H.

AU - Hahn, J.

AU - Haupt, M.

AU - Heinzelmann, G.

AU - Henri, G.

AU - Hermann, G.

AU - Hinton, J. A.

AU - Hofmann, W.

AU - Hoischen, C.

AU - Holch, T. L.

AU - Holler, M.

AU - Horns, D.

AU - Huber, D.

AU - Iwasaki, H.

AU - Jacholkowska, A.

AU - Jamrozy, M.

AU - Jankowsky, D.

AU - Jankowsky, F.

AU - Jouvin, L.

AU - Jung-Richardt, I.

AU - Kastendieck, M. A.

AU - Katarzyński, K.

AU - Katsuragawa, M.

AU - Katz, U.

AU - Kerszberg, D.

AU - Khangulyan, D.

AU - Khélifi, B.

AU - King, J.

AU - Klepser, S.

AU - Kluźniak, W.

AU - Komin, Nu

AU - Kosack, K.

AU - Krakau, S.

AU - Kraus, M.

AU - Krüger, P. P.

AU - Lamanna, G.

AU - Lau, J.

AU - Lefaucheur, J.

AU - Lemière, A.

AU - Lemoine-Goumard, M.

AU - Lenain, J. P.

AU - Leser, E.

AU - Lohse, T.

AU - Lorentz, M.

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PY - 2018/11/23

Y1 - 2018/11/23

N2 - Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about σ v ≲ 3 × 10-25 cm3 s-1 are obtained in the mass range of 400 GeV to 1 TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.

AB - Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about σ v ≲ 3 × 10-25 cm3 s-1 are obtained in the mass range of 400 GeV to 1 TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.

KW - dark matter detectors

KW - dark matter experiments

KW - dwarfs galaxies

KW - gamma ray detectors

UR - http://www.scopus.com/inward/record.url?scp=85057627480&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2018/11/037

DO - 10.1088/1475-7516/2018/11/037

M3 - Article

AN - SCOPUS:85057627480

SN - 1475-7516

VL - 2018

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 11

M1 - 037

ER -

Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.

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