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1. Search for dark matter annihilation signatures in H.E.S.S. observations of dwarf spheroidal galaxies

Author

S. Rosier-Lees, Jacco Vink, Sabrina Casanova, H. Sano, D. Gottschall, P. Vincent, M. J. Vorster, Marie-Hélène Grondin, Christo Venter, V. Sahakian, M. de Naurois, S. J. Fegan, Petter Hofverberg, Denis Wouters, Michael Punch, Stefano Gabici, C. Jahn, Svenja Carrigan, Tanya Edwards, R. Moderski, A. Zech, Quirin Weitzel, G. Fontaine, A. Jacholkowska, J. Lau, A. Ivascenko, I. D. Davids, Y. Cui, E. Birsin, Y. A. Gallant, H.-S. Zechlin, Robert Wagner, Thomas Lohse, W. Kluźniak, J. Becker Tjus, T. Vuillaume, I. Reichardt, H. Laffon, F. Feinstein, Andreas Quirrenbach, F. Krayzel, S. Krakau, G. Heinzelmann, J. Bolmont, Alicja Wierzcholska, Ramin Marx, C. Couturier, D. Fernandez, M. Grudzińska, N. W. Pekeur, Axel Donath, Christian Stegmann, Stefan Wagner, S. Schwarzburg, M. Kieffer, Martin Ward, Cameron B Rulten, P. Wagner, S. Balenderan, P. Willmann, Vincent Marandon, Michal Dyrda, F. Ait Benkhali, M. A. Kastendieck, A. Fiasson, Markus Holler, Andrew M. Taylor, P. P. Krueger, Nachiketa Chakraborty, André Schulz, J. Méhault, Michael Zacharias, S. Schwemmer, Werner Hofmann, Michał Ostrowski, Michael Backes, Emmanuel Moulin, Felix Aharonian, G. Vasileiadis, Dieter Horns, J. Dyks, Anna Barnacka, Ł. Stawarz, O. Hervet, T. Garrigoux, J. Biteau, R. D. Parsons, Jan Conrad, Andrea Santangelo, A. A. Zdziarski, R. C. G. Chaves, K. Valerius, Heinrich J. Völk, Alexandre Marcowith, D. Kolitzus, Pierre Brun, Julien Lefaucheur, Manuel Meyer, Mateusz Janiak, K. Morå, Helen Poon, Gilles Henri, Marek Jamrozy, Pierre-Olivier Petrucci, W. Domainko, A. Wörnlein, M. Panter, A. Balzer, David Berge, Gianluca Giavitto, A. Lopatin, David Sanchez, Guy Pelletier, Ruizhi Yang, L. O'c. Drury, D. Klochkov, A. Djannati-Ataï, A. Förster, S. Häffner, Helene Sol, Stefan Ohm, Uli Katz, S. Pita, J.-P. Lenain, S. Bernhard, Aion Viana, Alison Mitchell, B. van Soelen, B. Rudak, Kathrin Egberts, S. Klepser, B. Degrange, Frank M. Rieger, J. Harris, C. Romoli, Guillaume Dubus, K. Bernloehr, Gavin Rowell, M. Bryan, Matthias Weidinger, David Salek, S. Colafrancesco, Reinhard Schlickeiser, Karl Kosack, Tomasz Bulik, B. Opitz, D. Zaborov, T. Tavernier, R. de los Reyes, Pol Bordas, Yvonne Becherini, F. Stinzing, M. Dalton, B. Giebels, Johan Bregeon, P. M. Chadwick, J.-P. Tavernet, G. Maurin, E. O. Angüner, M. Paz Arribas, M. Mayer, M. Tluczykont, C. Farnier, U. Menzler, K. Dutson, F. Spies, L. Oakes, Ullrich Schwanke, N. Maxted, Francesca Volpe, M. Gajdus, B. Khélifi, Y. Fukui, G. Hermann, Regis Terrier, F. Schüssler, Marianne Lemoine-Goumard, S. J. Nolan, Joachim Hahn, V. Lefranc, Victor Zabalza, A. G. Akhperjanian, R. Chalme-Calvet, Satoshi Yoshiike, Andreas Hillert, R. Steenkamp, K. Stycz, Christoph Deil, S. Raab, A. Abramowski, Catherine Boisson, J. F. Glicenstein, Jim Hinton, Nu. Komin, H. Odaka, M. Füßling, Sarah Kaufmann, J. Veh, Markus Böttcher, T. J. L. McComb, B. Peyaud, R. White, P. J. Meintjes, Francois Brun, M. Chrétien, P. deWilt, K. Katarzyński, P. Espigat, I. Jung-Richardt, I. Oya, Jacek Niemiec, A. Lemière, Olaf Reimer, Thomas Murach, G. Lamanna, Felix Spanier, G. Cologna, C. van Eldik, Felix Jankowsky, M. Renaud, Chia-Chun Lu, G. Pühlhofer, A. Reimer, Iurii Sushch, T. Fukuda, D. Hadasch, G. Spengler, M. Mohamed, M. V. Fernandes, C. Trichard, Peter Eger, H.E.S.S. Collaboration, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Particules de Montpellier (LUPM), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), HESS, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules)

Subjects
Nuclear and High Energy Physics, Milky Way, Astrophysics::High Energy Astrophysical Phenomena, Dwarf galaxy problem, Hochenergie-Astrophysik Theorie - Abteilung Hofmann, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Black dwarf, Galaxy group, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, ddc:530, 010303 astronomy & astrophysics, HESS - Abteilung Hofmann, Astrophysics::Galaxy Astrophysics, Dwarf galaxy, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Institut für Physik und Astronomie, Astronomy, Galaxy, Dwarf spheroidal galaxy, Elliptical galaxy, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of non-thermal high-energy gamma-ray emission or intense star formation. Therefore they are amongst the most promising candidates for indirect dark matter searches. During the last years the High Energy Stereoscopic System (H.E.S.S.) of imaging atmospheric Cherenkov telescopes observed five of these dwarf galaxies for more than 140 hours in total, searching for TeV gamma-ray emission from annihilation of dark matter particles. The new results of the deep exposure of the Sagittarius dwarf spheroidal galaxy, the first observations of the Coma Berenices and Fornax dwarves and the re-analysis of two more dwarf spheroidal galaxies already published by the H.E.S.S. Collaboration, Carina and Sculptor, are presented. In the absence of a significant signal new constraints on the annihilation cross-section applicable to Weakly Interacting Massive Particles (WIMPs) are derived by combining the observations of the five dwarf galaxies. The combined exclusion limit depends on the WIMP mass and the best constraint is reached at 1-2 TeV masses with a cross-section upper bound of ~3.9x10-24 cm^3 s-1 at a 95% confidence level., Comment: to be published in Physical Review D journal; Contact authors: E. Birsin, C. Farnier, G. Lamanna

Published
2014

2. Erratum: 'Search for Dark Matter Annihilation Signals from the Fornax Galaxy Cluster with H.E.S.S.' (2012, ApJ, 750, 123)

Author

A. Schulz, L. O'c. Drury, J. Becker Tjus, K. Katarzyński, Nu. Komin, S. Bernhard, S. J. Fegan, P.-O. Petrucci, Svenja Carrigan, E. Birsin, Y. Cui, Yvonne Becherini, E. O. Angüner, Guillaume Dubus, S. Klepser, Axel Donath, P. Vincent, Anne Lemiere, M. J. Vorster, J. Lau, M. Füßling, P. Espigat, Vincent Marandon, Christo Venter, D. Berge, I. Jung-Richardt, C. Jahn, M. Gajdus, Satoshi Yoshiike, Y. A. Gallant, H.-S. Zechlin, Catherine Boisson, Michael Punch, A. Jacholkowska, U. F. Katz, T. Tavernier, R. Moderski, A. Zech, D. Gottschall, S. J. Nolan, K. Morå, T. Murach, B. Peyaud, C. Romoli, Emmanuel Moulin, U. Menzler, Joachim Hahn, M. Janiak, P. P. Krueger, I. Oya, Jacek Niemiec, Pierre Brun, M. Mohamed, R. Chalme-Calvet, S. Raab, A. Abramowski, Robert Wagner, Olaf Reimer, C. Trichard, Quirin Weitzel, Thomas Lohse, M. Paz Arribas, S. Pita, Johannes Veh, M. Tluczykont, R. C. G. Chaves, A. M. W. Mitchell, P. J. Meintjes, T. Garrigoux, M. Panter, Ullrich Schwanke, Christian Farnier, M. Dalton, G. Pühlhofer, A. Balzer, M. de Naurois, Stefan Wagner, M. Lemoine-Goumard, M. Mayer, Jan Conrad, M. Bryan, A. Djannati-Ataï, A. G. Akhperjanian, D. Fernandez, Dieter Horns, D. Klochkov, A. Reimer, Tomasz Bulik, M. A. Kastendieck, T. Fukuda, R. Steenkamp, I. Reichardt, Jim Hinton, S. Gabici, Ruizhi Yang, F. Schüssler, Aion Viana, Stefan Ohm, A. A. Zdziarski, G. Vasileiadis, G. Heinzelmann, A.M. Taylor, K. Dutson, Marek Jamrozy, S. Krakau, G. Fontaine, David Sanchez, M. Böttcher, Helene Sol, J. Bolmont, Iurii Sushch, P. deWilt, S. Schwarzburg, B. Opitz, Ramin Marx, Karl Kosack, G. Giavitto, C. Couturier, Alicja Wierzcholska, G. Spengler, S. Kaufmann, B. Khélifi, P. Willmann, Michal Dyrda, Christoph Deil, F. Spies, G. Lamanna, Y. Fukui, G. Hermann, Regis Terrier, L. Oakes, J. Dyks, N. Maxted, Hidetoshi Sano, Michał Ostrowski, M. V. Fernandes, J. Lefaucheur, J.-P. Lenain, J. Vink, I. D. Davids, W. Domainko, D. Salek, Reinhard Schlickeiser, J.-P. Tavernet, Pol Bordas, J. Harris, R. D. Parsons, Nachiketa Chakraborty, Peter Eger, Petter Hofverberg, A. Wörnlein, A. Ivascenko, S. Colafrancesco, S. Schwemmer, Anna Barnacka, Andrea Santangelo, Alexandre Marcowith, F. Krayzel, Helen Poon, M. Grudzińska, A. Lopatin, Werner Hofmann, F. Feinstein, H. Odaka, J. Mehault, Tanya Edwards, M. Backes, A. Fiasson, P. M. Chadwick, Gilles Henri, F. Jankowsky, Gavin Rowell, D. Zaborov, R. de los Reyes, Guy Pelletier, A. Förster, Victor Zabalza, F. Stinzing, B. Giebels, Andreas Hillert, V. Sahakian, Andreas Quirrenbach, T. Vuillaume, Michael Zacharias, K. Stycz, J. F. Glicenstein, Łukasz Stawarz, Heinrich J. Völk, M. Kieffer, D. Hadasch, F. Ait Benkhali, P. Wagner, Martin Ward, Francesca Volpe, Cameron B Rulten, S. Balenderan, J. Biteau, Markus Holler, Felix Aharonian, H. Laffon, M. Chrétien, S. Häffner, K. Valerius, Marie-Hélène Grondin, Denis Wouters, O. Hervet, W. Kluźniak, Matthias Weidinger, V. Lefranc, S. Rosier-Lees, Sabrina Casanova, C. Stegmann, B. van Soelen, B. Rudak, Kathrin Egberts, B. Degrange, Frank M. Rieger, F. Spanier, K. Bernloehr, Gilles Maurin, N. W. Pekeur, Michael Meyer, Francois Brun, G. Cologna, C. van Eldik, J. Bregeon, M. Renaud, T. J. L. McComb, D. Kolitzus, Chia-Chun Lu, R. White, and H.E.S.S. Collaboration

Subjects
Physics, Annihilation, Space and Planetary Science, Dark matter, Hochenergie-Astrophysik Theorie - Abteilung Hofmann, Astronomy, Astronomy and Astrophysics, Astrophysics, HESS - Abteilung Hofmann, Galaxy cluster
Published
2014

3. Systematic search for high-energy gamma-ray emission from bow shocks of runaway stars

Author

Olivier Hervet, J. Bregeon, H. Iwasaki, Pierre Brun, R. C. G. Chaves, E. O. Angüner, I.D. Davids, F. Ait Benkhali, M. Haupt, G. Cologna, Matteo Cerruti, A. F¨orster, M. Coffaro, Gilles Henri, D. Gottschall, P. Bordas, Tomasz Bulik, A. Jacholkowska, H. Abdalla, Werner Hofmann, S. Gabici, J. Bolmont, S. Colafrancesco, A. Balzer, Marek Jamrozy, S. Fegan, M. Büchele, B. Giebels, Yuzhu Cui, Jim Hinton, N. Chakraborty, Justine Devin, Dieter Horns, A. Djannati-Ataï, B. Condon, M. Böttcher, A. Ivascenko, J. Dyks, Clemens Hoischen, T. Andersson, Mateusz Janiak, K. Dutson, M. Capasso, M. Arrieta, G. Heinzelmann, C. Farnier, Joachim Hahn, Sabrina Casanova, Francois Brun, M. Chrétien, Monica Barnard, Stefan Funk, Y.A. Gallant, T. Garrigoux, Christoph Deil, G. Hermann, M. Füßling, Axel Donath, A. W. Chen, Michael Backes, M. Bryan, M. Gajdus, J. Chevalier, Catherine Boisson, J. Becker Tjus, Jan Conrad, R. Chalme-Calvet, J. Jeffrey Carr, M.-H. Grondin, J.-P. Ernenwein, W. Domainko, S. Bernhard, J.F. Glicenstein, B. Degrange, Pierre-Henri Aubert, L. O'c. Drury, Konrad Bernlöhr, Gianluca Giavitto, A. Abramowski, R. Blackwell, J. Hawkes, P. deWilt, M. V. Fernes, Markus Holler, Peter Eger, D. Berge, Felix Aharonian, A. G. Akhperjanian, Tanya Edwards, S. Eschbach, G. Fontaine, A. Fiasson, K. Egberts, Masanori Arakawa, J. Decock, L. Dirson, Arti Goyal, and Yvonne Becherini

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Photon, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Kinetic energy, Radio spectrum, Interstellar medium, Stars, Space and Planetary Science, ddc:520, Astrophysics::Solar and Stellar Astrophysics, Bow shock (aerodynamics), Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics, Fermi Gamma-ray Space Telescope
Abstract

Context. It has been suggested that the bow shocks of runaway stars are sources of high-energy gamma rays (E > 100 MeV). Theoretical models predicting high-energy gamma-ray emission from these sources were followed by the first detection of non-thermal radio emission from the bow shock of BD+43$^��$ 3654 and non-thermal X-ray emission from the bow shock of AE Aurigae. Aims. We perform the first systematic search for MeV and GeV emission from 27 bow shocks of runaway stars using data collected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope (Fermi). Methods. We analysed 57 months of Fermi-LAT data at the positions of 27 bow shocks of runaway stars extracted from the Extensive stellar BOw Shock Survey catalogue (E-BOSS). A likelihood analysis was performed to search for gamma-ray emission that is not compatible with diffuse background or emission from neighbouring sources and that could be associated with the bow shocks. Results. None of the bow shock candidates is detected significantly in the Fermi-LAT energy range. We therefore present upper limits on the high-energy emission in the energy range from 100 MeV to 300 GeV for 27 bow shocks of runaway stars in four energy bands. For the three cases where models of the high-energy emission are published we compare our upper limits to the modelled spectra. Our limits exclude the model predictions for Zeta Ophiuchi by a factor $\approx$ 5., 5 pages, 5 figures, 1 table, accepted by A&A

Published
2014
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