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  1. Book ; Online: Radio Galaxies at TeV Energies

    Glawion, Dorit

    2020  

    Abstract: It is common believe that the centers of all galaxies exhibit supermassive black holes with masses ranging from millions up to billions of the mass of our Sun. By accreting surrounding matter, the luminosity of these galactic nuclei can outshine the ... ...

    Abstract It is common believe that the centers of all galaxies exhibit supermassive black holes with masses ranging from millions up to billions of the mass of our Sun. By accreting surrounding matter, the luminosity of these galactic nuclei can outshine the emission of their host galaxies. If this is the case, they are called active galactic nuclei. Some of these objects eject powerful outflows composed of plasma, called jets. These jets can produce non-thermal radiation which observable across the entire electromagnetic spectrum from radio up to the gamma-ray frequencies. At highest frequencies (TeV range) most of the detected active galaxies have jets directed along or close to the line of sight. However, also galaxies with larger angles to the line of sight showing fascinating features were discovered, in seeming contradiction to traditional models for these so-called radio galaxies. Thus, the latter are of particular importance for understanding active galactic nuclei in general. This Special Issue contains reviews and research articles about the current knowledge of radio galaxies at TeV energies, including observational results and theoretical models. It is intended to guide the interested reader deeper into this fascinating discipline of modern day astronomy
    Keywords Science (General) ; Physics ; Astronomy
    Size 1 electronic resource (188 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Document type Book ; Online
    Note eng ; Open Access
    HBZ-ID HT020589547
    ISBN 9783039287505 ; 9783039287512 ; 3039287508 ; 3039287516
    DOI 10.3390/books978-3-03928-751-2
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Acceleration and transport of relativistic electrons in the jets of the microquasar SS 433.

    Aharonian, F / Benkhali, F Ait / Aschersleben, J / Ashkar, H / Backes, M / Martins, V Barbosa / Batzofin, R / Becherini, Y / Berge, D / Bernlöhr, K / Bi, B / Böttcher, M / Boisson, C / Bolmont, J / de Lavergne, M de Bony / Borowska, J / Bouyahiaoui, M / Breuhaus, M / Brose, R /
    Brown, A M / Brun, F / Bruno, B / Bulik, T / Burger-Scheidlin, C / Caroff, S / Casanova, S / Cecil, R / Celic, J / Cerruti, M / Chand, T / Chandra, S / Chen, A / Chibueze, J / Chibueze, O / Cotter, G / Dai, S / Mbarubucyeye, J Damascene / Djannati-Ataï, A / Dmytriiev, A / Doroshenko, V / Egberts, K / Einecke, S / Ernenwein, J-P / Filipovic, M / Fontaine, G / Füßling, M / Funk, S / Gabici, S / Ghafourizadeh, S / Giavitto, G / Glawion, D / Glicenstein, J-F / Grolleron, G / Haerer, L / Hinton, J A / Hofmann, W / Holch, T L / Holler, M / Horns, D / Jamrozy, M / Jankowsky, F / Jardin-Blicq, A / Joshi, V / Jung-Richardt, I / Kasai, E / Katarzyński, K / Khatoon, R / Khélifi, B / Klepser, S / Kluźniak, W / Komin, Nu / Kosack, K / Kostunin, D / Kundu, A / Lang, R G / Le Stum, S / Leitl, F / Lemière, A / Lenain, J-P / Leuschner, F / Lohse, T / Luashvili, A / Lypova, I / Mackey, J / Malyshev, D / Marandon, V / Marchegiani, P / Marcowith, A / Martí-Devesa, G / Marx, R / Mehta, A / Mitchell, A / Moderski, R / Mohrmann, L / Montanari, A / Moulin, E / Murach, T / Nakashima, K / de Naurois, M / Niemiec, J / Noel, A Priyana / Ohm, S / Olivera-Nieto, L / de Ona Wilhelmi, E / Ostrowski, M / Panny, S / Panter, M / Parsons, R D / Peron, G / Prokhorov, D A / Pühlhofer, G / Punch, M / Quirrenbach, A / Reichherzer, P / Reimer, A / Reimer, O / Ren, H / Renaud, M / Reville, B / Rieger, F / Rowell, G / Rudak, B / Ricarte, H Rueda / Ruiz-Velasco, E / Sahakian, V / Salzmann, H / Santangelo, A / Sasaki, M / Schäfer, J / Schüssler, F / Schwanke, U / Shapopi, J N S / Sol, H / Specovius, A / Spencer, S / Stawarz, L / Steenkamp, R / Steinmassl, S / Steppa, C / Streil, K / Sushch, I / Suzuki, H / Takahashi, T / Tanaka, T / Taylor, A M / Terrier, R / Tsirou, M / Tsuji, N / Unbehaun, T / van Eldik, C / Vecchi, M / Veh, J / Venter, C / Vink, J / Wach, T / Wagner, S J / Werner, F / White, R / Wierzcholska, A / Wong, Yu Wun / Zacharias, M / Zargaryan, D / Zdziarski, A A / Zech, A / Zouari, S / Żywucka, N

    Science (New York, N.Y.)

    2024  Volume 383, Issue 6681, Page(s) 402–406

    Abstract: SS 433 is a microquasar, a stellar binary system that launches collimated relativistic jets. We observed SS 433 in gamma rays using the High Energy Stereoscopic System (H.E.S.S.) and found an energy-dependent shift in the apparent position of the gamma- ... ...

    Abstract SS 433 is a microquasar, a stellar binary system that launches collimated relativistic jets. We observed SS 433 in gamma rays using the High Energy Stereoscopic System (H.E.S.S.) and found an energy-dependent shift in the apparent position of the gamma-ray emission from the parsec-scale jets. These observations trace the energetic electron population and indicate that inverse Compton scattering is the emission mechanism of the gamma rays. Our modeling of the energy-dependent gamma-ray morphology constrains the location of particle acceleration and requires an abrupt deceleration of the jet flow. We infer the presence of shocks on either side of the binary system, at distances of 25 to 30 parsecs, and that self-collimation of the precessing jets forms the shocks, which then efficiently accelerate electrons.
    Language English
    Publishing date 2024-01-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adi2048
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Search for Dark Matter Annihilation Signals in the H.E.S.S. Inner Galaxy Survey.

    Abdalla, H / Aharonian, F / Benkhali, F Ait / Angüner, E O / Armand, C / Ashkar, H / Backes, M / Baghmanyan, V / Martins, V Barbosa / Batzofin, R / Becherini, Y / Berge, D / Bernlöhr, K / Bi, B / Böttcher, M / Bolmont, J / de Lavergne, M de Bony / Brose, R / Brun, F /
    Cangemi, F / Caroff, S / Cerruti, M / Chand, T / Chen, A / Cotter, G / Mbarubucyeye, J Damascene / Devin, J / Djannati-Ataï, A / Dmytriiev, A / Doroshenko, V / Egberts, K / Fiasson, A / de Clairfontaine, G Fichet / Fontaine, G / Funk, S / Gabici, S / Giavitto, G / Glawion, D / Glicenstein, J F / Grondin, M-H / Hinton, J A / Hofmann, W / Holch, T L / Holler, M / Horns, D / Huang, Zhiqiu / Jamrozy, M / Jankowsky, F / Kasai, E / Katarzyński, K / Katz, U / Khélifi, B / Kluźniak, W / Komin, Nu / Kosack, K / Kostunin, D / Lamanna, G / Lemoine-Goumard, M / Lenain, J-P / Leuschner, F / Lohse, T / Luashvili, A / Lypova, I / Mackey, J / Malyshev, D / Marandon, V / Marchegiani, P / Martí-Devesa, G / Marx, R / Maurin, G / Meyer, M / Mitchell, A / Moderski, R / Montanari, A / Moulin, E / Muller, J / de Naurois, M / Niemiec, J / Noel, A Priyana / Ohm, S / Olivera-Nieto, L / Wilhelmi, E de Ona / Ostrowski, M / Panny, S / Panter, M / Parsons, R D / Peron, G / Poireau, V / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Reichherzer, P / Reimer, A / Reimer, O / Renaud, M / Rieger, F / Rowell, G / Rudak, B / Ricarte, H Rueda / Ruiz-Velasco, E / Sahakian, V / Salzmann, H / Santangelo, A / Sasaki, M / Schüssler, F / Schutte, H M / Schwanke, U / Senniappan, M / Shapopi, J N S / Sol, H / Specovius, A / Spencer, S / Stawarz, Ł / Stegmann, C / Steinmassl, S / Steppa, C / Takahashi, T / Tanaka, T / Terrier, R / Thorpe-Morgan, C / Tluczykont, M / Tsirou, M / Tsuji, N / Uchiyama, Y / van Eldik, C / Veh, J / Vink, J / Wagner, S J / White, R / Wierzcholska, A / Wong, Yu Wun / Zacharias, M / Zargaryan, D / Zdziarski, A A / Zech, A / Zhu, S J / Zouari, S / Żywucka, N

    Physical review letters

    2022  Volume 129, Issue 11, Page(s) 111101

    Abstract: The central region of the Milky Way is one of the foremost locations to look for dark matter (DM) signatures. We report the first results on a search for DM particle annihilation signals using new observations from an unprecedented γ-ray survey of the ... ...

    Abstract The central region of the Milky Way is one of the foremost locations to look for dark matter (DM) signatures. We report the first results on a search for DM particle annihilation signals using new observations from an unprecedented γ-ray survey of the Galactic Center (GC) region, i.e., the Inner Galaxy Survey, at very high energies (≳100  GeV) performed with the H.E.S.S. array of five ground-based Cherenkov telescopes. No significant γ-ray excess is found in the search region of the 2014-2020 dataset and a profile likelihood ratio analysis is carried out to set exclusion limits on the annihilation cross section ⟨σv⟩. Assuming Einasto and Navarro-Frenk-White (NFW) DM density profiles at the GC, these constraints are the strongest obtained so far in the TeV DM mass range. For the Einasto profile, the constraints reach ⟨σv⟩ values of 3.7×10^{-26}  cm^{3} s^{-1} for 1.5 TeV DM mass in the W^{+}W^{-} annihilation channel, and 1.2×10^{-26}  cm^{3} s^{-1} for 0.7 TeV DM mass in the τ^{+}τ^{-} annihilation channel. With the H.E.S.S. Inner Galaxy Survey, ground-based γ-ray observations thus probe ⟨σv⟩ values expected from thermal-relic annihilating TeV DM particles.
    Language English
    Publishing date 2022-09-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.111101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi.

    Aharonian, F / Ait Benkhali, F / Angüner, E O / Ashkar, H / Backes, M / Baghmanyan, V / Barbosa Martins, V / Batzofin, R / Becherini, Y / Berge, D / Bernlöhr, K / Bi, B / Böttcher, M / Boisson, C / Bolmont, J / de Bony de Lavergne, M / Breuhaus, M / Brose, R / Brun, F /
    Caroff, S / Casanova, S / Cerruti, M / Chand, T / Chen, A / Cotter, G / Damascene Mbarubucyeye, J / Djannati-Ataï, A / Dmytriiev, A / Doroshenko, V / Duffy, C / Egberts, K / Ernenwein, J-P / Fegan, S / Feijen, K / Fiasson, A / Fichet de Clairfontaine, G / Fontaine, G / Füßling, M / Funk, S / Gabici, S / Gallant, Y A / Ghafourizadeh, S / Giavitto, G / Giunti, L / Glawion, D / Glicenstein, J F / Grondin, M-H / Hermann, G / Hinton, J A / Hörbe, M / Hofmann, W / Hoischen, C / Holch, T L / Holler, M / Horns, D / Huang, Zhiqiu / Jamrozy, M / Jankowsky, F / Jung-Richardt, I / Kasai, E / Katarzyński, K / Katz, U / Khangulyan, D / Khélifi, B / Klepser, S / Kluźniak, W / Komin, Nu / Konno, R / Kosack, K / Kostunin, D / Le Stum, S / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leuschner, F / Lohse, T / Luashvili, A / Lypova, I / Mackey, J / Malyshev, D / Marandon, V / Marchegiani, P / Marcowith, A / Martí-Devesa, G / Marx, R / Maurin, G / Meyer, M / Mitchell, A / Moderski, R / Mohrmann, L / Montanari, A / Moulin, E / Muller, J / Murach, T / Nakashima, K / de Naurois, M / Nayerhoda, A / Niemiec, J / Priyana Noel, A / O'Brien, P / Ohm, S / Olivera-Nieto, L / de Ona Wilhelmi, E / Ostrowski, M / Panny, S / Panter, M / Parsons, R D / Peron, G / Pita, S / Poireau, V / Prokhorov, D A / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Reichherzer, P / Reimer, A / Reimer, O / Renaud, M / Reville, B / Rieger, F / Rowell, G / Rudak, B / Rueda Ricarte, H / Ruiz-Velasco, E / Sahakian, V / Sailer, S / Salzmann, H / Sanchez, D A / Santangelo, A / Sasaki, M / Schäfer, J / Schüssler, F / Schutte, H M / Schwanke, U / Senniappan, M / Shapopi, J N S / Simoni, R / Sinha, A / Sol, H / Specovius, A / Spencer, S / Stawarz, Ł / Steinmassl, S / Steppa, C / Takahashi, T / Tanaka, T / Taylor, A M / Terrier, R / Thorpe-Morgan, C / Tsirou, M / Tsuji, N / Tuffs, R / Uchiyama, Y / Unbehaun, T / van Eldik, C / van Soelen, B / Veh, J / Venter, C / Vink, J / Wagner, S J / Werner, F / White, R / Wierzcholska, A / Wong, Yu Wun / Yusafzai, A / Zacharias, M / Zargaryan, D / Zdziarski, A A / Zech, A / Zhu, S J / Zouari, S / Żywucka, N

    Science (New York, N.Y.)

    2022  Volume 376, Issue 6588, Page(s) 77–80

    Abstract: Recurrent novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated when ejected material slams into the companion star's wind can accelerate ... ...

    Abstract Recurrent novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated when ejected material slams into the companion star's wind can accelerate particles. We report very-high-energy (VHE; [Formula: see text]) gamma rays from the recurrent nova RS Ophiuchi, up to 1 month after its 2021 outburst, observed using the High Energy Stereoscopic System (H.E.S.S.). The temporal profile of VHE emission is similar to that of lower-energy giga-electron volt emission, indicating a common origin, with a 2-day delay in peak flux. These observations constrain models of time-dependent particle energization, favoring a hadronic emission scenario over the leptonic alternative. Shocks in dense winds provide favorable environments for efficient acceleration of cosmic rays to very high energies.
    Language English
    Publishing date 2022-03-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abn0567
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow.

    Abdalla, H / Aharonian, F / Ait Benkhali, F / Angüner, E O / 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 / Bi, B / Bissaldi, E / Böttcher, M /
    Boisson, C / Bolmont, J / de Bony de Lavergne, M / Breuhaus, M / 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 / Damascene Mbarubucyeye, J / Davids, I D / Davies, J / Deil, C / Devin, J / Dirson, L / Djannati-Ataï, A / Dmytriiev, A / Donath, A / Doroshenko, V / Dreyer, L / Duffy, C / Dyks, J / Egberts, K / Eichhorn, F / Einecke, S / Emery, G / Ernenwein, J-P / Feijen, K / Fegan, S / Fiasson, A / Fichet de Clairfontaine, G / Fontaine, G / Funk, S / Füßling, M / Gabici, S / Gallant, Y A / Giavitto, G / Giunti, L / Glawion, D / Glicenstein, J F / 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 / Jamrozy, M / Jankowsky, D / Jankowsky, F / Jardin-Blicq, A / Joshi, V / Jung-Richardt, I / Kasai, E / Kastendieck, M A / Katarzyński, K / 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 / Leuschner, F / Levy, C / Lohse, T / Lypova, I / Mackey, J / Majumdar, J / Malyshev, D / Marandon, V / Marchegiani, P / Marcowith, A / Mares, A / Martí-Devesa, G / Marx, R / Maurin, G / Meintjes, P J / Meyer, M / Mitchell, A / Moderski, R / Mohrmann, L / Montanari, A / Moore, C / Morris, P / Moulin, E / Muller, J / Murach, T / Nakashima, K / Nayerhoda, A / de Naurois, M / Ndiyavala, H / Niemiec, J / Oakes, L / O'Brien, P / Odaka, H / Ohm, S / Olivera-Nieto, L / de Ona Wilhelmi, E / Ostrowski, M / Panny, S / Panter, M / Parsons, R D / Peron, G / Peyaud, B / Piel, Q / Pita, S / Poireau, V / Priyana Noel, A / Prokhorov, D A / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Rauth, R / Reichherzer, P / 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 / Salzmann, H / Sanchez, D A / Santangelo, A / Sasaki, M / Scalici, M / Schäfer, J / Schüssler, F / Schutte, H M / Schwanke, U / Seglar-Arroyo, M / Senniappan, M / Seyffert, A S / Shafi, N / Shapopi, J N S / Shiningayamwe, K / Simoni, R / Sinha, A / Sol, H / Specovius, A / Spencer, S / Spir-Jacob, M / Stawarz, Ł / Sun, L / Steenkamp, R / Stegmann, C / Steinmassl, S / Steppa, C / Takahashi, T / Tam, T / Tavernier, T / Taylor, A M / Terrier, R / Thiersen, J H E / Tiziani, D / Tluczykont, M / Tomankova, L / Tsirou, M / Tuffs, R / Uchiyama, Y / van der Walt, D J / van Eldik, C / van Rensburg, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Vincent, P / Vink, J / Völk, H J / Wadiasingh, Z / Wagner, S J / Watson, J / Werner, F / White, R / Wierzcholska, A / Wong, Yu Wun / Yusafzai, A / Zacharias, M / Zanin, R / Zargaryan, D / Zdziarski, A A / Zech, A / Zhu, S J / Zorn, J / Zouari, S / Żywucka, N / Evans, P / Page, K

    Science (New York, N.Y.)

    2021  Volume 372, Issue 6546, Page(s) 1081–1085

    Abstract: Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events. We report the detection of very-high-energy (VHE) gamma rays from the ... ...

    Abstract Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events. We report the detection of very-high-energy (VHE) gamma rays from the afterglow of GRB 190829A, between 4 and 56 hours after the trigger, using the High Energy Stereoscopic System (H.E.S.S.). The low luminosity and redshift of GRB 190829A reduce both internal and external absorption, allowing determination of its intrinsic energy spectrum. Between energies of 0.18 and 3.3 tera-electron volts, this spectrum is described by a power law with photon index of 2.07 ± 0.09, similar to the x-ray spectrum. The x-ray and VHE gamma-ray light curves also show similar decay profiles. These similar characteristics in the x-ray and gamma-ray bands challenge GRB afterglow emission scenarios.
    Language English
    Publishing date 2021-05-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abe8560
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: A very-high-energy component deep in the γ-ray burst afterglow.

    Abdalla, H / Adam, R / Aharonian, F / Ait Benkhali, F / Angüner, E O / Arakawa, M / Arcaro, C / Armand, C / Ashkar, H / Backes, M / Barbosa Martins, V / Barnard, M / Becherini, Y / Berge, D / Bernlöhr, K / Bissaldi, E / Blackwell, R / Böttcher, M / Boisson, C /
    Bolmont, J / Bonnefoy, S / Bregeon, J / Breuhaus, M / Brun, F / Brun, P / Bryan, M / Büchele, M / Bulik, T / Bylund, T / Capasso, M / Caroff, S / Carosi, A / Casanova, S / Cerruti, M / Chand, T / Chandra, S / Chen, A / Colafrancesco, S / Curyło, M / Davids, I D / Deil, C / Devin, J / deWilt, P / Dirson, L / Djannati-Ataï, A / Dmytriiev, A / Donath, A / Doroshenko, V / Dyks, J / Egberts, K / Emery, G / Ernenwein, J-P / Eschbach, S / Feijen, K / Fegan, S / Fiasson, A / Fontaine, G / Funk, S / Füßling, M / Gabici, S / Gallant, Y A / Gaté, F / Giavitto, G / Giunti, L / Glawion, D / Glicenstein, J F / Gottschall, D / Grondin, M-H / Hahn, J / Haupt, M / Heinzelmann, G / Henri, G / Hermann, G / Hinton, J A / Hofmann, W / Hoischen, C / Holch, T L / Holler, M / Horns, D / Huber, D / Iwasaki, H / Jamrozy, M / Jankowsky, D / Jankowsky, F / Jardin-Blicq, A / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katsuragawa, M / Katz, U / Khangulyan, D / Khélifi, B / King, J / Klepser, S / Kluźniak, W / Komin, Nu / 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 / Marandon, V / Marcowith, A / Mares, A / Mariaud, C / Martí-Devesa, G / Marx, R / Maurin, G / Meintjes, P J / Mitchell, A M W / Moderski, R / Mohamed, M / Mohrmann, L / Moore, C / Moulin, E / Muller, J / Murach, T / 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 / Oya, I / Panter, M / Parsons, R D / Perennes, C / Petrucci, P-O / Peyaud, B / Piel, Q / Pita, S / Poireau, V / Priyana Noel, A / 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 / Schlickeiser, R / Schüssler, F / Schulz, A / Schutte, 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 / Spir-Jacob, M / Stawarz, Ł / Steenkamp, R / Stegmann, C / Steppa, C / Takahashi, T / Tavernier, T / Taylor, A M / Terrier, R / Tiziani, D / Tluczykont, M / 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 / Vincent, P / Vink, J / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / White, R / Wierzcholska, A / Yang, R / Yoneda, H / Zacharias, M / Zanin, R / Zdziarski, A A / Zech, A / Ziegler, A / Zorn, J / Żywucka, N / de Palma, F / Axelsson, M / Roberts, O J

    Nature

    2019  Volume 575, Issue 7783, Page(s) 464–467

    Abstract: Gamma-ray bursts (GRBs) are brief flashes of γ-rays and are considered to be the most energetic explosive phenomena in the ... ...

    Abstract Gamma-ray bursts (GRBs) are brief flashes of γ-rays and are considered to be the most energetic explosive phenomena in the Universe
    Language English
    Publishing date 2019-11-20
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-019-1743-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Search for γ-Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

    Abdallah, H / Abramowski, A / Aharonian, F / Ait Benkhali, F / Angüner, E O / Arakawa, M / Arrieta, M / Aubert, P / Backes, M / Balzer, A / Barnard, M / Becherini, Y / Becker Tjus, J / 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 / Capasso, M / Caroff, S / Carosi, A / Carr, J / Casanova, S / Cerruti, M / Chakraborty, N / Chaves, R C G / Chen, A / Chevalier, J / Colafrancesco, S / Condon, B / Conrad, J / Davids, I D / Decock, J / Deil, C / Devin, J / deWilt, P / Dirson, L / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dutson, K / Dyks, J / Edwards, T / Egberts, K / Eger, P / Emery, G / Ernenwein, J-P / Eschbach, S / Farnier, C / Fegan, S / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Funk, S / Füßling, M / Gabici, S / Gallant, Y A / Garrigoux, T / Gaté, F / Giavitto, G / Giebels, B / Glawion, D / Glicenstein, J F / Gottschall, D / Grondin, M-H / Hahn, J / Haupt, M / Hawkes, J / Heinzelmann, G / Henri, G / Hermann, G / Hinton, J A / Hofmann, W / Hoischen, C / Holch, T L / Holler, M / Horns, D / Ivascenko, A / Iwasaki, H / Jacholkowska, A / Jamrozy, M / Janiak, M / Jankowsky, D / Jankowsky, F / Jingo, M / Jouvin, L / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katsuragawa, M / Katz, U / Kerszberg, D / Khangulyan, D / Khélifi, B / King, J / Klepser, S / Klochkov, D / Kluźniak, W / Komin, Nu / Kosack, K / Krakau, S / Kraus, M / Krüger, P P / Laffon, H / Lamanna, G / Lau, J / Lees, J-P / Lefaucheur, J / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leser, E / Liu, R / Lohse, T / Lorentz, M / López-Coto, R / Lypova, I / Malyshev, D / Marandon, V / Marcowith, A / Mariaud, C / Marx, R / Maurin, G / Maxted, N / Mayer, M / Meintjes, P J / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Mohrmann, L / Morå, K / 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, R D / Pekeur, N W / Pelletier, G / Perennes, C / Petrucci, P-O / Peyaud, B / Piel, Q / Pita, S / Poireau, V / Poon, H / Prokhorov, D / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Rauth, R / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Rinchiuso, L / Romoli, C / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Saito, S / Sanchez, D A / Santangelo, A / Sasaki, M / Schandri, M / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwemmer, S / Seglar-Arroyo, M / Settimo, M / Seyffert, A S / Shafi, N / Shilon, I / Shiningayamwe, K / Simoni, R / Sol, H / Spanier, F / Spir-Jacob, M / Stawarz, Ł / Steenkamp, R / Stegmann, C / Steppa, C / Sushch, I / Takahashi, T / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tibaldo, L / Tiziani, D / Tluczykont, M / Trichard, C / Tsirou, M / Tsuji, N / Tuffs, R / Uchiyama, Y / van der Walt, J / van Eldik, C / van Rensburg, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Voisin, F / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / Wagner, P / Wagner, R M / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zaborov, D / Zacharias, M / Zanin, R / Zdziarski, A A / Zech, A / Zefi, F / Ziegler, A / Zorn, J / Żywucka, N

    Physical review letters

    2018  Volume 120, Issue 20, Page(s) 201101

    Abstract: Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. ...

    Abstract Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. We report on a search for a monoenergetic spectral line from self-annihilations of DM particles in the energy range from 300 GeV to 70 TeV using a two-dimensional maximum likelihood method taking advantage of both the spectral and spatial features of the signal versus background. The analysis makes use of Galactic center observations accumulated over ten years (2004-2014) with the H.E.S.S. array of ground-based Cherenkov telescopes. No significant γ-ray excess above the background is found. We derive upper limits on the annihilation cross section ⟨σv⟩ for monoenergetic DM lines at the level of 4×10^{-28}  cm^{3} s^{-1} at 1 TeV, assuming an Einasto DM profile for the Milky Way halo. For a DM mass of 1 TeV, they improve over the previous ones by a factor of 6. The present constraints are the strongest obtained so far for DM particles in the mass range 300 GeV-70 TeV. Ground-based γ-ray observations have reached sufficient sensitivity to explore relevant velocity-averaged cross sections for DM annihilation into two γ-ray photons at the level expected from the thermal relic density for TeV DM particles.
    Language English
    Publishing date 2018-05-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.120.201101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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