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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with H.E.S.S.
Astronomy and Astrophysics, Volume 612, Article A9, Year 2018
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Description
The diffuse very high-energy (VHE; >100 GeV) γ-ray emission observed in the central 200 pc of the Milky Way by H.E.S.S. was found to follow dense matter distribution in the central molecular zone (CMZ) up to a longitudinal distance of about 130 pc to the Galactic centre (GC), where the flux rapidly decreases. This was initially interpreted as the result of a burst-like injection of energetic particles 104 yr ago, but a recent more sensitive H.E.S.S. analysis revealed that the cosmic-ray (CR) density profile drops with the distance to the centre, making data compatible with a steady cosmic PeVatron at the GC. In this paper, we extend this analysis to obtain, for the first time, a detailed characterisation of the correlation with matter and to search for additional features and individual γ-ray sources in the inner 200 pc. Taking advantage of 250 h of H.E.S.S. data and improved analysis techniques, we perform a detailed morphology study of the diffuse VHE emission observed from the GC ridge and reconstruct its total spectrum. To test the various contributions to the total γ-ray emission, we used an iterative 2D maximum-likelihood approach that allows us to build a phenomenological model of the emission by summing a number of different spatial components. We show that the emission correlated with dense matter covers the full CMZ and that its flux is about half the total diffuse emission flux. We also detect some emission at higher latitude that is likely produced by hadronic collisions of CRs in less dense regions of the GC interstellar medium. We detect an additional emission component centred on the GC and extending over about 15 pc that is consistent with the existence of a strong CR density gradient and confirms the presence of a CR accelerator at the very centre of our Galaxy. We show that the spectrum of full ridge diffuse emission is compatible with that previously derived from the central regions, suggesting that a single population of particles fills the entire CMZ. Finally, we report the discovery of a VHE γ-ray source near the GC radio arc and argue that it is produced by the pulsar wind nebula candidate G0.13-0.11. © 2018 ESO.
Authors & Co-Authors
Abdalla, Hassan
South Africa, Potchefstroom
North-west University
Abramowski, Attila
Germany, Hamburg
Universität Hamburg
Aharonian, F. A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Benkhali, Faical Ait
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Akhperjanian, Ashot G.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Andersson, T.
Sweden, Vaxjo
Linnaeus University, Växjö
Angüner, Ekrem Oǧuzhan
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Arakawa, Masanori
Japan, Tokyo
Rikkyo University
Arrieta, M.
France, Paris
Université Psl
Aubert, Pierre
France, Chambery
Université Savoie Mont Blanc
Backes, Michael
Namibia, Windhoek
University of Namibia
Balzer, Arnim
Netherlands, Amsterdam
Universiteit Van Amsterdam
Barnard, Monica A.
South Africa, Potchefstroom
North-west University
Becherini, Yvonne
Sweden, Vaxjo
Linnaeus University, Växjö
Becker-Tjus, Julia
Germany, Bochum
Ruhr-universitat Bochum
Berge, David
Netherlands, Amsterdam
Fom-institute of Subatomic Physics - Nikhef
Bernhard, Sabrina
Austria, Innsbruck
Universität Innsbruck
Bernlöhr, Konrad
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Blackwell, Rebecca
Australia, Adelaide
The University of Adelaide
Boettcher, M.
South Africa, Potchefstroom
North-west University
Boisson, Catherine
France, Paris
Université Psl
Bolmont, Julien
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Bonnefoy, Simon
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Bordas, Pol
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Bregeon, Johan
France, Montpellier
Université de Montpellier
Brun, François
France, Paris
Cnrs Centre National de la Recherche Scientifique
Brun, Pierre
France, Gif-sur-yvette
Cea Saclay
Bryan, Marta L.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Büchele, Matthias
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Bulk, Tomasz
Poland, Warsaw
University of Warsaw
Capasso, Massimo
Germany, Tubingen
Eberhard Karls Universität Tübingen
Carr, John S.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Casanova, Sabrina
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Cerruti, Matteo
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Chakraborty, Nachiketa
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Chaves, Ryan C.G.
France, Montpellier
Université de Montpellier
South Africa
Marie Curie
Chen, Andrew W.
South Africa, Johannesburg
University of the Witwatersrand
Chevalier, Jill
France, Chambery
Université Savoie Mont Blanc
Coffaro, Martina
Germany, Tubingen
Eberhard Karls Universität Tübingen
Colafrancesco, Sergio
South Africa, Johannesburg
University of the Witwatersrand
Cologna, Gabriele
Germany, Heidelberg
Universität Heidelberg
Condon, Benjamin
France, Paris
Cnrs Centre National de la Recherche Scientifique
Conrad, Jan
Sweden, Stockholm
Albanova Universitetscentrum
Sweden, Uppsala
Wallenberg Academy Fellow
Cui, Yudong
Germany, Tubingen
Eberhard Karls Universität Tübingen
Davids, Isak Delberth
South Africa, Potchefstroom
North-west University
Namibia, Windhoek
University of Namibia
Decock, J.
France, Gif-sur-yvette
Cea Saclay
Degrange, Bernard
France, Palaiseau
École Polytechnique
Deil, Christoph
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Devin, Justine
France, Montpellier
Université de Montpellier
DeWilt, P.
Australia, Adelaide
The University of Adelaide
Dirson, Ludmilla
Germany, Hamburg
Universität Hamburg
Djannati-Ataï, Arache
France, Paris
L'observatoire de Paris
Domainko, Wilfried F.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Donath, Axel
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Drury, L. O.C.
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Dutson, Kate L.
United Kingdom, Leicester
University of Leicester
Dyks, Jarosław
Poland, Warszawa
Polish Academy of Sciences
Egberts, Kathrin
Germany, Potsdam
Universität Potsdam
Eger, Peter A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ernenwein, Jean Pierre
France, Paris
Cnrs Centre National de la Recherche Scientifique
Eschbach, Stefan
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Farnier, Christian
Sweden, Stockholm
Albanova Universitetscentrum
Fegan, Stephen J.
France, Palaiseau
École Polytechnique
Fernandes, Milton Virgílio
Germany, Hamburg
Universität Hamburg
Fiasson, Armand
France, Chambery
Université Savoie Mont Blanc
Fontaine, Gérard
France, Palaiseau
École Polytechnique
Förster, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Funk, Stefan
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Füssling, Matthias
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Gabici, Stefano
France, Paris
L'observatoire de Paris
Gallant, Yves A.
France, Montpellier
Université de Montpellier
Garrigoux, Tania
South Africa, Potchefstroom
North-west University
Giavitto, Gianluca
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Giebels, Berrie
France, Palaiseau
École Polytechnique
Glicenstein, Jean François
France, Gif-sur-yvette
Cea Saclay
Gottschall, Daniel
Germany, Tubingen
Eberhard Karls Universität Tübingen
Goyal, Arti
Poland, Krakow
Uniwersytet Jagielloński
Grondin, Marie Hélène
France, Paris
Cnrs Centre National de la Recherche Scientifique
Hahn, Joachim
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Haupt, Maria
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Hawkes, Jarryd
Australia, Adelaide
The University of Adelaide
Heinzelmann, Götz
Germany, Hamburg
Universität Hamburg
Henri, Gilles
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Hermann, German
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hinton, James A.J.A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hofmann, Werner
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hoischen, Clemens
Germany, Potsdam
Universität Potsdam
Holch, T. L.
Germany, Berlin
Humboldt-universität zu Berlin
Holler, Markus
Austria, Innsbruck
Universität Innsbruck
Horns, Dieter
Germany, Hamburg
Universität Hamburg
Ivascenko, Alex
South Africa, Potchefstroom
North-west University
Iwasaki, Hiroyoshi
Japan, Tokyo
Rikkyo University
Jachołkowska, Agnieszka
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Jamrozy, Marek
Poland, Krakow
Uniwersytet Jagielloński
Janiak, Mateusz
Poland, Warszawa
Polish Academy of Sciences
Jankowsky, David
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Jankowsky, Felix
Germany, Heidelberg
Universität Heidelberg
Jingo, Maxwell
South Africa, Johannesburg
University of the Witwatersrand
Jogler, Tobias
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Jouvin, Léa
France, Paris
L'observatoire de Paris
Jung-Richardt, Ira V.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kastendieck, Max Anton
Germany, Hamburg
Universität Hamburg
Katarzyński, Krzysztof
Poland, Torun
Uniwersytet Mikołaja Kopernika w Toruniu
Katsuragawa, Miho
Japan, Chofu
Japan Aerospace Exploration Agency
Katz, Ulrich F.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kerszberg, Daniel
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Khangulyan, D.
Japan, Tokyo
Rikkyo University
Khélifi, Bruno
France, Paris
L'observatoire de Paris
King, Johannes
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Klepser, Stefan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Klochkov, Dmitry K.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Klužniak, Wlodzimierz
Poland, Warszawa
Polish Academy of Sciences
Kolitzus, D.
Austria, Innsbruck
Universität Innsbruck
Komin, Nukri
South Africa, Johannesburg
University of the Witwatersrand
Kosack, Karl
France, Gif-sur-yvette
Cea Saclay
Krakau, S.
Germany, Bochum
Ruhr-universitat Bochum
Krüger, P. P.
South Africa, Potchefstroom
North-west University
Laffon, Hélène
France, Paris
Cnrs Centre National de la Recherche Scientifique
Lamanna, Giovanni
France, Chambery
Université Savoie Mont Blanc
Lau, James C.
Australia, Adelaide
The University of Adelaide
Lees, Jean Pierre
France, Chambery
Université Savoie Mont Blanc
Lefranc, Valentin
France, Gif-sur-yvette
Cea Saclay
Lemière, Anne
France, Paris
L'observatoire de Paris
Lemoine-Goumard, Marianne
France, Paris
Cnrs Centre National de la Recherche Scientifique
Lenain, Jean Philippe
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Lohse, Thomas
Germany, Berlin
Humboldt-universität zu Berlin
Liu, Ruoyu
Germany, Heidelberg
Max-planck-institut Für Kernphysik
López-Coto, Rubén
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Lypova, Iryna
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Marandon, Vincent
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Marcowith, Alexandre
France, Montpellier
Université de Montpellier
Marx, Ramin
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Maurin, Guillaume T.
France, Chambery
Université Savoie Mont Blanc
Maxted, Nigel I.
Australia, Adelaide
The University of Adelaide
Australia, Sydney
Unsw Sydney
Mayer, Michael
Germany, Berlin
Humboldt-universität zu Berlin
Meintjes, Pieter J.
South Africa, Bloemfontein
University of the Free State
Meyer, Manuel S.
Sweden, Stockholm
Albanova Universitetscentrum
Mitchell, Alison M.W.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Moderski, Rafaƚ
Poland, Warszawa
Polish Academy of Sciences
Mohamed, Mahmoud
Germany, Heidelberg
Universität Heidelberg
Mohrmann, Lars
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Mora, Karen Salomé Caballero
Sweden, Stockholm
Albanova Universitetscentrum
Moulin, E.
France, Gif-sur-yvette
Cea Saclay
Murach, Thomas
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Niemiec, Jacek
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
O'Brien, Paul T.
United Kingdom, Leicester
University of Leicester
Ohm, Stefan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Oya, Igor
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Padovani, Marco
France, Montpellier
Université de Montpellier
Panter, M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Parsons, Robert Daniel
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Pekeur, Nikki W.
South Africa, Potchefstroom
North-west University
Pelletier, Guy
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Petrucci, Pierre Olivier
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Pita, Santiago
France, Paris
L'observatoire de Paris
Poon, Helen
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Prokhorov, Dmitry A.
Sweden, Vaxjo
Linnaeus University, Växjö
Prokoph, Heike
Netherlands, Amsterdam
Fom-institute of Subatomic Physics - Nikhef
Pûhlhofer, Gerd
Germany, Tubingen
Eberhard Karls Universität Tübingen
Punch, Michael
Sweden, Vaxjo
Linnaeus University, Växjö
France, Paris
L'observatoire de Paris
Quirrenbach, Andreas
Germany, Heidelberg
Universität Heidelberg
Reimer, Anita
Austria, Innsbruck
Universität Innsbruck
Reimer, Olaf
Austria, Innsbruck
Universität Innsbruck
Renaud, Matthieu
France, Montpellier
Université de Montpellier
Richter, Stephan
South Africa, Potchefstroom
North-west University
Rieger, Frank M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Australia, Adelaide
The University of Adelaide
Rowell, Gavin P.
Australia, Adelaide
The University of Adelaide
Rudak, Bronisław
Poland, Warszawa
Polish Academy of Sciences
Sahakian, Vardan H.
Armenia, Yerevan
Yerevan Physics Institute
Šálek, David
Netherlands, Amsterdam
Fom-institute of Subatomic Physics - Nikhef
Sánchez, David A.
France, Chambery
Université Savoie Mont Blanc
Santangelo, Andrea E.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Sasaki, Manami
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Schüssler, Fabian
France, Gif-sur-yvette
Cea Saclay
Schwanke, Ullrich
Germany, Berlin
Humboldt-universität zu Berlin
Seyffert, Albertus S.
South Africa, Potchefstroom
North-west University
Shafi, Nebiha
South Africa, Johannesburg
University of the Witwatersrand
Shilon, Idan
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Sol, Hélène
France, Paris
Université Psl
Spanier, Felix
South Africa, Potchefstroom
North-west University
Spengler, Gerrit
Sweden, Stockholm
Albanova Universitetscentrum
Steenkamp, R.
Namibia, Windhoek
University of Namibia
Stegmann, Christian
Germany, Potsdam
Universität Potsdam
Sushch, Iurii
South Africa, Potchefstroom
North-west University
Takahashi, Tadayuki
Japan, Chofu
Japan Aerospace Exploration Agency
Tavernet, Jean Paul
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Terrier, Régis
France, Paris
L'observatoire de Paris
Tibaldo, Luigi
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Tluczykont, Martin
Germany, Hamburg
Universität Hamburg
Tuffs, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Uchiyama, Yasunobu
Japan, Tokyo
Rikkyo University
van der Walt, D. J.
South Africa, Potchefstroom
North-west University
Vasileiadis, Georges
France, Montpellier
Université de Montpellier
Venter, C.
South Africa, Potchefstroom
North-west University
Viana, Aion A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Vincent, P.
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Vink, Jacco S.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Voisin, Fabien J.
Australia, Adelaide
The University of Adelaide
Völk, Heinrich J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Wadiasingh, Zorawar
South Africa, Potchefstroom
North-west University
Wagner, Stefan J.
Germany, Heidelberg
Universität Heidelberg
Wagner, Philipp
Germany, Berlin
Humboldt-universität zu Berlin
White, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Wierzcholska, Alicja
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Wouters, Denis
France, Gif-sur-yvette
Cea Saclay
Yang, Ruizhi
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Zaborov, Dmitry N.
France, Palaiseau
École Polytechnique
Zacharias, Michael
South Africa, Potchefstroom
North-west University
Zanin, Roberta
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Zdziarski, Andrzej A.
Poland, Warszawa
Polish Academy of Sciences
Zech, Andreas
France, Paris
Université Psl
Statistics
Citations: 49
Authors: 211
Affiliations: 42
Identifiers
Doi:
10.1051/0004-6361/201730824
ISSN:
00046361
Research Areas
Environmental
Study Design
Cross Sectional Study
Cohort Study
Phenomenological Study
Study Approach
Qualitative