Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with HESS

Abdalla, H.; Abramowski, A.; Aharonian, F.; Benkhali, F. Ait; Akhperjanian, A. G.; Andersson, Tom; Angüner, E. O.; Arakawa, M.; Arrieta, M.; Aubert, P.; Backes, M.; Balzer, A.; Barnard, M.; Becherini, Yvonne; Tjus, J. Becker; Berge, D.; Bernhard, S.; Bernloehr, K.; Blackwell, R.; Boettcher, M.; Boisson, C.; Bolmont, J.; Bonnefoy, S.; Bordas, P.; Bregeon, J.; Brun, F.; Brun, P.; Bryan, M.; Buechele, M.; Bulik, T.; Capasso, M.; Carr, J.; Casanova, S.; Cerruti, M.; Chakraborty, N.; Chaves, R. C. G.; Chen, A.; Chevalier, J.; Coffaro, M.; Colafrancesco, S.; Cologna, G.; Condon, B.; Conrad, J.; Cui, Y.; Davids, I. D.; Decock, J.; Degrange, B.; Deil, C.; Devin, J.; deWilt, P.; Dirson, L.; Djannati-Atai, A.; Domainko, W.; Donath, A.; Drury, L. O 'C.; Dutson, K.; Dyks, J.; Edwards, T.; Egberts, K.; Eger, P.; Ernenwein, J. -P; Eschbach, S.; Farnier, Christian; Fegan, S.; Fernandes, M. V.; Fiasson, A.; Fontaine, G.; Foerster, A.; Funk, S.; Fuessling, M.; Gabici, S.; Gallant, Y. A.; Garrigoux, T.; Giavitto, G.; Giebels, B.; Glicenstein, J. F.; Gottschall, D.; Goyal, A.; 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.; Jogler, T.; Jouvin, L.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzynski, K.; Katsuragawa, M.; Katz, U.; Kerszberg, D.; Khangulyan, D.; Khelifi, B.; King, J.; Klepser, S.; Klochkov, D.; Kluzniak, W.; Kolitzus, D.; Komin, Nu.; Kosack, K.; Krakau, S.; Kraus, M.; Krueger, P. P.; Laffon, H.; Lamanna, G.; Lau, J.; Lees, J. -P; Lefaucheur, J.; Lefranc, V.; Lemiere, A.; Lemoine-Goumard, M.; Lenain, J. -P; Leser, E.; Lohse, T.; Lorentz, M.; Liu, R.; Lopez-Coto, R.; Lypova, I.; 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.; Mora, K.; Moulin, E.; Murach, T.; Nakashima, S.; de Naurois, M.; 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.; Poon, H.; Prokhorov, Dmitry; Prokoph, H.; Puehlhofer, G.; Punch, Michael; Quirrenbach, A.; Raab, S.; Rauth, R.; Reimer, A.; Reimer, O.; Renaud, M.; de los Reyes, R.; Richter, S.; Rieger, F.; Romoli, C.; Rowell, G.; Rudak, B.; Rulten, C. B.; Sahakian, V.; Saito, S.; Salek, D.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Schlickeiser, R.; Schuessler, F.; Schulz, A.; Schwanke, U.; Schwemmer, S.; Seglar-Arroyo, M.; Settimo, M.; Seyffert, A. S.; Shafi, N.; Shilon, I.; Simoni, R.; Sol, H.; Spanier, F.; Spengler, G.; Spies, F.; Stawarz, L.; Steenkamp, R.; Stegmann, C.; Stycz, K.; Sushch, I.; Takahashi, T.; Tavernet, J. -P; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tibaldo, L.; Tiziani, D.; Tluczykont, M.; Trichard, C.; Tsuji, N.; Tuffs, R.; Uchiyama, Y.; van der Walt, D. J.; van Eldik, C.; van Rensburg, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venters, C.; Viana, A.; Vincent, P.; Vink, J.; Voisin, F.; Voelk, H. J.; Vuillaume, T.; Wadiasingh, Z.; Wagner, S. J.; Wagner, P.; Wagner, R. M.; White, R.; Wierzcholska, A.; Willmann, P.; Woernlein, A.; Wouters, D.; Yang, R.; Zaborov, D.; Zacharias, M.; Zanin, R.; Zdziarski, A. A.; Zech, A.; Zefi, F.; Ziegler, A.; Zywucka, N.

lnu.sePublications

Planned maintenance

A system upgrade is planned for 10/12-2024, at 12:00-13:00. During this time DiVA will be unavailable.

Simple search

Advanced search -
Research publications Advanced search -
Student theses Statistics

English Svenska Norsk

Change search

Cite ExportLink to record

Permanent link

https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76467

Direct link

http://lnu.diva-portal.org/smash/record.jsf?pid=diva2:1232114

Cite

Citation style

apa
ieee
modern-language-association-8th-edition
vancouver
Other style

More styles

Language

de-DE
en-GB
en-US
fi-FI
nn-NO
nn-NB
sv-SE
Other locale

More languages

Output format

html
text
asciidoc
rtf

Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with HESS

Abdalla, H.

North-West University, South Africa.

Abramowski, A.

University of Hamburg, Germany.

Aharonian, F.

Max Planck Institute for Nuclear Physics, Germany ; Dublin Institute for Advanced Studies, Ireland ; National Academy of Sciences of the Republic of Armenia, Armenia.

Benkhali, F. Ait

Max Planck Institute for Nuclear Physics, Germany.

Akhperjanian, A. G.

Andersson, Tom

Angüner, E. O.

Arakawa, M.

Arrieta, M.

Aubert, P.

Backes, M.

Balzer, A.

Barnard, M.

Becherini, Yvonne

Tjus, J. Becker

Berge, D.

Bernhard, S.

Bernloehr, K.

Blackwell, R.

Boettcher, M.

Boisson, C.

Bolmont, J.

Bonnefoy, S.

Bordas, P.

Bregeon, J.

Brun, F.

Brun, P.

Bryan, M.

Buechele, M.

Bulik, T.

Capasso, M.

Carr, J.

Casanova, S.

Cerruti, M.

Chakraborty, N.

Chaves, R. C. G.

Chen, A.

Chevalier, J.

Coffaro, M.

Colafrancesco, S.

Cologna, G.

Condon, B.

Conrad, J.

Cui, Y.

Davids, I. D.

Decock, J.

Degrange, B.

Deil, C.

Devin, J.

deWilt, P.

Dirson, L.

Djannati-Atai, A.

Domainko, W.

Donath, A.

Drury, L. O 'C.

Dutson, K.

Dyks, J.

Edwards, T.

Egberts, K.

Eger, P.

Ernenwein, J. -P

Eschbach, S.

Farnier, Christian

Fegan, S.

Fernandes, M. V.

Fiasson, A.

Fontaine, G.

Foerster, A.

Funk, S.

Fuessling, M.

Gabici, S.

Gallant, Y. A.

Garrigoux, T.

Giavitto, G.

Giebels, B.

Glicenstein, J. F.

Gottschall, D.

Goyal, A.

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.

Jogler, T.

Jouvin, L.

Jung-Richardt, I.

Kastendieck, M. A.

Katarzynski, K.

Katsuragawa, M.

Katz, U.

Kerszberg, D.

Khangulyan, D.

Khelifi, B.

King, J.

Klepser, S.

Klochkov, D.

Kluzniak, W.

Kolitzus, D.

Komin, Nu.

Kosack, K.

Krakau, S.

Kraus, M.

Krueger, P. P.

Laffon, H.

Lamanna, G.

Lau, J.

Lees, J. -P

Lefaucheur, J.

Lefranc, V.

Lemiere, A.

Lemoine-Goumard, M.

Lenain, J. -P

Leser, E.

Lohse, T.

Lorentz, M.

Liu, R.

Lopez-Coto, R.

Lypova, I.

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.

Mora, K.

Moulin, E.

Murach, T.

Nakashima, S.

de Naurois, M.

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.

Poon, H.

Prokhorov, Dmitry

Prokoph, H.

Puehlhofer, G.

Punch, Michael

Quirrenbach, A.

Raab, S.

Rauth, R.

Reimer, A.

Reimer, O.

Renaud, M.

de los Reyes, R.

Richter, S.

Rieger, F.

Romoli, C.

Rowell, G.

Rudak, B.

Rulten, C. B.

Sahakian, V.

Saito, S.

Salek, D.

Sanchez, D. A.

Santangelo, A.

Sasaki, M.

Schlickeiser, R.

Schuessler, F.

Schulz, A.

Schwanke, U.

Schwemmer, S.

Seglar-Arroyo, M.

Settimo, M.

Seyffert, A. S.

Shafi, N.

Shilon, I.

Simoni, R.

Sol, H.

Spanier, F.

Spengler, G.

Spies, F.

Stawarz, L.

Steenkamp, R.

Stegmann, C.

Stycz, K.

Sushch, I.

Takahashi, T.

Tavernet, J. -P

Tavernier, T.

Taylor, A. M.

Terrier, R.

Tibaldo, L.

Tiziani, D.

Tluczykont, M.

Trichard, C.

Tsuji, N.

Tuffs, R.

Uchiyama, Y.

van der Walt, D. J.

van Eldik, C.

van Rensburg, C.

van Soelen, B.

Vasileiadis, G.

Veh, J.

Venters, C.

Viana, A.

Vincent, P.

Vink, J.

Voisin, F.

Voelk, H. J.

Vuillaume, T.

Wadiasingh, Z.

Wagner, S. J.

Wagner, P.

Wagner, R. M.

White, R.

Wierzcholska, A.

Willmann, P.

Woernlein, A.

Wouters, D.

Yang, R.

Zaborov, D.

Zacharias, M.

Zanin, R.

Zdziarski, A. A.

Zech, A.

Zefi, F.

Ziegler, A.

Zywucka, N.

Show others and affiliations

2018 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 612, article id A9Article in journal (Refereed) Published

Abstract [en]

The diffuse very high-energy (VHE; > 100 GeV) gamma-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 gamma-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 gamma-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 gamma-ray source near the GC radio arc and argue that it is produced by the pulsar wind nebula candidate G0.13-0.11.

Place, publisher, year, edition, pages

EDP Sciences, 2018. Vol. 612, article id A9

Keywords [en]

gamma rays: general, gamma rays: ISM, Galaxy: center, cosmic rays

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Physics, Astroparticle Physics

Identifiers

URN: urn:nbn:se:lnu:diva-76467DOI: 10.1051/0004-6361/201730824ISI: 000429404700009Scopus ID: 2-s2.0-85045525369OAI: oai:DiVA.org:lnu-76467DiVA, id: diva2:1232114

Available from: 2018-07-10 Created: 2018-07-10 Last updated: 2022-05-10Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records

Becherini, Yvonne Farnier, Christian Prokhorov, Dmitry Punch, Michael

Search in DiVA

doi

urn-nbn

Total: 502 hits

Cite ExportLink to record

Permanent link

https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76467

Direct link

http://lnu.diva-portal.org/smash/record.jsf?pid=diva2:1232114

Cite

Citation style

apa
ieee
modern-language-association-8th-edition
vancouver
Other style

More styles

Language

de-DE
en-GB
en-US
fi-FI
nn-NO
nn-NB
sv-SE
Other locale

More languages

Output format

html
text
asciidoc
rtf

v. 2.44.0

WCAG

DiVA support

Linnaeus University Library

Linnaeus University Press

Publish/Register