Extended VHE gamma-ray emission towards SGR1806-20, LBV 1806-20, and stellar cluster Cl*1806-20

Abdalla H, Abramowski A, Aharonian F, Benkhali FA, Akhperjanian AG, Anguener EO, Arrieta M, Aubert P, Backes M, Balzer A, Barnard M, Becherini Y, Tjus JB, Berge D, Bernhard S, Bernloehr K, Birsin E, Blackwell R, Bottcher M, Boisson C, Bolmont J, Bordas P, Bregeon J, Brun F, Brun P, Bryan M, Bulik T, Capasso M, Carr J, Casanova S, Chakraborty N, Chalme-Calvet R, Chaves RCG, Chen A, Chevalier J, Chretien M, Colafrancesco S, Cologna G, Condon B, Conrad J, Couturier C, Cui Y, Davids ID, Degrange B, Deil C, Dewilt P, Djannati-Atai A, Domainko W, Donath A, Drury LO, Dubus G, Dutson K, Dyks J, Dyrda M, Edwards T, Egberts K, Eger P, Ernenwein JP, Eschbach S, Farnier C, Fegan S, Fernandes MV, Fiasson A, Fontaine G, Foerster A, Funk S, Fuessling M, Gabici S, Gajdus M, Gallant YA, Garrigoux T, Giavitto G, Giebels B, Glicenstein JF, Gottschall D, Goyal A, Grondin MH, Grudzinska M, Hadasch D, Hahn J, Hawkes J, Heinzelmann G, Henri G, Hermann G, Hervet O, Hillert A, Hinton JA, Hofmann W, Hoischen C, Holler M, Horns D, Ivascenko A, Jacholkowska A, Jamrozy M, Janiak M, Jankowsky D, Jankowsky F, Jingo M, Jogler T, Jouvin L, Jung-Richardt I, Kastendieck MA, Katarzynski K, Katz U, Kerszberg D, Khelifi B, Kieffer M, King J, Klepser S, Klochkov D, Kluzniak W, Kolitzus D, Komin N, Kosack K, Krakau S, Kraus M, Krayzel F, Kruger PP, Laffon H, Lamanna G, Lau J, Lees JP, Lefaucheur J, Lefranc V, Lemiere A, Lemoine-Goumard M, Lenain JP, Leser E, Lohse T, Lorentz M, Liu R, Lypova I, Marandon V, Marcowith A, Mariaud C, Marx R, Maurin G, Maxted N, Mayer M, Meintjes PJ, Menzler U, Meyer M, Mitchell AMW, Moderski R, Mohamed M, Mora K, Moulin E, Murach T, De Naurois M, Niederwanger F, Niemiec J, Oakes L, Odaka H, Oettl S, Ohm S, Ostrowski M, Oya I, Padovani M, Panter M, Parsons RD, Arribas MP, Pekeur NW, Pelletier G, Petrucci PO, Peyaud B, Pita S, Poon H, Prokhorov D, Prokoph H, Pühlhofer G, Punch M, Quirrenbach A, Raab S, Reimer A, Reimer O, Renaud M, De Los Reyes R, Rieger F, Romoli C, Rosier-Lees S, Rowell G, Rudak B, Rulten CB, Sahakian V, Salek D, Sanchez DA, Santangelo A, Sasaki M, Schlickeiser R, Schussler F, Schulz A, Schwanke U, Schwemmer S, Seyffert AS, Shafi N, Shilon I, Simoni R, Sol H, Spanier F, Spengler G, Spies F, Stawarz L, Steenkamp R, Stegmann C, Stinzing F, Stycz K, Sushch I, Tavernet JP, Tavernier T, Taylor AM, Terrier R, Tluczykont M, Trichard C, Tuffs R, Van Der Walt J, van Eldik C, Van Soelen B, Vasileiadis G, Veh J, Venter C, Viana A, Vincent P, Vink J, Voisin F, Voelk HJ, Vuillaume T, Wadiasingh Z, Wagner SJ, Wagner P, Wagner RM, White R, Wierzcholska A, Willmann P, Wörnlein A, Wouters D, Yang R, Zabalza V, Zaborov D, Zacharias M, Zdziarski AA, Zech A, Zefi F, Ziegler A, Zywucka N (2018)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Publisher: EDP SCIENCES S A

Book Volume: 612

Article Number: A11

DOI: 10.1051/0004-6361/201629695

Abstract

Using the High Energy Spectroscopic System (H.E.S.S.) telescopes we have discovered a steady and extended very high-energy (VHE) gamma-ray source towards the luminous blue variable candidate LBV 1806-20, massive stellar cluster Cl* 1806-20, and magnetar SGR 1806-20. The new VHE source, HESS J1808-204, was detected at a statistical significance of >6 sigma (post-trial) with a photon flux normalisation (2.9 +/- 0.4(stat) +/- 0.5(sys)) x 10(-13) ph cm(-2) s(-1) TeV-1 at 1 TeV and a power-law photon index of 2.3 +/- 0.2(stat) +/- 0.3(sys). The luminosity of this source (0.2 to 10 TeV; scaled to distance d = 8 : 7 kpc) is L-VHE similar to 1.6 x 10(34)(d = 8.7 kpc)(2) erg s(-1). The VHE gamma-ray emission is extended and is well fit by a single Gaussian with statistical standard deviation of 0.095 degrees +/- 0.015 degrees. This extension is similar to that of the synchrotron radio nebula G10.0-0.3, which is thought to be powered by LBV 1806-20. The VHE gamma-ray luminosity could be provided by the stellar wind luminosity of LBV 1806-20 by itself and/or the massive star members of Cl* 1806-20. Alternatively, magnetic dissipation (e.g. via reconnection) from SGR 1806-20 can potentially account for the VHE luminosity. The origin and hadronic and/or leptonic nature of the accelerated particles responsible for HESS J1808-204 is not yet clear. If associated with SGR 1806 20, the potentially young age of the magnetar (650 yr) can be used to infer the transport limits of these particles to match the VHE source size. This discovery provides new interest in the potential for high-energy particle acceleration from magnetars, massive stars, and/or stellar clusters.

Authors with CRIS profile

Involved external institutions

Noordwes-Universiteit / North-West University South Africa (ZA) Universität Hamburg (UHH) Germany (DE) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) National Academy of Sciences of the Republic of Armenia (NAS RA) / Հայաստանի Հանրապետության գիտությունների ազգային ակադեմիա, ՀՀ ԳԱԱ Armenia (AM) Humboldt-Universität zu Berlin Germany (DE) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) University of Savoy Mont Blanc / Université Savoie Mont Blanc France (FR) University of Namibia (UNAM) Namibia (NA) University of Amsterdam Netherlands (NL) Ruhr-Universität Bochum (RUB) Germany (DE) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) University of Adelaide Australia (AU) University of Montpellier / Université Montpellier France (FR) Institute of Research into the Fundamental Laws of the Universe / Institut de recherche sur les lois fondamentales de l'univers (IRFU) France (FR) University of Warsaw / Uniwersytet Warszawski Poland (PL) École Polytechnique - Université Paris-Saclay France (FR) Aix-Marseille University / Aix-Marseille Université France (FR) Linnaeus University (LNU) / Linnéuniversitetet Sweden (SE) University of the Witwatersrand (WITS) South Africa (ZA) Ruprecht-Karls-Universität Heidelberg Germany (DE) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) Stockholm University / Stockholms universitet Sweden (SE) Eberhard Karls Universität Tübingen Germany (DE) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) University of Grenoble Alpes (UGA) / Université de Grenoble France (FR) University of Leicester United Kingdom (GB) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) Universität Potsdam Germany (DE) Deutsches Elektronen-Synchrotron DESY Germany (DE) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) University of the Free State South Africa (ZA)

How to cite

APA:

Abdalla, H., Abramowski, A., Aharonian, F., Benkhali, F.A., Akhperjanian, A.G., Anguener, E.O.,... Zywucka, N. (2018). Extended VHE gamma-ray emission towards SGR1806-20, LBV 1806-20, and stellar cluster Cl*1806-20. Astronomy & Astrophysics, 612. https://doi.org/10.1051/0004-6361/201629695

MLA:

Abdalla, H., et al. "Extended VHE gamma-ray emission towards SGR1806-20, LBV 1806-20, and stellar cluster Cl*1806-20." Astronomy & Astrophysics 612 (2018).

BibTeX: Download