Constraints on particle acceleration in SS433/W50 from MAGIC and H.E.S.S. observations

Author:

,Ahnen M. L.,Ansoldi S.,Antonelli L. A.,Arcaro C.,Babić A.,Banerjee B.,Bangale P.,Barres de Almeida U.,Barrio J. A.,Becerra González J.,Bednarek W.,Bernardini E.,Berti A.,Biasuzzi B.,Biland A.,Blanch O.,Bonnefoy S.,Bonnoli G.,Borracci F.,Carosi R.,Carosi A.,Chatterjee A.,Colin P.,Colombo E.,Contreras J. L.,Cortina J.,Covino S.,Cumani P.,Da Vela P.,Dazzi F.,De Angelis A.,De Lotto B.,de Oña Wilhelmi E.,Di Pierro F.,Doert M.,Domínguez A.,Dominis Prester D.,Dorner D.,Doro M.,Einecke S.,Eisenacher Glawion D.,Elsaesser D.,Engelkemeier M.,Fallah Ramazani V.,Fernández-Barral A.,Fidalgo D.,Fonseca M. V.,Font L.,Fruck C.,Galindo D.,García López R. J.,Garczarczyk M.,Gaug M.,Giammaria P.,Godinović N.,Gora D.,Griffiths S.,Guberman D.,Hadasch D.,Hahn A.,Hassan T.,Hayashida M.,Herrera J.,Hose J.,Hrupec D.,Hughes G.,Ishio K.,Konno Y.,Kubo H.,Kushida J.,Kuveždić D.,Lelas D.,Lindfors E.,Lombardi S.,Longo F.,López M.,López-Oramas A.,Majumdar P.,Makariev M.,Maneva G.,Manganaro M.,Mannheim K.,Maraschi L.,Mariotti M.,Martínez M.,Mazin D.,Menzel U.,Minev M.,Mirzoyan R.,Moralejo A.,Moreno V.,Moretti E.,Munar-Adrover P.,Neustroev V.,Niedzwiecki A.,Nievas Rosillo M.,Nilsson K.,Nishijima K.,Noda K.,Nogués L.,Paiano S.,Palacio J.,Paneque D.,Paoletti R.,Paredes J. M.,Paredes-Fortuny X.,Pedaletti G.,Peresano M.,Perri L.,Persic M.,Prada Moroni P. G.,Prandini E.,Puljak I.,Garcia J. R.,Reichardt I.,Rhode W.,Ribó M.,Rico J.,Saito T.,Satalecka K.,Schroeder S.,Schweizer T.,Shore S. N.,Sillanpää A.,Sitarek J.,Šnidarić I.,Sobczynska D.,Stamerra A.,Strzys M.,Surić T.,Takalo L.,Tavecchio F.,Temnikov P.,Terzić T.,Tescaro D.,Teshima M.,Torres D. F.,Torres-Albà N.,Treves A.,Vanzo G.,Vazquez Acosta M.,Vovk I.,Ward J. E.,Will M.,Wu M. H.,Zarić D.,Abdalla H.,Abramowski A.,Aharonian F.,Ait Benkhali F.,Akhperjanian A. G.,Andersson T.,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.,Bordas P.,Bregeon J.,Brun F.,Brun P.,Bryan M.,Büchele M.,Bulik T.,Capasso M.,Carr J.,Casanova S.,Cerruti M.,Chakraborty N.,Chalme-Calvet R.,Chaves R. C. G.,Chen A.,Chevalier J.,Chrétien M.,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-Ataï 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 C.,Fegan S.,Fernandes M. V.,Fiasson A.,Fontaine G.,Förster A.,Funk S.,Füßling M.,Gabici S.,Gajdus M.,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.,Hervet O.,Hinton J. A.,Hofmann W.,Hoischen C.,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.,Katarzyński K.,Katsuragawa M.,Katz U.,Kerszberg D.,Khangulyan D.,Khélifi B.,Kieffer M.,King J.,Klepser S.,Klochkov D.,Kluźniak W.,Kolitzus D.,Komin Nu.,Kosack K.,Krakau S.,Kraus M.,Krüger P. P.,Laffon H.,Lamanna G.,Lau J.,Lees J.-P.,Lefaucheur J.,Lefranc V.,Lemière A.,Lemoine-Goumard M.,Lenain J.-P.,Leser E.,Lohse T.,Lorentz M.,Liu R.,López-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.,Morå K.,Moulin E.,Murach T.,Nakashima S.,de Naurois M.,Niederwanger F.,Niemiec J.,Oakes L.,O’Brien P.,Odaka H.,Öttl S.,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 D.,Prokoph H.,Pühlhofer G.,Punch M.,Quirrenbach A.,Raab S.,Reimer A.,Reimer O.,Renaud M.,de los Reyes R.,Richter S.,Rieger F.,Romoli C.,Rowell G.,Rudak B.,Rulten C. B.,Safi-Harb S.,Sahakian V.,Saito S.,Salek D.,Sanchez D. A.,Santangelo A.,Sasaki M.,Schlickeiser R.,Schüssler 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 Ł.,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.,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.,Zabalza V.,Zaborov D.,Zacharias M.,Zanin R.,Zdziarski A.A.,Zech A.,Zefi F.,Ziegler A.,Zywucka N.,

Abstract

Context. The large jet kinetic power and non-thermal processes occurring in the microquasar SS 433 make this source a good candidate for a very high-energy (VHE) gamma-ray emitter. Gamma-ray fluxes above the sensitivity limits of current Cherenkov telescopes have been predicted for both the central X-ray binary system and the interaction regions of SS 433 jets with the surrounding W50 nebula. Non-thermal emission at lower energies has been previously reported, indicating that efficient particle acceleration is taking place in the system.Aim. We explore the capability of SS 433 to emit VHE gamma rays during periods in which the expected flux attenuation due to periodic eclipses (Porb~ 13.1 days) and precession of the circumstellar disk (Ppre ~ 162 days) periodically covering the central binary system is expected to be at its minimum. The eastern and western SS 433/W50 interaction regions are also examined using the whole data set available. We aim to constrain some theoretical models previously developed for this system with our observations.Methods. We made use of dedicated observations from the Major Atmospheric Gamma Imaging Cherenkov telescopes (MAGIC) and High Energy Spectroscopic System (H.E.S.S.) of SS 433 taken from 2006 to 2011. These observation were combined for the first time and accounted for a total effective observation time of 16.5 h, which were scheduled considering the expected phases of minimum absorption of the putative VHE emission. Gamma-ray attenuation does not affect the jet/medium interaction regions. In this case, the analysis of a larger data set amounting to ~40–80 h, depending on the region, was employed.Results. No evidence of VHE gamma-ray emission either from the central binary system or from the eastern/western interaction regions was found. Upper limits were computed for the combined data set. Differential fluxes from the central system are found to be ≲ 10−12–10−13 TeV−1 cm−2 s−1 in an energy interval ranging from ~few × 100 GeV to ~few TeV. Integral flux limits down to ~ 10−12–10−13 ph cm−2 s−1 and ~ 10−13–10−14 ph cm−2 s−1 are obtainedat 300 and 800 GeV, respectively. Our results are used to place constraints on the particle acceleration fraction at the inner jetregions and on the physics of the jet/medium interactions.Conclusions. Our findings suggest that the fraction of the jet kinetic power that is transferred to relativistic protons must be relatively small in SS 433, qp ≤ 2.5 × 10−5, to explain the lack of TeV and neutrino emission from the central system. At the SS 433/W50 interface, the presence of magnetic fields ≳10 μG is derived assuming a synchrotron origin for the observed X-ray emission. This also implies the presence of high-energy electrons with Ee up to 50 TeV, preventing an efficient production of gamma-ray fluxes in these interaction regions.

Publisher

EDP Sciences

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 23 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3