Constraints on particle acceleration in SS433/W50 from MAGIC and HESS observations

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dc.contributor.authorBarrio Uña, Juan Abel
dc.contributor.authorBonnefoy, Simon Francois Albert
dc.contributor.authorContreras González, José Luis
dc.contributor.authorDomínguez-Adame Acosta, Francisco
dc.contributor.authorFidalgo Carreto, David
dc.contributor.authorFonseca González, Mª Victoria
dc.contributor.authorLópez Moya, Marcos
dc.contributor.authorNievas Rosillo, Mireia
dc.date.accessioned2023-06-17T12:27:46Z
dc.date.available2023-06-17T12:27:46Z
dc.date.issued2018-04-09
dc.description© EDP Sciencies. We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, PA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009- 00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project 09/176, the University of Rijeka Project 13.12.1.3.02, the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 2016/22/M/ ST9/00382. Artículo firmado por más de diez autores.
dc.description.abstractSpontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relations for the photon in vacuum. Consequently, gamma-rays of different energies, emitted simultaneously from astrophysical sources, could accumulate measurable differences in their time of flight until they reach the Earth. Such tests have been carried out in the past using fast variations of gamma-ray flux from pulsars, and more recently from active galactic nuclei and gamma-ray bursts. We present new constraints studying the gamma-ray emission of the galactic Crab Pulsar, recently observed up to TeV energies by the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) collaboration. A profile likelihood analysis of pulsar events reconstructed for energies above 400 GeV finds no significant variation in arrival time as their energy increases. Ninety-five percent CL limits are obtained on the effective Lorentz invariance violating energy scale at the level of EQG₁ > 5.5 x 10¹⁷ Ge V (4.5 10¹⁷ Ge V) for a linear, and E(QG₂) > 5.9 x 10¹⁰ Ge V (5.3 10¹⁰ Ge V) for a quadratic scenario, for the subluminal and the superluminal cases, respectively. A substantial part of this study is dedicated to calibration of the test statistic, with respect to bias and coverage properties. Moreover, the limits take into account systematic uncertainties, which are found to worsen the statistical limits by about 36%–42%. Our constraints would have been much more stringent if the intrinsic pulse shape of the pulsar between 200 GeV and 400 GeV was understood in sufficient detail and allowed inclusion of events well below 400 GeV.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipCentro de Excelencia "Severo Ochoa"
dc.description.sponsorshipUnidad de Excelencia "Maria de Maeztu"
dc.description.sponsorshipGerman B.M.B.F.
dc.description.sponsorshipGerman M.P.G.
dc.description.sponsorshipItalian INFN
dc.description.sponsorshipItalian INAF
dc.description.sponsorshipSwiss National Fund SNF
dc.description.sponsorshipCroatian Science Foundation (HrZZ) Project
dc.description.sponsorshipUniversity of Rijeka Project
dc.description.sponsorshipDFG Collaborative Research Centers
dc.description.sponsorshipPolish MNiSzW grant
dc.description.sponsorshipGerman Ministry for Education and Research (BMBF)
dc.description.sponsorshipMax Planck Society
dc.description.sponsorshipGerman Research Foundation (DFG)
dc.description.sponsorshipFrench Ministry for Research
dc.description.sponsorshipCNRS-IN2P3
dc.description.sponsorshipAstroparticle Interdisciplinary Programme of the CNRS
dc.description.sponsorshipUK Science and Technology Facilities Council (STFC)
dc.description.sponsorshipIPNP of the Charles University
dc.description.sponsorshipCzech Science Foundation
dc.description.sponsorshipPolish Ministry of Science and Higher Education
dc.description.sponsorshipSouth African Department of Science and Technology
dc.description.sponsorshipNational Research Foundation
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/47687
dc.identifier.doi10.1051/0004-6361/201731169
dc.identifier.issn1432-0746
dc.identifier.officialurlhttp://dx.doi.org/10.1051/0004-6361/201731169
dc.identifier.relatedurlhttps://www.aanda.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/12139
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciencies
dc.relation.projectID(FPA2015-69818-P; FPA2012-36668; FPA2015-68378-P; FPA2015-69210-C6-2-R; FPA2015-69210-C6-4-R; FPA2015-69210C6-6-R)
dc.relation.projectID(AYA2015-71042-P; AYA2016-76012-C3-1-P)
dc.relation.projectIDESP2015-71662-C2-2-P
dc.relation.projectIDCSD2009-00064
dc.relation.projectIDSEV-2015-0548
dc.relation.projectIDSEV-2012-0234
dc.relation.projectIDMDM-2014-0369
dc.relation.projectID09/176
dc.relation.projectID13.12.1.3.02
dc.relation.projectIDSFB823/C4
dc.relation.projectIDSFB876/C3
dc.relation.projectID745/N-HESS-MAGIC/2010/0
dc.rights.accessRightsopen access
dc.subject.cdu539.1
dc.subject.keywordMicroquasar GRS 1915+105
dc.subject.keywordGamma-ray sources
dc.subject.keywordSS 433
dc.subject.keywordCrab-nebula
dc.subject.keywordInterstellar-medium
dc.subject.keywordSS-433
dc.subject.keywordJets
dc.subject.keywordEmission
dc.subject.keywordSystem
dc.subject.keywordSpectrum
dc.subject.ucmFísica nuclear
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleConstraints on particle acceleration in SS433/W50 from MAGIC and HESS observations
dc.typejournal article
dc.volume.number612
dspace.entity.typePublication
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