Publication:
Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

dc.contributor.authorBarrio Uña, Juan Abel
dc.contributor.authorContreras González, José Luis
dc.contributor.authorDomínguez Díaz, Alberto
dc.contributor.authorCarreto Fidalgo, David Friedrich
dc.contributor.authorFonseca González, Victoria
dc.contributor.authorHoang, Kim Dinh
dc.contributor.authorLópez Moya, Marcos
dc.contributor.authorNievas Rosillo, Mireia
dc.contributor.authorPeñil del Campo, Pablo
dc.contributor.authorSaha, Lab
dc.date.accessioned2023-06-17T13:19:17Z
dc.date.available2023-06-17T13:19:17Z
dc.date.issued2018-11-01
dc.description© 2018. The American Astronomical Society. All rights reserved. Artículo firmado por 212 autores. VERITAS is supported by the U.S. Department of Energy, the U.S. National Science Foundation, the Smithsonian Institution, and by NSERC in Canada. We acknowledge the excellent work of the support staff at the Fred Lawrence Whipple Observatory and at collaborating institutions in the construction and operation of VERITAS.; We acknowledge Fermi and Swift GI program grants 80NSSC17K0648 and 80NSSC17K0314.
dc.description.abstractWe report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between 100 GeV and 20 TeV with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around 0.5 TeV. This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipU.S. National Science Foundation
dc.description.sponsorshipSmithsonian Institution
dc.description.sponsorshipNSERC in Canada
dc.description.sponsorshipFermi and Swift GI program
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/50949
dc.identifier.doi10.3847/2041-8213/aae70e
dc.identifier.issn2041-8205
dc.identifier.officialurlhttp://dx.doi.org/10.3847/2041-8213/aae70e
dc.identifier.relatedurlhttps://iopscience.iop.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/13054
dc.issue.number1
dc.journal.titleAstrophysical journal letters
dc.language.isoeng
dc.publisherIOP Publishing Ltd
dc.relation.projectID80NSSC17K0648
dc.relation.projectID80NSSC17K0314
dc.rights.accessRightsopen access
dc.subject.cdu539.1
dc.subject.keywordPulsar
dc.subject.keywordWind
dc.subject.keywordStar
dc.subject.keywordTelescopes
dc.subject.keywordCascades
dc.subject.ucmFísica nuclear
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titlePeriastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period
dc.typejournal article
dc.volume.number867
dspace.entity.typePublication
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