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Searching a Thousand Radio Pulsars for Gamma-ray Emission

hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorSMITH, D.A.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorBRUEL, P.
hal.structure.identifierLaboratoire de physique et chimie de l'environnement [LPCE]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
dc.contributor.authorCOGNARD, I.
dc.contributor.authorCAMERON, A.D.
dc.contributor.authorCAMILO, F.
dc.contributor.authorDAI, S.
hal.structure.identifierLaboratoire de physique et chimie de l'environnement [LPCE]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
dc.contributor.authorGUILLEMOT, L.
dc.contributor.authorJOHNSON, T.J.
dc.contributor.authorJOHNSTON, S.
dc.contributor.authorKEITH, M.J.
dc.contributor.authorKERR, M.
dc.contributor.authorKRAMER, M.
dc.contributor.authorLYNE, A.G.
dc.contributor.authorMANCHESTER, R.N.
dc.contributor.authorSHANNON, R.
dc.contributor.authorSOBEY, C.
dc.contributor.authorSTAPPERS, B.W.
dc.contributor.authorWELTEVREDE, P.
dc.date.issued2019
dc.description.abstractEnIdentifying as many gamma-ray pulsars as possible in the Fermi Large Area Telescope (LAT) data helps test pulsar emission models by comparing predicted and observed properties for a large, varied sample with as little selection bias as possible. It also improves extrapolations from the observed population to estimate the contribution of unresolved pulsars to the diffuse gamma-ray emission. We use a recently developed method to determine the probability that a given gamma-ray photon comes from a known position in the sky, convolving the photon's energy with the LAT's energy-dependent point-spread function, without the need for an accurate spatial and spectral model of the gamma-ray sky around the pulsar. The method is simple and fast and, importantly, provides probabilities, or weights, for gamma-rays from pulsars too faint for phase-integrated detection. We applied the method to over a thousand pulsars for which we obtained rotation ephemerides from radio observations, and discovered gamma-ray pulsations from 16 pulsars, 12 young and 4 recycled. PSR J2208+4056 has spindown power erg s−1, about three times lower than the previous observed gamma-ray emission "deathline." PSRs J2208+4056 and J1816−0755 have radio interpulses, constraining their geometry and perhaps enhancing their gamma-ray luminosity. We discuss whether the deathline is an artifact of selection bias due to the pulsar distance.
dc.language.isoen
dc.subject.engamma rays: stars
dc.subject.enpulsars: individual
dc.subject.en(J0636+5129
dc.subject.enJ1731-4744
dc.subject.enJ1816-0755
dc.subject.enJ2208+4056)
dc.title.enSearching a Thousand Radio Pulsars for Gamma-ray Emission
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4357/aaf57d
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.subject.halPlanète et Univers [physics]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv1812.00719
bordeaux.journalAstrophys.J.
bordeaux.page78
bordeaux.volume871
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01965501
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01965501v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astrophys.J.&rft.date=2019&rft.volume=871&rft.issue=1&rft.spage=78&rft.epage=78&rft.au=SMITH,%20D.A.&BRUEL,%20P.&COGNARD,%20I.&CAMERON,%20A.D.&CAMILO,%20F.&rft.genre=article


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