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Timing of PSR J2055+3829, an eclipsing black widow pulsar discovered with the Nançay Radio Telescope

hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
dc.contributor.authorGUILLEMOT, Lucas
hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
dc.contributor.authorOCTAU, F.
hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
dc.contributor.authorCOGNARD, Ismaël
dc.contributor.authorDESVIGNES, G.
dc.contributor.authorFREIRE, P.C.C.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorSMITH, D.A.
hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorTHEUREAU, Gilles
dc.contributor.authorBURNETT, T.H.
dc.date.issued2019
dc.identifier.issn0004-6361
dc.description.abstractEnWe report on the timing observations of the millisecond pulsar PSR J2055+3829 originally discovered as part of the SPAN512 survey conducted with the Nançay Radio Telescope. The pulsar has a rotational period of 2.089 ms and is in a tight 3.1 h orbit around a very low mass (0.023 ≤ mc ≲ 0.053 M⊙, 90% c.l.) companion. Our 1.4 GHz observations reveal the presence of eclipses of the radio signal of the pulsar, caused by the outflow of material from the companion, for a few minutes around superior conjunction of the pulsar. The very low companion mass, the observation of radio eclipses, and the detection of time variations of the orbital period establish PSR J2055+3829 as a “black widow” (BW) pulsar. Inspection of the radio signal from the pulsar during ingress and egress phases shows that the eclipses in PSR J2055+3829 are asymmetric and variable, as is commonly observed in other similar systems. More generally, the orbital properties of the new pulsar are found to be very similar to those of other known eclipsing BW pulsars. No gamma-ray source has been detected at the location of the pulsar in recent Fermi-LAT source catalogs. We used the timing ephemeris to search ten years of Fermi Large Area Telescope (LAT) data for gamma-ray pulsations, but were unable to detect any. This non-detection could be a consequence of the large distance of the pulsar compared to those of known gamma-ray millisecond pulsars outside of globular clusters. We finally compared the mass functions of eclipsing and non-eclipsing BW pulsars and confirmed previous findings that eclipsing BWs have higher mass functions than their non-eclipsing counterparts. Larger inclinations could explain the higher mass functions of eclipsing BWs. On the other hand, the mass function distributions of Galactic disk and globular cluster BWs appear to be consistent, suggesting, despite the very different environments, the existence of common mechanisms taking place in the last stages of evolution of BWs.Key words: pulsars: general / pulsars: individual: PSR J2055+3829 / binaries: eclipsing
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enpulsars: individual: PSR J2055+3829
dc.subject.enbinaries: eclipsing
dc.subject.enpulsars: general
dc.title.enTiming of PSR J2055+3829, an eclipsing black widow pulsar discovered with the Nançay Radio Telescope
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201936015
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv1907.09778
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA92
bordeaux.volume629
bordeaux.peerReviewedoui
hal.identifierhal-02283492
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02283492v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2019&rft.volume=629&rft.spage=A92&rft.epage=A92&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=GUILLEMOT,%20Lucas&OCTAU,%20F.&COGNARD,%20Isma%C3%ABl&DESVIGNES,%20G.&FREIRE,%20P.C.C.&rft.genre=article


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