Measuring the mass of the black widow PSR J1555-2908

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dc.contributor.authorKennedy, Mark R.
dc.contributor.authorBreton, R. P.
dc.contributor.authorClark, C. J.
dc.contributor.authorSánchez, D. Mata
dc.contributor.authorVoisin, G.
dc.contributor.authorDhillon, V. S.
dc.contributor.authorHalpern, J. P.
dc.contributor.authorMarsh, T. R.
dc.contributor.authorNieder, L.
dc.contributor.authorRay, P. S.
dc.contributor.authorvan Kerkwijk, M. H.
dc.contributor.funderHorizon 2020en
dc.contributor.funderRoyal Societyen
dc.contributor.funderIrish Research Councilen
dc.contributor.funderScience and Technology Facilities Councilen
dc.contributor.funderEuropean Regional Development Funden
dc.contributor.funderCabildo de Gran Canariaen
dc.date.accessioned2022-02-14T09:40:12Z
dc.date.available2022-02-14T09:40:12Z
dc.date.issued2022-02-11
dc.description.abstractstar equation of state. In pulsar binaries with no measurable post-Keplerian parameters, this requires an accurate estimate of the binary system’s inclination and the radial velocity of the companion star by other means than pulsar timing. In this paper, we present the results of a new method for measuring this radial velocity using the binary synthesis code Icarus. This method relies on constructing a model spectrum of a tidally distorted, irradiated star as viewed for a given binary configuration. This method is applied to optical spectra of the newly discovered black widow PSR J1555–2908. By modelling the optical spectroscopy alongside optical photometry, we find that the radial velocity of the companion star is 397 4 km s−1 (errors quoted at 95% confidence interval), as well as a binary inclination of > 75°. Combined with γ-ray pulsation timing information, this gives a neutron star mass of 1.67+0.15 Mo and a companion mass of 0.060+0.005 Mo, placing PSR J1555–2908 at the observed upper limit of what is considered a black widow system.en
dc.description.sponsorshipRoyal Society (Grant number NF171019); Irish Research Council (Government of Ireland Postdoctoral Fellowship GOIPD/2021/670: Invisible Monsters); Cabildo de Gran Canaria (grant number PROID2020010104)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKennedy, M. R., Breton, R. P., Clark, C. J., Sánchez, D. M., Voisin, G., Dhillon, V. S., Halpern, J. P., Marsh, T. R., Nieder, L., Ray, P. S. and van Kerkwijk, M. H. (2022) 'Measuring the mass of the black widow PSR J1555-2908', Monthly Notices of the Royal Astronomical Society, 512(2), pp. 3001–3014. doi: 10.1093/mnras/stac379en
dc.identifier.doi10.1093/mnras/stac379
dc.identifier.eissn1365-2966
dc.identifier.endpage3014
dc.identifier.issn0035-8711
dc.identifier.issued2
dc.identifier.journaltitleMonthly Notices of the Royal Astronomical Societyen
dc.identifier.startpage3001
dc.identifier.urihttps://hdl.handle.net/10468/12561
dc.identifier.volume512
dc.language.isoenen
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/715051/EU/Fundamental Physics Using Black Widow, Redback and Transitional Pulsar Binaries/Spidersen
dc.rights© 2022, the Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectStarsen
dc.subjectNeutronen
dc.subjectBinariesen
dc.subjectCloseen
dc.subjectPulsarsen
dc.subjectIndividualen
dc.subjectPSR J1555-2908en
dc.subjectTechniquesen
dc.subjectSpectroscopicen
dc.titleMeasuring the mass of the black widow PSR J1555-2908en
dc.typeArticle (peer-reviewed)en
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