An X-Ray Imaging Survey of Quasar Jets: The Complete Survey

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dc.contributor.authorMarshall, H L
dc.contributor.authorGelbord, J M
dc.contributor.authorWorrall, Diana M
dc.contributor.authorBirkinshaw, Mark
dc.contributor.authorSchwartz, D A
dc.contributor.authorJauncey, David
dc.contributor.authorGriffiths, G
dc.contributor.authorMurphy, D W
dc.contributor.authorLovell, J
dc.contributor.authorPerlman, E
dc.contributor.authorGodfrey, Leith
dc.date.accessioned2021-10-19T01:28:10Z
dc.date.available2021-10-19T01:28:10Z
dc.date.issued2018
dc.date.updated2020-11-23T11:32:48Z
dc.description.abstractWe present Chandra X-ray imaging of a flux-limited sample of flat spectrum radio-emitting quasars with jet-like structure. X-rays are detected from 59% of 56 jets. No counter-jets were detected. The core spectra are fitted by power-law spectra with a photon index Γx, whose distribution is consistent with a normal distribution, with a mean of 1.61+0.04 -0.05 and dispersion of 0.15+0.04 -0.03. We show that the distribution of α rx, the spectral index between the X-ray and radio band jet fluxes, fits a Gaussian with a mean of 0.974 ±0.012 and dispersion of 0.077 ±0.008. We test the model in which kiloparsec-scale X-rays result from inverse Compton scattering of cosmic microwave background photons off the jet's relativistic electrons (the IC-CMB model). In the IC-CMB model, a quantity Q computed from observed fluxes and the apparent size of the emission region depends on redshift as (1 + z)3+α. We fit Q ∝ (1 + z)a, finding a = 0.88 ±0.90, and reject at 99.5% confidence the hypothesis that the average α rx depends on redshift in the manner expected in the IC-CMB model. This conclusion is mitigated by a lack of detailed knowledge of the emission region geometry, which requires deeper or higher resolution X-ray observations. Furthermore, if the IC-CMB model is valid for X-ray emission from kiloparsec-scale jets, then the jets must decelerate on average: bulk Lorentz factors should drop from about 15 to 2-3 between parsec and kiloparsec scales. Our results compound the problems that the IC-CMB model has in explaining the X-ray emission of kiloparsec-scale jets.en_AU
dc.description.sponsorshipSupport for this work was provided in part by the National Aeronautics and Space Administration (NASA) through the Smithsonian Astrophysical Observatory (SAO) contract SV3- 73016 to MIT for support of the Chandra X-Ray Center (CXC), which is operated by SAO for and on behalf of NASA under contract NAS8-03060. Support was also provided by NASA under contract NAS 8-39073 to SAO.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0004-637Xen_AU
dc.identifier.urihttp://hdl.handle.net/1885/251014
dc.language.isoen_AUen_AU
dc.provenanceOriginal content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en_AU
dc.publisherIOP Publishingen_AU
dc.rights© 2018. The American Astronomical Societyen_AU
dc.rights.licenseCC Attribution 3.0 Licenseen_AU
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en_AU
dc.sourceThe Astrophysical Journalen_AU
dc.titleAn X-Ray Imaging Survey of Quasar Jets: The Complete Surveyen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue66en_AU
local.bibliographicCitation.lastpage25en_AU
local.bibliographicCitation.startpage1en_AU
local.contributor.affiliationMarshall, H L, Massachusetts Institute of Technologyen_AU
local.contributor.affiliationGelbord, J M, Massachusetts Institute of Technologyen_AU
local.contributor.affiliationWorrall, Diana M, University of Bristolen_AU
local.contributor.affiliationBirkinshaw, Mark, University of Bristolen_AU
local.contributor.affiliationSchwartz, D A, Harvard-Smithsonian Center for Astrophysicsen_AU
local.contributor.affiliationJauncey, David, College of Science, ANUen_AU
local.contributor.affiliationGriffiths, G, University of Bristolen_AU
local.contributor.affiliationMurphy, D W, California Institute of Technology Jet Propulsion Laboratoryen_AU
local.contributor.affiliationLovell, J, University of Tasmaniaen_AU
local.contributor.affiliationPerlman, E, Florida institute of Technologyen_AU
local.contributor.affiliationGodfrey, Leith, College of Science, ANUen_AU
local.contributor.authoremailu1811140@anu.edu.auen_AU
local.contributor.authoruidJauncey, David, u1811140en_AU
local.contributor.authoruidGodfrey, Leith, u4052407en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020104 - Galactic Astronomyen_AU
local.identifier.ariespublicationa383154xPUB9667en_AU
local.identifier.citationvolume856en_AU
local.identifier.doi10.3847/1538-4357/aaaf66en_AU
local.identifier.scopusID2-s2.0-85044712064
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttp://iopscience.iop.org/en_AU
local.type.statusPublished Versionen_AU

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