Unprecedented Change in the Position of Four Radio Sources

Simple item page
aut.relation.endpage883
aut.relation.issue1en_NZ
aut.relation.journalMonthly Notices of the Royal Astronomical Societyen_NZ
aut.relation.pages10
aut.relation.startpage874
aut.relation.volume512en_NZ
aut.researcherHutcheson, Catherine
dc.contributor.authorTitov, Oen_NZ
dc.contributor.authorFrey, Sen_NZ
dc.contributor.authorMelnikov, Aen_NZ
dc.contributor.authorLambert, Sen_NZ
dc.contributor.authorShu, Fen_NZ
dc.contributor.authorXia, Ben_NZ
dc.contributor.authorGonzalez, Jen_NZ
dc.contributor.authorTercero, Ben_NZ
dc.contributor.authorGulayev, Sen_NZ
dc.contributor.authorWeston, Sen_NZ
dc.contributor.authorNatusch, Ten_NZ
dc.date.accessioned2022-08-29T03:19:05Z
dc.date.available2022-08-29T03:19:05Z
dc.date.copyright2022en_NZ
dc.date.issued2022en_NZ
dc.description.abstractAstrometric positions of radio-emitting active galactic nuclei (AGNs) can be determined with sub-milliarcsec accuracy using very long baseline interferometry (VLBI). The usually small apparent proper motion of distant extragalactic targets allow us to realize the fundamental celestial reference frame with VLBI observations. However, long-term astrometric monitoring may reveal extreme changes in some AGN positions. Using new VLBI observations in 2018–2021, we show here that four extragalactic radio sources (3C 48, CTA 21, 1144+352, 1328+254) have a dramatic shift in their positions by 20–130 mas over two decades. For all four sources, the apparent positional shift is caused by their radio structure change.
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Volume 512, Issue 1, May 2022, Pages 874–883, https://doi.org/10.1093/mnras/stac038
dc.identifier.doi10.1093/mnras/stac038en_NZ
dc.identifier.issn0035-8711en_NZ
dc.identifier.issn1365-2966en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/15400
dc.languageEnglishen_NZ
dc.publisherRoyal Astronomical Societyen_NZ
dc.relation.urihttps://academic.oup.com/mnras/article/512/1/874/6548138
dc.rightsThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 Oleg Titov, Sándor Frey, Alexey Melnikov, Sébastien Lambert, Fengchun Shu, Bo Xia, Javier González, Belén Tercero, Sergey Gulayev, Stuart Weston, Tim Natusch Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectAstrometryen_NZ
dc.subjectAstronomy & Astrophysicsen_NZ
dc.subjectGalaxies: Activeen_NZ
dc.subjectGalaxies: Jetsen_NZ
dc.subjectJETen_NZ
dc.subjectKINEMATICSen_NZ
dc.subjectOPTICAL-IDENTIFICATIONen_NZ
dc.subjectPhysical Sciencesen_NZ
dc.subjectPROPER MOTIONSen_NZ
dc.subjectQUASARSen_NZ
dc.subjectRadio continuum: Galaxiesen_NZ
dc.subjectREFERENCE FRAMEen_NZ
dc.subjectReference systemsen_NZ
dc.subjectSAMPLEen_NZ
dc.subjectScience & Technologyen_NZ
dc.subjectVLAen_NZ
dc.titleUnprecedented Change in the Position of Four Radio Sourcesen_NZ
dc.typeJournal Article
pubs.elements-id452835
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Faculty of Design & Creative Technologies
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies/PBRF ECMS
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