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dc.contributor.author
Van Den Eijnden, J.
dc.contributor.author
Degenaar, N.
dc.contributor.author
Russell, T. D.
dc.contributor.author
Buisson, D .J. K.
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Altamirano, D.
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Padilla, M. A.
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Bahramian, A.
dc.contributor.author
Castro Segura, N.
dc.contributor.author
Fogantini, Federico Adrián
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dc.contributor.author
Heinke, C. O.
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MacCarone, T.
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Maitra, D.
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Miller Jones, J. C. A.
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Munoz Darias, T.
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Ozbey Arabaci, M.
dc.contributor.author
Russell, D. M.
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Shaw, A. W.
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Sivakoff, G.
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Tetarenko, A. J.
dc.contributor.author
Vincentelli, F.
dc.contributor.author
Wijnands, R.
dc.date.available
2023-09-20T17:25:45Z
dc.date.issued
2020-08
dc.identifier.citation
Van Den Eijnden, J.; Degenaar, N.; Russell, T. D.; Buisson, D .J. K.; Altamirano, D.; et al.; The variable radio counterpart of Swift J1858.6-0814; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 496; 4; 8-2020; 4127-4140
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/212394
dc.description.abstract
Swift J1858.6-0814 is a transient neutron star X-ray binary discovered in 2018 October. Multiwavelength follow-up observations across the electromagnetic spectrum revealed many interesting properties, such as erratic flaring on minute time-scales and evidence for wind outflows at both X-ray and optical wavelengths, strong and variable local absorption, and an anomalously hard X-ray spectrum. Here, we report on a detailed radio observing campaign consisting of one observation at 5.5/9 GHz with the Australia Telescope Compact Array, and nine observations at 4.5/7.5 GHz with the Karl G. Jansky Very Large Array. A radio counterpart with a flat to inverted radio spectrum is detected in all observations, consistent with a compact jet being launched from the system. Swift J1858.6-0814 is highly variable at radio wavelengths in most observations, showing significant variability when imaged on 3-to-5-min time-scales and changing up to factors of 8 within 20 min. The periods of brightest radio emission are not associated with steep radio spectra, implying they do not originate from the launching of discrete ejecta. We find that the radio variability is similarly unlikely to have a geometric origin, be due to scintillation, or be causally related to the observed X-ray flaring. Instead, we find that it is consistent with being driven by variations in the accretion flow propagating down the compact jet. We compare the radio properties of Swift J1858.6-0814 with those of Eddington-limited X-ray binaries with similar X-ray and optical characteristics, but fail to find a match in radio variability, spectrum, and luminosity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ACCRETION, ACCRETION DISCS
dc.subject
STARS: INDIVIDUAL (SWIFT J1858.6-0814)
dc.subject
X-RAYS: BINARIES
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The variable radio counterpart of Swift J1858.6-0814
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-09-12T18:07:55Z
dc.journal.volume
496
dc.journal.number
4
dc.journal.pagination
4127-4140
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Van Den Eijnden, J.. University of Amsterdam; Países Bajos
dc.description.fil
Fil: Degenaar, N.. University of Amsterdam; Países Bajos
dc.description.fil
Fil: Russell, T. D.. University of Amsterdam; Países Bajos
dc.description.fil
Fil: Buisson, D .J. K.. University of Southampton; Reino Unido
dc.description.fil
Fil: Altamirano, D.. University of Southampton; Reino Unido
dc.description.fil
Fil: Padilla, M. A.. Universidad de La Laguna; España
dc.description.fil
Fil: Bahramian, A.. Michigan State University; Estados Unidos
dc.description.fil
Fil: Castro Segura, N.. University of Southampton; Reino Unido
dc.description.fil
Fil: Fogantini, Federico Adrián. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
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Fil: Heinke, C. O.. University of Alberta; Canadá
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Fil: MacCarone, T.. No especifíca;
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Fil: Maitra, D.. No especifíca;
dc.description.fil
Fil: Miller Jones, J. C. A.. Curtin University; Australia
dc.description.fil
Fil: Munoz Darias, T.. Universidad de La Laguna; España
dc.description.fil
Fil: Ozbey Arabaci, M.. University of Southampton; Reino Unido
dc.description.fil
Fil: Russell, D. M.. No especifíca;
dc.description.fil
Fil: Shaw, A. W.. University of Alberta; Canadá
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Fil: Sivakoff, G.. University of Alberta; Canadá
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Fil: Tetarenko, A. J.. No especifíca;
dc.description.fil
Fil: Vincentelli, F.. University of Southampton; Reino Unido
dc.description.fil
Fil: Wijnands, R.. No especifíca;
dc.journal.title
Monthly Notices of the Royal Astronomical Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/staa1704
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