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Time-dependent visi...
Time-dependent visibility modelling of a relativistic jet in the X-ray binary MAXI J1803-298
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Wood, C. M. (author)
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Miller-Jones, J. C. A. (author)
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Bahramian, A. (author)
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Tingay, Steven J. (author)
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- Russell, T. (author)
- Istituto nazionale di astrofisica (INAF)
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- Tetarenko, Alexandra J. (author)
- East Asian Observatory,Texas Tech University at Lubbock
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- Altamirano, D. (author)
- University of Southampton
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- Belloni, Tomaso (author)
- Istituto nazionale di astrofisica (INAF)
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- Carotenuto, F. (author)
- University Of Oxford
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- Ceccobello, Chiara, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Corbel, S. (author)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Espinasse, M. (author)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Fender, R. P. (author)
- University of Cape Town,University Of Oxford
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- Körding, E. (author)
- Radboud Universiteit,Radboud University
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- Migliari, S. (author)
- Universitat de Barcelona,University of Barcelona,European Space Astronomy Centre (ESAC)
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- Russell, David M. (author)
- New York University Abu Dhabi
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- Sarazin, C. L. (author)
- University of Virginia
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- Sivakoff, G. R. (author)
- University of Alberta
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- Soria, Roberto (author)
- Istituto nazionale di astrofisica (INAF),Chinese Academy of Sciences,The University of Sydney
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Tudose, V. (author)
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(creator_code:org_t)
- 2023-03-30
- 2023
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 522:1, s. 70-89
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Tracking the motions of transient jets launched by low-mass X-ray binaries (LMXBs) is critical for determining the moment of jet ejection, and identifying any corresponding signatures in the accretion flow. However, these jets are often highly variable and can travel across the resolution element of an image within a single observation, violating a fundamental assumption of aperture synthesis. We present a novel approach in which we directly fit a single time-dependent model to the full set of interferometer visibilities, where we explicitly parametrize the motion and flux density variability of the emission components, to minimize the number of free parameters in the fit, while leveraging information from the full observation. This technique allows us to detect and characterize faint, fast-moving sources, for which the standard time binning technique is inadequate. We validate our technique with synthetic observations, before applying it to three Very Long Baseline Array (VLBA) observations of the black hole candidate LMXB MAXI J1803-298 during its 2021 outburst. We measured the proper motion of a discrete jet component to be 1.37 ± 0.14 mas h-1, and thus we infer an ejection date of MJD 59348.08+0.05-0.06, which occurs just after the peak of a radio flare observed by the Australia Telescope Compact Array (ATCA) and the Atacama Large Millimeter/Sub-Millimeter Array (ALMA), while MAXI J1803-298 was in the intermediate state. Further development of these new VLBI analysis techniques will lead to more precise measurements of jet ejection dates, which, combined with dense, simultaneous multiwavelength monitoring, will allow for clearer identification of jet ejection signatures in the accretion flow.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- stars: individual: MAXI J1803-298
- X-rays: binaries
- stars: jets
- techniques: high angular resolution
- stars: black holes
- techniques: interferometric
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Wood, C. M.
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Miller-Jones, J. ...
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Bahramian, A.
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Tingay, Steven J ...
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Russell, T.
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Tetarenko, Alexa ...
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show more...
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Altamirano, D.
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Belloni, Tomaso
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Carotenuto, F.
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Ceccobello, Chia ...
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Corbel, S.
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Espinasse, M.
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Fender, R. P.
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Körding, E.
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Migliari, S.
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Russell, David M ...
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Sarazin, C. L.
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Sivakoff, G. R.
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Soria, Roberto
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Tudose, V.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Monthly Notices ...
- By the university
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Chalmers University of Technology