AustralieFrV1, Main, Exploration, bibRecord, 00A218

The 2003 radio outburst of a new X-ray transient: XTE J1720-318

Identifieur interne : 00A218 ( Main/Exploration ); précédent : 00A217; suivant : 00A219

The 2003 radio outburst of a new X-ray transient: XTE J1720-318

Auteurs : C. Brocksopp [Royaume-Uni] ; S. Corbel [France] ; R. P. Fender [Pays-Bas] ; M. Rupen [États-Unis] ; R. Sault [Australie] ; S. J. Tingay [Australie] ; D. Hannikainen [Finlande] ; K. O'Brien [Chili]

Source :

Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2005-01-01.

RBID : ISTEX:C0C203AC6287D05A494F0758A5F56C5DD7CF7778

Descripteurs français

Pascal (Inist)
- Binaire RX, Continuum, Cosmologie, Courbe lumière, Disque accrétion, Emission radioélectrique, Etoile radio, Indice spectral, Jet, Observation radio, Source RX binaire, Source RX cosmique, Source RX transitoire, Trou noir.
Wicri :
- topic : Cosmologie.

English descriptors

Abstract

We present radio observations of the black hole X-ray transient XTE J1720-318, which was discovered in 2003 January as it entered an outburst. We analyse the radio data in the context of the X-ray outburst and the broad-band spectrum. An unresolved radio source was detected during the rising phase, reaching a peak of nearly 5 mJy approximately coincident with the peak of the X-ray light curve. A study of the spectral indices suggests that at least two ejection events took place, with the radio-emitting material expanding and becoming optically thin as it faded. The broad-band spectra suggested that the accretion disc dominated the emission, as expected for a source in a soft state. The radio emission decayed to below the sensitivity of the telescopes for ∼6 weeks but switched on again during the transition of the X-ray source to the low/hard state. At least one ‘glitch’ was superimposed on the otherwise exponential decay of the X-ray light curve, which was reminiscent of the multiple jet ejections of XTE J1859+226. We also present a Ks-band image of XTE J1720-318 and its surrounding field taken with the Very Large Telescope.

Url:

DOI: 10.1111/j.1365-2966.2004.08427.x

Affiliations:

Australie, Chili, Finlande, France, Pays-Bas, Royaume-Uni, États-Unis
Nouveau-Mexique, Uusimaa
Helsinki
Université d'Helsinki

Le document en format XML

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<front><div type="abstract" xml:lang="en">We present radio observations of the black hole X-ray transient XTE J1720-318, which was discovered in 2003 January as it entered an outburst. We analyse the radio data in the context of the X-ray outburst and the broad-band spectrum. An unresolved radio source was detected during the rising phase, reaching a peak of nearly 5 mJy approximately coincident with the peak of the X-ray light curve. A study of the spectral indices suggests that at least two ejection events took place, with the radio-emitting material expanding and becoming optically thin as it faded. The broad-band spectra suggested that the accretion disc dominated the emission, as expected for a source in a soft state. The radio emission decayed to below the sensitivity of the telescopes for ∼6 weeks but switched on again during the transition of the X-ray source to the low/hard state. At least one ‘glitch’ was superimposed on the otherwise exponential decay of the X-ray light curve, which was reminiscent of the multiple jet ejections of XTE J1859+226. We also present a Ks-band image of XTE J1720-318 and its surrounding field taken with the Very Large Telescope.</div>
</front>
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Serveur d'exploration sur les relations entre la France et l'Australie

The 2003 radio outburst of a new X-ray transient: XTE J1720-318

The 2003 radio outburst of a new X-ray transient: XTE J1720-318

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur les relations entre la France et l'Australie
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