AustralieFrV1, Main, Exploration, bibRecord, 009076

The variable radio counterpart and possible large‐scale jet of the new Z source XTE J1701−462

Identifieur interne : 009076 ( Main/Exploration ); précédent : 009075; suivant : 009077

The variable radio counterpart and possible large‐scale jet of the new Z source XTE J1701−462

Auteurs : R. P. Fender [Royaume-Uni] ; M. Dahlem [Australie] ; J. Homan [États-Unis] ; S. Corbel [France] ; R. Sault [Australie] ; T. M. Belloni [Italie]

Source :

Monthly Notices of the Royal Astronomical Society: Letters [ 1745-3925 ] ; 2007-09-01.

RBID : ISTEX:22A80F3B99D565FD8F82DD7F4C8E56B6FF107322

English descriptors

KwdEn :
- Accreting, Aring branch, Astron, Atca observations, Australia telescope, Black holes, Eddington limit, Event horizons, Fender, Fender hendry, High rates, Homan, Journal compilation, Klis, Luminosity, Migliari, Migliari fender, Mnras, Neutron, Neutron star, Neutron star xrbs, Neutron stars, Radio counterpart, Radio detections, Radio emission, Radio luminosity, Radio observation, Radio observations, Radio source, Radio sources, Radio spectra, Radio spectrum, Rding, Rxte, Rxte observations, Source counts, Spectral index, Static limits, Thin emission, Unambiguous detections, Upper limits, Variable radio counterpart, Weighted maps, Xrbs.
Teeft :
- Accreting, Aring branch, Astron, Atca observations, Australia telescope, Black holes, Eddington limit, Event horizons, Fender, Fender hendry, High rates, Homan, Journal compilation, Klis, Luminosity, Migliari, Migliari fender, Mnras, Neutron, Neutron star, Neutron star xrbs, Neutron stars, Radio counterpart, Radio detections, Radio emission, Radio luminosity, Radio observation, Radio observations, Radio source, Radio sources, Radio spectra, Radio spectrum, Rding, Rxte, Rxte observations, Source counts, Spectral index, Static limits, Thin emission, Unambiguous detections, Upper limits, Variable radio counterpart, Weighted maps, Xrbs.

Abstract

We report radio observations, made with the Australia Telescope Compact Array, of the X‐ray transient XTE J1701−462. This system has been classified as a new ‘Z’ source, displaying characteristic patterns of behaviour probably associated with accretion on to a low magnetic field neutron star at close to the Eddington limit. The radio counterpart is highly variable, and was detected in six of 16 observations over the period 2006 January–April. The coupling of radio emission to X‐ray state, despite limited sampling, appears to be similar to that of other ‘Z’ sources, in that there is no radio emission on the flaring branch. The mean radio and X‐ray luminosities are consistent with the other Z sources for a distance of 5–15 kpc. The radio spectrum is unusually flat, or even inverted, in contrast to the related sources, Sco X‐1 and Cir X‐1, which usually display an optically thin radio spectrum. Deep wide‐field observations indicate an extended structure 3 arcmin to the south which is aligned with the X‐ray binary. This seems to represent a significant overdensity of radio sources for the field and so, although a background source remains a strong possibility, we consider it plausible that this is a large‐scale jet associated with XTE J1701−462.

Url:

DOI: 10.1111/j.1745-3933.2007.00350.x

Affiliations:

Australie, France, Italie, Royaume-Uni, États-Unis
Massachusetts

Le document en format XML

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<front><div type="abstract" xml:lang="en">We report radio observations, made with the Australia Telescope Compact Array, of the X‐ray transient XTE J1701−462. This system has been classified as a new ‘Z’ source, displaying characteristic patterns of behaviour probably associated with accretion on to a low magnetic field neutron star at close to the Eddington limit. The radio counterpart is highly variable, and was detected in six of 16 observations over the period 2006 January–April. The coupling of radio emission to X‐ray state, despite limited sampling, appears to be similar to that of other ‘Z’ sources, in that there is no radio emission on the flaring branch. The mean radio and X‐ray luminosities are consistent with the other Z sources for a distance of 5–15 kpc. The radio spectrum is unusually flat, or even inverted, in contrast to the related sources, Sco X‐1 and Cir X‐1, which usually display an optically thin radio spectrum. Deep wide‐field observations indicate an extended structure 3 arcmin to the south which is aligned with the X‐ray binary. This seems to represent a significant overdensity of radio sources for the field and so, although a background source remains a strong possibility, we consider it plausible that this is a large‐scale jet associated with XTE J1701−462.</div>
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The variable radio counterpart and possible large‐scale jet of the new Z source XTE J1701−462

The variable radio counterpart and possible large‐scale jet of the new Z source XTE J1701−462

Source :

English descriptors

Abstract

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