First simultaneous multi-wavelength observations of the black hole candidate IGR J17091-3624 ATCA, INTEGRAL, Swift, and RXTE views of the 2011 outburst
Identifieur interne : 006A93 ( Main/Exploration ); précédent : 006A92; suivant : 006A94First simultaneous multi-wavelength observations of the black hole candidate IGR J17091-3624 ATCA, INTEGRAL, Swift, and RXTE views of the 2011 outburst
Auteurs : J. Rodriguez [France] ; S. Corbel [France] ; I. Caballero [France] ; J. A. Tomsick [États-Unis] ; T. Tzioumis [Australie] ; A. Paizis [Italie] ; M. Cadolle Bel [Espagne] ; E. Kuulkers [Espagne]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cosmologie.
English descriptors
- KwdEn :
Abstract
We present the results of the first four (quasi-)simultaneous radio (ATCA), X-ray (Swift, RXTE), and γ-ray (INTEGRAL) observations of the black hole candidate IGR J17091-3624, performed in February and March 2011. The X-ray analysis shows that the source was in the hard state, and then it transited to a soft intermediate state. We study the correlated radio/X-ray behaviour of this source for the first time. The radio counterpart to IGR J17091-3624 was detected during all four observations with the ATCA. In the hard state, the radio spectrum is typical of optically thick synchrotron emission from a self-absorbed compact jet. In the soft intermediate state, the detection of optically thin synchrotron emission is probably due to a discrete ejection event associated with the state transition. The position of IGR J17091-3624 in the radio versus X-ray luminosity diagram (aka fundamental plane) is compatible with that of the other black hole sources for distances greater than 11 kpc. IGR J17091-3624 also appears as a new member of the few sources that show a strong quenching of radio emission after the state transition. Using the estimated luminosity at the spectral transition from the hard state, and for a typical mass of 10 M◦., we estimate a distance to the source between ˜11 and ˜17 kpc, compatible with the radio behaviour of the source.
Affiliations:
- Australie, Espagne, France, Italie, États-Unis
- Communauté de Madrid, Île-de-France
- Gif-sur-Yvette, Madrid
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Accretion</term>
<term>Accretion disks</term>
<term>Binary X ray source</term>
<term>Black holes</term>
<term>Continuum</term>
<term>Cosmic x-ray sources</term>
<term>Cosmology</term>
<term>Jets</term>
<term>Luminosity</term>
<term>Positions</term>
<term>Radio counterpart</term>
<term>Radio emission</term>
<term>Radio spectrum</term>
<term>Radio stars</term>
<term>Simultaneous observation</term>
<term>Synchrotron radiation</term>
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<term>X-ray binary stars</term>
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<term>Trou noir</term>
<term>Contrepartie radio</term>
<term>Spectre radio</term>
<term>Rayonnement synchrotron</term>
<term>Jet</term>
<term>Etat transition</term>
<term>Position</term>
<term>Luminosité</term>
<term>Emission radioélectrique</term>
<term>Accrétion</term>
<term>Disque accrétion</term>
<term>Binaire RX</term>
<term>Source RX binaire</term>
<term>Etoile radio</term>
<term>Continuum</term>
<term>Cosmologie</term>
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<front><div type="abstract" xml:lang="en">We present the results of the first four (quasi-)simultaneous radio (ATCA), X-ray (Swift, RXTE), and γ-ray (INTEGRAL) observations of the black hole candidate IGR J17091-3624, performed in February and March 2011. The X-ray analysis shows that the source was in the hard state, and then it transited to a soft intermediate state. We study the correlated radio/X-ray behaviour of this source for the first time. The radio counterpart to IGR J17091-3624 was detected during all four observations with the ATCA. In the hard state, the radio spectrum is typical of optically thick synchrotron emission from a self-absorbed compact jet. In the soft intermediate state, the detection of optically thin synchrotron emission is probably due to a discrete ejection event associated with the state transition. The position of IGR J17091-3624 in the radio versus X-ray luminosity diagram (aka fundamental plane) is compatible with that of the other black hole sources for distances greater than 11 kpc. IGR J17091-3624 also appears as a new member of the few sources that show a strong quenching of radio emission after the state transition. Using the estimated luminosity at the spectral transition from the hard state, and for a typical mass of 10 M◦., we estimate a distance to the source between ˜11 and ˜17 kpc, compatible with the radio behaviour of the source.</div>
</front>
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<country name="États-Unis"><noRegion><name sortKey="Tomsick, J A" sort="Tomsick, J A" uniqKey="Tomsick J" first="J. A." last="Tomsick">J. A. Tomsick</name>
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