On the Origin of Radio Emission in the X-ray States of XTE J1650-500 during the 2001-2002 Outburst

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dc.creatorCorbel, S.
dc.creatorFender, R. P.
dc.creatorTomsick, J. A.
dc.creatorTzioumis, A. K.
dc.creatorTingay, S.
dc.date2004-09-07
dc.date.accessioned2026-07-07T10:27:18Z
dc.date.available2026-07-07T10:27:18Z
dc.descriptionWe report on simultaneous radio and X-ray observations of the black hole candidate XTE J1650-500 during the course of its 2001-2002 outburst. The scheduling of the observations allowed us to sample the properties of XTE J1650-50 in different X-ray spectral states, namely the hard state, the steep power-law state and the thermal dominant state, according to the recent spectral classification of McClintock & Remillard. The hard state is consistent with a compact jet dominating the spectral energy distribution at radio frequencies; however, the current data suggest that its contribution as direct synchrotron emission at higher energies may not be significant. In that case, XTE J1650-50 may be dominated by Compton processes (either inverse Comptonization of thermal disk photons and/or SSC from the base of the compact jet) in the X-ray regime. We, surprisingly, detect a faint level of radio emission in the thermal dominant state that may be consistent with the emission of previously ejected material interacting with the interstellar medium, similar (but on a smaller angular scale) to what was observed in XTE J1550-564 by Corbel and co-workers. Based on the properties of radio emission in the steep power-law state of XTE J1650-50, and taking into account the behavior of other black hole candidates (namely GX 339-4, XTE J1550-564, and XTE J1859+226) while in the intermediate and steep power-law states, we are able to present a general pattern of behavior for the origin of radio emission in these two states that could be important for understanding the accretion-ejection coupling very close to the black hole event horizon.
dc.descriptionAccepted for publication in The Astrophysical Journal. 33 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0409154
dc.identifierhttp://arxiv.org/abs/astro-ph/0409154
dc.identifierAstrophys.J.617:1272-1283,2004
dc.identifierdoi:10.1086/425650
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177115
dc.subjectAstrophysics
dc.titleOn the Origin of Radio Emission in the X-ray States of XTE J1650-500 during the 2001-2002 Outburst
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