2004ApJ...617.1272C


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.13CEST07:31:45

2004ApJ...617.1272C - Astrophys. J., 617, 1272-1283 (2004/December-3)

On the origin of radio emission in the X-ray states of XTE J1650-500 during the 2001-2002 outburst.

CORBEL S., FENDER R.P., TOMSICK J.A., TZIOUMIS A.K. and TINGAY S.

Abstract (from CDS):

We 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 J1650-500 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 J1650-500 may be dominated by Compton processes (either inverse Comptonization of thermal disk photons and/or synchrotron self-Compton radiation 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 coworkers. Based on the properties of radio emission in the steep power-law state of XTE J1650-500 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.

Abstract Copyright:

Journal keyword(s): Accretion, Accretion Disks - Black Hole Physics - ISM: Jets and Outflows - Radio Continuum: Stars - Stars: Individual: Alphanumeric: GX 330-4 - Stars: Individual: Alphanumeric: XTE J1550-564 - Stars: Individual: Alphanumeric: XTE J1650-500 - Stars: Individual: Alphanumeric: XTE J1859+226

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* IL Lup HXB 15 47 08.2766679321 -47 40 10.284971214     11.96     ~ 426 1
2 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1062 0
3 EQ 1646-50 ? 16 50 -50.1           ~ 5 0
4 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 358 0
5 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
6 V* V1228 Sco LXB 17 19 58.990 -31 45 01.11           ~ 109 1
7 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 326 0
8 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2361 0
9 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 1004 1
10 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3996 0
11 V* V404 Cyg HXB 20 24 03.820 +33 52 01.90 14.50 14.20 12.7     K0IV 1125 0

    Equat.    Gal    SGal    Ecl

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2021.04.13-07:31:45

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