2018MNRAS.478.5159M


Query : 2018MNRAS.478.5159M

2018MNRAS.478.5159M - Mon. Not. R. Astron. Soc., 478, 5159-5173 (2018/August-3)

Radio-loudness in black hole transients: evidence for an inclination effect.

MOTTA S.E., CASELLA P. and FENDER R.P.

Abstract (from CDS):

Accreting stellar-mass black holes appear to populate two branches in a radio:X-ray luminosity plane. We have investigated the X-ray variability properties of a large number of black hole low-mass X-ray binaries, with the aim of unveiling the physical reasons underlying the radio-loud/radio-quiet nature of these sources, in the context of the known accretion-ejection connection. A reconsideration of the available radio and X-ray data from a sample of black hole X-ray binaries confirms that being radio-quiet is the more normal mode of behaviour for black hole binaries. In the light of this we chose to test, once more, the hypothesis that radio-loudness could be a consequence of the inclination of the X-ray binary. We compared the slope of the 'hard-line' (an approximately linear correlation between X-ray count rate and rms variability, visible in the hard states of active black holes), the orbital inclination, and the radio-nature of the sources of our sample. We found that high-inclination objects show steeper hard-lines than low-inclination objects, and tend to display a radio-quiet nature (with the only exception of V404 Cyg), as opposed to low-inclination objects, which appear to be radio-loud(er). While in need of further confirmation, our results suggest that - contrary to what has been believed for years - the radio-loud/quiet nature of black-hole low-mass X-ray binaries might be an inclination effect, rather than an intrinsic source property. This would solve an important issue in the context of the inflow-outflow connection, thus providing significant constraints to the models for the launch of hard-state compact jets.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: black holes - stars: jets - X-rays: binaries - X-rays: individual

Simbad objects: 28

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Number of rows : 28
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 1A 0620-00 HXB 06 22 44.5423857312 -00 20 44.290460544 10.60 11.40 11.2     K3V-K7V 1073 0
2 V* KV UMa HXB 11 18 10.7930420496 +48 02 12.314730120     12.25     K5V-M1V 768 0
3 V* BW Cir HXB 13 58 09.700 -64 44 05.80 17.90 18.00 16.9     ~ 217 1
4 MAXI J1543-564 XB* 15 43 17.3567740392 -56 24 49.118899500           ~ 49 0
5 V* IL Lup HXB 15 47 08.2768672752 -47 40 10.284587760     11.96     ~ 453 1
6 V* V381 Nor HXB 15 50 58.6637920704 -56 28 35.258385000   17.95 16.6     K3III 1102 0
7 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 468 0
8 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 370 0
9 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1797 1
10 MAXI J1659-152 LXB 16 59 01.680 -15 15 28.73           ~ 221 0
11 V* V821 Ara HXB 17 02 49.3876391280 -48 47 23.087954544 16.20 16.30 15.5     ~ 1946 0
12 [KRL2007b] 222 LXB 17 09 07.61 -36 24 25.7           ~ 245 1
13 IGR J17177-3656 LXB 17 17 39.0 -36 56 17           ~ 23 0
14 V* V1228 Sco LXB 17 19 58.990 -31 45 01.11           ~ 110 1
15 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 675 0
16 AX J1748.0-2829 LXB 17 48 05.060 -28 28 25.80     13.60     ~ 179 0
17 XTE J1752-223 LXB 17 52 15.090 -22 20 32.36           ~ 186 0
18 2MAXI J1753-013 LXB 17 53 28.2898766424 -01 27 06.256555272 15.30 16.73 16.46 16.15 15.64 ~ 330 0
19 2XMM J180112.4-254436 LXB 18 01 12.40 -25 44 36.1           ~ 376 1
20 [KRL2007b] 312 LXB 18 17 43.537 -33 01 07.80           ~ 151 0
21 MAXI J1836-194 XB* 18 35 43.440 -19 19 10.48           ~ 126 0
22 PBC J1842.3-1124 XB* 18 42 17.45 -11 25 03.9           ~ 24 0
23 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 347 0
24 [KRL2007b] 353 HXB 19 08 53.080 +09 23 04.84     15.80     ~ 101 0
25 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2461 0
26 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4135 0
27 V* V1408 Aql LXB 19 59 24.0074252040 +11 42 29.859773292 18.40 18.97 18.95 18.70 18.66 ~ 183 0
28 V* V404 Cyg HXB 20 24 03.8254458776 +33 52 01.962185735           G9/K0III/V 1189 0

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2022.09.26-07:57:07

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