2015MNRAS.448.3339H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST14:36:11

2015MNRAS.448.3339H - Mon. Not. R. Astron. Soc., 448, 3339-3347 (2015/April-3)

Power colours: simple X-ray binary variability comparison.

HEIL L.M., UTTLEY P. and KLEIN-WOLT M.

Abstract (from CDS):

We demonstrate a new method of variability classification using observations of black hole X-ray binaries. Using `power colours' - ratios of integrated power in different Fourier frequency bands - we can clearly differentiate different canonical black hole states as the objects evolve during outburst. We analyse ( ∼ 2400) Rossi X-ray Timing Explorer observations of 12 transient low-mass black hole X-ray binaries and find that the path taken around the power colour-colour diagram as the sources evolve is highly consistent from object to object. We discuss how the consistency observed in the power colour-colour diagram between different objects allows for easy state classification based on only a few observations, and show how the power-spectral shapes can be simply classified using a single parameter, the power-spectral `hue'. To illustrate the benefits of our simple model-independent approach, we show that the persistent high-mass X-ray binary Cyg X-1 shows very similar power-spectral evolution to the transient black hole sources, with the main difference being caused by a combination of a lack of quasi-periodic oscillations and an excess of low-frequency power-law noise in the Cyg X-1 power spectra during the transitional state. We also compare the transient objects to the neutron star atoll source Aquila X-1, demonstrating that it traces a different path in the power colour-colour plot. Thus, power colours could be an effective method to classify newly discovered X-ray binaries.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): X-rays: binaries - X-rays: general - X-rays: individual: Cygnus X-1 - X-rays: individual: Aquila X-1

Simbad objects: 14

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Number of rows : 14

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* KV UMa HXB 11 18 10.7922353051 +48 02 12.319175505     12.25     K5V-M1V 737 0
2 V* BW Cir HXB 13 58 09.700 -64 44 05.80 17.90 18.00 16.9     ~ 202 1
3 V* IL Lup HXB 15 47 08.2766679321 -47 40 10.284971214     11.96     ~ 426 1
4 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1062 0
5 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 358 0
6 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1751 1
7 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
8 V* V1228 Sco LXB 17 19 58.990 -31 45 01.11           ~ 109 1
9 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 631 0
10 XTE J1752-223 LXB 17 52 15.090 -22 20 32.36           ~ 168 0
11 [KRL2007b] 312 LXB 18 17 43.537 -33 01 07.80           ~ 143 0
12 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 326 0
13 X Aql X-1 LXB 19 11 16.0572031521 +00 35 05.876658556           ~ 1040 1
14 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3997 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-14:36:11

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