2013MNRAS.436..560C


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST15:50:16

2013MNRAS.436..560C - Mon. Not. R. Astron. Soc., 436, 560-569 (2013/November-3)

The effects of thermodynamic stability on wind properties in different low-mass black hole binary states.

CHAKRAVORTY S., LEE J.C. and NEILSEN J.

Abstract (from CDS):

We present a systematic theory-motivated study of the thermodynamic stability condition as an explanation for the observed accretion disc wind signatures in different states of low-mass black hole binaries (BHB). The variability in observed ions is conventionally explained either by variations in the driving mechanisms or by the changes in the ionizing flux or due to density effects, whilst thermodynamic stability considerations have been largely ignored. It would appear that the observability of particular ions in different BHB states can be accounted for through simple thermodynamic considerations in the static limit. Our calculations predict that in the disc-dominated soft thermal and intermediate states, the wind should be thermodynamically stable and hence observable. On the other hand, in the power-law-dominated spectrally hard state the wind is found to be thermodynamically unstable for a certain range of 3.55 ≤ logξ ≤ 4.20. In the spectrally hard state, a large number of the He-like and H-like ions (including e.g. Fexxv, Arxviii and Sxv) have peak ion fractions in the unstable ionization parameter (ξ) range, making these ions undetectable. Our theoretical predictions have clear corroboration in the literature reporting differences in wind ion observability as the BHBs transition through the accretion states While this effect may not be the only one responsible for the observed gradient in the wind properties as a function of the accretion state in BHBs, it is clear that its inclusion in the calculations is crucial for understanding the link between the environment of the compact object and its accretion processes.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): accretion, accretion discs - black hole physics - binaries: spectroscopic - stars: winds, outflows - X-rays: binaries - X-rays: stars

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 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 134 2
2 X LMC X-4 HXB 05 32 49.5558669817 -66 22 13.202534152   13.9 14.0     O8III 618 0
3 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 887 0
4 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1388 0
5 V* BR Cir HXB 15 20 40.85 -57 10 00.1   21.4 21.4     ~ 734 1
6 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 358 0
7 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1751 1
8 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
9 [KRL2007b] 222 LXB 17 09 07.61 -36 24 25.7           ~ 220 1
10 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 631 0
11 IGR J17480-2446 LXB 17 48 04.831 -24 46 48.87           ~ 157 0
12 V* V5512 Sgr LXB 18 14 31.55 -17 09 26.7     12.73     K5III 359 0
13 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2361 0
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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2021.04.19-15:50:16

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