2005A&A...442..555L


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET09:57:34

2005A&A...442..555L - Astronomy and Astrophysics, volume 442, 555-562 (2005/11-1)

Spectral state transitions in low-mass X-ray binaries - the effect of hard and soft irradiation.

LIU B.F., MEYER F. and MEYER-HOFMEISTER E.

Abstract (from CDS):

In neutron star and black hole X-ray binaries the transitions between the two spectral states, hard and soft, signal the change between accretion via a hot advection-dominated flow (ADAF) and disk accretion. In a few cases the hard/soft transition was observed during the rise to the nova outburst, but in most cases only the soft/hard transition during the luminosity decrease. Surprisingly the luminosities at the second transition are always lower by a factor of 3 to 5. A model for this hysteresis was presented in a preceding paper where it was shown that this switch in the accretion mode at different mass accretion rates and therefore different luminosities is caused by the different amount of Compton cooling or heating of the accretion disk corona as it is irradiated by hard or soft radiation from the central light source, respectively. We now give detailed results for the dependence on the hardness of this radiation and the radiation efficiency. We further discuss the influence of the inclination and a possible warping of the disk on the observed hysteresis.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - black hole physics - X-rays: binaries - stars: neutron - stars: individual: Aql X-1, GX339-4, XTE J1550-564, XTE J1650-500

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V518 Per HXB 04 21 42.7231318463 +32 54 26.936934166 13.00 13.50 13.2     M4.5V 620 1
2 V* KV UMa HXB 11 18 10.7922353051 +48 02 12.319175505     12.25     K5V-M1V 713 0
3 V* GU Mus HXB 11 26 26.5947467816 -68 40 32.888148788   13.60 13.3     K3V-K7V 669 1
4 V* IL Lup HXB 15 47 08.2766679321 -47 40 10.284971214   15.50 14.9     A2V 409 1
5 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1003 0
6 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 817 1
7 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60           K4V 342 0
8 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1722 0
9 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 352 0
10 V* V2293 Oph LXB 17 19 36.930 -25 01 03.43   17.55 16.65     ~ 139 0
11 V* V2606 Oph NL* 17 42 40.030 -27 44 52.70     23.2     ~ 111 0
12 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 577 0
13 AX J1748.0-2829 LXB 17 48 05.060 -28 28 25.80           ~ 167 0
14 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 314 0
15 V* V1333 Aql LXB 19 11 16.05 +00 35 05.8 15.00 15.40 14.8     ~ 998 0
16 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3871 0
17 INTREF 1012 LXB 20 12 37.7593213138 +38 11 00.771841820     21.33     ~ 61 0

    Equat.    Gal    SGal    Ecl

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2020.01.29-09:57:34

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