2003A&A...409..697M


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.25CET10:34:15

2003A&A...409..697M - Astronomy and Astrophysics, volume 409, 697-706 (2003/10-2)

Do X-ray binary spectral state transition luminosities vary?

MACCARONE T.J.

Abstract (from CDS):

We tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and good mass estimates for the compact star. We show that the state transition luminosities are at about 1-4% of the Eddington rate, markedly smaller than those typically quoted in the literature, with a mean value of 2%. Only the black hole candidate GRO J1655-40 and the neutron star systems Aql X-1 and 4U 1728-34 have measured state transition luminosities inconsistent with this value at the 1σ level. GRO J1655-40, in particular, shows a state transition luminosity below the mean value for the other sources at the 4σ level. This result, combined with the known inner disk inclination angle (the disk is nearly parallel to the line of sight) from GRO J1655-40's relativistic jets suggest that the hard X-ray emitting region in GRO J1655-40 can have a velocity of no more than about β=0.68, with a most likely value of about β=0.52, and a minimum speed of β=0.45, assuming that the variations in state transition luminosities are solely due to relativistic beaming effects. The variance in the state transition luminosities suggests an emission region with a velocity of ∼0.2c. The results are discussed in terms of different emission models for the low/hard state. We also discuss the implications for measuring the dimensionless viscosity parameter α. We also find that if its state transitions occur at typical luminosities, then GX 339-4 is likely to be at a distance of at least 7.6kpc, much further than typically quoted estimates.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - binaries, close - stars: neutron - black hole physics

CDS comments: XTE J1806-276 is a misprint for XTE J1806-246. XN Oph 77 = NOVA Oph 1977.

Simbad objects: 37

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Number of rows : 37

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 X LMC X-3 HXB 05 38 56.6325045489 -64 05 03.321118015   17 17.2     B2.5Ve 626 0
3 V* V1055 Ori LXB 06 17 07.3 +09 08 13   18.80 18.5     ~ 505 1
4 1A 0620-00 HXB 06 22 44.5420315454 -00 20 44.289428950 10.60 11.40 11.2     K3V-K7V 1035 0
5 V* MM Vel HXB 10 13 36.4107940553 -45 04 32.555813596   14.84 14.71     G5V-M0V 183 0
6 V* KV UMa HXB 11 18 10.7922353051 +48 02 12.319175505     12.25     K5V-M1V 715 0
7 V* GU Mus HXB 11 26 26.5947467816 -68 40 32.888148788   13.60 13.3     K3V-K7V 669 1
8 V* BR Cir HXB 15 20 40.85 -57 10 00.1   21.4 21.4     ~ 713 1
9 V* IL Lup HXB 15 47 08.2766679321 -47 40 10.284971214   15.50 14.9     A2V 409 1
10 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1004 0
11 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 818 1
12 V* V801 Ara LXB 16 40 55.5 -53 45 05 17.50 18.20 17.5     ~ 780 1
13 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1682 1
14 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1726 0
15 V* V2107 Oph HXB 17 08 14.520 -25 05 30.15   16.50 15.9     K3V-K7V 211 1
16 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 352 0
17 4U 1722-30 LXB 17 27 33.25 -30 48 07.4           ~ 233 1
18 V* V2216 Oph LXB 17 31 44.17 -16 57 40.9 16.40 17.10 16.8     ~ 261 1
19 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5           ~ 753 1
20 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 391 0
21 1RXS J173546.9-302859 LXB 17 35 46.88 -30 29 00.4           ~ 66 1
22 V* V926 Sco LXB 17 38 58.3 -44 27 00 16.90 17.70 17.5     ~ 425 0
23 X Sgr X-1 LXB 17 47 56.0 -26 33 49           ~ 344 0
24 4U 1746-371 LXB 17 50 12.66 -37 03 08.2           ~ 181 1
25 X Sgr X-3 LXB 18 01 32.3 -20 31 44           ~ 218 1
26 2S 1803-245 LXB 18 06 50.72 -24 35 28.6           ~ 70 0
27 V* V5512 Sgr LXB 18 14 31.55 -17 09 26.7           K5III 347 0
28 V* V4641 Sgr HXB 18 19 21.6342721789 -25 24 25.849323550     13.654   13.092 B9III 382 1
29 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 898 1
30 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 314 0
31 V* V1333 Aql LXB 19 11 16.05 +00 35 05.8 15.00 15.40 14.8     ~ 1001 0
32 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2250 0
33 V* V1405 Aql LXB 19 18 47.871 -05 14 17.09 20.90 21.40 21.0     ~ 437 0
34 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3878 0
35 V* QZ Vul HXB 20 02 49.58 +25 14 11.3   19.64 18.2     K3V-K6V 396 0
36 V* V404 Cyg HXB 20 24 03.820 +33 52 01.90 14.50 14.20 12.7     K0IV 1071 0
37 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 141 0

    Equat.    Gal    SGal    Ecl

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2020.02.25-10:34:15

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