2008A&A...491..267S


Query : 2008A&A...491..267S

2008A&A...491..267S - Astronomy and Astrophysics, volume 491, 267-277 (2008/11-3)

Modeling of non-stationary accretion disks in X-ray novae A0620-00 and GRS1124-68 during outburst.

SULEIMANOV V.F., LIPUNOVA G.V. and SHAKURA N.I.

Abstract (from CDS):

We address the task of modeling soft X-ray and optical light curves of X-ray novae in the high/soft state. The analytic model of viscous evolution of an externally truncated accretion α-disk is used. Relativistic effects near a Kerr black hole and self-irradiation of an accretion disk are taken into account. The model is applied to the outbursts of X-ray nova Monocerotis 1975 (A0620-00) and X-ray nova Muscae 1991 (GRS1124-68). Comparison of observational data with the model yields constraints on the angular momentum (the Kerr parameter) of the black holes in A0620-00 and GRS1124-68: 0.3-0.6 and ≤0.4, and on the viscosity parameter α of the disks: 0.7-0.95 and 0.55-0.75. We also conclude that the accretion disks should have an effective geometrical thickness 1.5-2 times greater than the theoretical value of the distance between the photometric layers.

Abstract Copyright:

Journal keyword(s): binaries: close - X-rays: binaries - stars: individual: Nova Mon 1975 - stars: individual: Nova Mus 1991

CDS comments: M33 X-7 = [LDC81] 7

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 155 2
2 X LMC X-3 HXB 05 38 56.6323605504 -64 05 03.317937504   17 17.2     B2.5Ve 661 0
3 1A 0620-00 HXB 06 22 44.5423857312 -00 20 44.290460544 10.60 11.40 11.2     K3V-K7V 1093 0
4 V* GU Mus HXB 11 26 26.5961559600 -68 40 32.877752952           K3V-K7V 700 1
5 V* IL Lup HXB 15 47 08.2768672752 -47 40 10.284587760     11.96     ~ 469 1
6 V* V381 Nor HXB 15 50 58.6637920704 -56 28 35.258385000   17.95 16.6     K3III 1135 0
7 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1837 1
8 V* V821 Ara HXB 17 02 49.3876391280 -48 47 23.087954544 16.20 16.30 15.5     ~ 1996 0
9 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2530 0

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2023.06.04-19:18:14

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