2001A&A...372..508M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST10:10:54

2001A&A...372..508M - Astronomy and Astrophysics, volume 372, 508-515 (2001/6-3)

Black hole X-ray transients: Mass accumulation in the disk - constraints for the viscosity.

MEYER-HOFMEISTER E. and MEYER F.

Abstract (from CDS):

The outburst cycles of black hole X-ray transients are now generally understood as caused by a thermal instability in the accretion disk, the same mechanism as in dwarf novae outbursts. During quiescence the accretion occurs via a cool disk in the outer region but changes to a coronal flow/ADAF in the inner region. The transition to the coronal flow is caused by evaporation of matter from the cool disk. This process is an important feature for the disk evolution. We point out that if the disk is depleted during the outburst, e.g. by irradiation, its evolution during quiescence is independent of the detailed outburst luminosity decline. The mass accumulation during quiescence has to meet several constraints as the accretion rate, the recurrence time and the total outburst energy. We present a critical discussion of different ways to model X-ray transient outburst cycles and compare with the requirements from observations. For the case of only little mass left over after the outburst the observations indicate a frictional parameter in the cool disk of order αcold=0.05, similar to that in dwarf nova disks during quiescence, with no need to resort to much lower α values of order 0.005.

Abstract Copyright:

Journal keyword(s): accretion disks - black hole physics - X-rays: stars - stars: individual: A0620-00, Nova Vul 1988, Nova Mus 1991, 4U 1630-472

Simbad objects: 9

goto Full paper

goto View the reference in ADS

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 - 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 1A 0620-00 HXB 06 22 44.5420315454 -00 20 44.289428950 10.60 11.40 11.2     K3V-K7V 1040 0
3 V* GU Mus HXB 11 26 26.5947467816 -68 40 32.888148788           K3V-K7V 670 1
4 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 418 0
5 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1699 1
6 V* V2107 Oph HXB 17 08 14.520 -25 05 30.15   16.50 15.9     K3V-K7V 211 1
7 V* QZ Vul HXB 20 02 49.58 +25 14 11.3   19.64 18.2     K3V-K6V 398 0
8 V* WZ Sge DN* 20 07 36.5036203067 +17 42 14.733657651   15.30 15.20     DAepv 888 0
9 V* V404 Cyg HXB 20 24 03.820 +33 52 01.90 14.50 14.20 12.7     K0IV 1089 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...372..508M and select 'bookmark this link' or equivalent in the popup menu


2020.07.05-10:10:54

© Université de Strasbourg/CNRS

    • Contact