On the Properties of Inner Cool Disks in the Hard State of Black Hole X-Ray Transient Systems (2008)
Taam, Ronald E., Liu, B. F., Meyer, F., Meyer-Hofmeister, E.
The formation of a cool disk in the innermost regions of black hole X-ray transient systems in the low hard state is investigated. Taking into account the combined cooling associated with the Compton...
Low heat conduction in white dwarf boundary layers? (2008)
Liu, F. K., Meyer, F., Meyer-Hofmeister, E., Burwitz, V.
X-ray spectra of dwarf novae in quiescence observed by Chandra and XMM-Newton provide new information on the boundary layers of their accreting white dwarfs. Comparison of observations and models...
Variability in the cycle length of the supersoft source RX J0513.9-6951 (2008)
Burwitz, V., Reinsch, K., Greiner, J., Meyer-Hofmeister, E., Meyer, F., Walter, F. M., ...
The supersoft X-ray binary RX J0513.9-6951 shows cyclic changes between optical-low / X-ray-on states and optical-high / X-ray-off states. It is supposed to be accreting close to the...
Variability in the cycle length of the supersoft source RX J0513.9-6951 (2008)
Burwitz, V., Reinsch, K., Greiner, J., Meyer-Hofmeister, E., Meyer, F., Walter, F. M., ...
Variability in the cycle length of the supersoft source RX J0513.9-6951 (2008)
Burwitz, V., Reinsch, K., Greiner, J., Meyer-Hofmeister, E., Meyer, F., Walter, F. M., ...
The existence of inner cool disks in the low hard state of accreting black holes (2008)
Liu, B. F., Taam, Ronald E., Meyer, F., Meyer-Hofmeister, E.
The Existence of Inner Cool Disks in the Low Hard State of Accreting Black Holes (2007)
Liu, B. F., Taam, Ronald E., Meyer-Hofmeister, E., Meyer, F.
The condensation of matter from a corona to a cool, optically thick inner disk is investigated for black hole X-ray transient systems in the low hard state. A description of a simple model for the...
The existence of inner cool disks in the low/hard state of accreting black holes (2007)
Liu, B. F., Taam, Ronald E., Meyer-Hofmeister, E., Meyer, F.
Meyer, F., Liu, B. F., Meyer-Hofmeister, E.
Context: Accretion onto galactic and supermassive black holes occurs in different modes, which are documented in hard and soft spectral states, commonly attributed to an advection-dominated flow...
An inner disk below the ADAF: the intermediate spectral state of black hole accretion (2006)
Liu, B. F., Meyer-Hofmeister, E.
Aims: The hard and soft spectral states of black hole accretion are understood as connected with ADAF accretion (truncated disk) and standard disk accretion, respectively. However, observations...
The effect of heat conduction on the interaction of disk and corona around black holes (2005)
Meyer-Hofmeister, E., Meyer, F.
Heat conduction plays an important role in the balance between heating and cooling in many astrophysical objects, e.g. cooling flows in clusters of galaxies. Here we investigate the effect of heat...
Liu, B. F., Meyer, F., Meyer-Hofmeister, E.
In neutron star and black hole X-ray binaries the transitions between the two spectral states, hard and soft, signals the change between accretion via a hot advection-dominated flow(ADAF) and disk...
Hysteresis in the transition between hard and soft spectral states of low-mass X-ray binaries (2005)
Hysteresis in spectral state transitions - a challenge for theoretical modeling (2004)
Meyer-Hofmeister, E., Liu, B. F., Meyer, F.
Many low-mass X-ray binaries show both hard and soft spectral states. For several sources the transitions between these states have been observed, mostly from the soft to the hard state during a...
Why soft X-ray transients can remain in the low/hard state during outburst (2004)
In the canonical understanding of transient X-ray sources the accretion during quiescence occurs via a geometrically thin disk in the outer part and via an advection-dominated hot coronal flow/ADAF...
A cool disk in the Galactic Center? (2004)
Liu, B. F., Meyer, F., Meyer-Hofmeister, E.
We study the possibility of a cool disk existing in the Galactic Center in the framework of the disk-corona evaporation/condensation model. Assuming an inactive disk, a hot corona should form above...
The formation of the coronal flow/ADAF (2003)
Meyer-Hofmeister, E., Meyer, F.
We develop a new method to describe the accretion flow in the corona above a thin disk around a black hole in vertical and radial extent. The model is based on the same physics as the earlier...
Suleimanov, V., Meyer, F., Meyer-Hofmeister, E.
Detailed analysis of the lightcurve of CAL 87 clearly has shown that the high optical luminosity comes from the accretion disc rim and can only be explained by a severe thickening of the disc rim...
The effect of disk magnetic fields on the truncation of geometrically thin disks in AGN (2002)
Meyer, F., Meyer-Hofmeister, E.
We suggest that magnetic fields in the accretion disks of AGN reach into the coronae above and have a profound effect on the mass flow rate in the corona. This strongly affects the location where the...
Two-temperature coronal flow above a thin disk (2002)
Liu, B. F., Mineshige, S., Meyer, F., Meyer-Hofmeister, E., Kawaguchi, T.
We extended the disk corona model (Meyer & Meyer-Hofmeister 1994; Meyer, Liu, & Meyer-Hofmeister 2000a) to the inner region of galactic nuclei by including different temperatures in ions and...
The effect of disk magnetic fields on the truncation of geometrically thin disks in AGN (2002)
Meyer, F., Meyer-Hofmeister, E.
We suggest that magnetic fields in the accretion disks of AGN reach into the coronae above and have a profound effect on the mass flow rate in the corona. This strongly affects the location where the...
Two-temperature coronal flow above a thin disk (2002)
Liu, B. F., Mineshige, S., Meyer, F., Meyer-Hofmeister, E., Kawaguchi, T.
We extended the disk corona model to the inner region of galactic nuclei by including different temperatures in ions and electrons as well as Compton cooling. We found that the mass evaporation rate,...
Meyer-Hofmeister, E., Meyer, F.
We study the transition from the geometrically thin disk to the hot coronal flow for accretion onto black holes. The efficiency of evaporation determines the truncation of the geometrically thin disk...
A limit for the mass transfer rate in soft X-ray transients (2000)
Meyer-Hofmeister, E., Meyer, F.
Many black hole X-ray transients are in a low state for several decades until an outburst occurs. We interpret this outburst behaviour as a marginal occurrence of a dwarf nova type disk instability...
Black hole X-ray binaries: A new view on soft-hard spectral transitions (2000)
Meyer, F., Liu, B. F., Meyer-Hofmeister, E.
The theory of coronal evaporation predicts the formation of an inner hole in the cool thin accretion disk for mass accretion rates below a certain value (~ 1/50 of the Eddington mass accretion rate)...
Liu, B. F., Yuan, W., Meyer, F., Meyer-Hofmeister, E., Xie, G. Z.
We apply the disk-corona evaporation model (Meyer & Meyer-Hofmeister) originally derived for dwarf novae to black hole systems. This model describes the transition of a thin cool outer disk to a hot...
Late evolution of cataclysmic variables : the loss of AM Her systems (1999)
The white dwarf in AM Her systems is strongly magnetic and keeps in synchronous rotation with the orbit by magnetic coupling to the secondary star. As the latter evolves through mass loss to a cool,...
Late evolution of cataclysmic variables: the loss of AM Her systems (1999)
Meyer, F., Meyer-Hofmeister, E.
The white dwarf in AM Her systems is strongly magnetic and keeps in synchronous rotation with the orbit by magnetic coupling to the secondary star. As the latter evolves through mass loss to a cool,...
Black hole soft X-ray transients: evolution of the cool disk and mass supply for the ADAF (1999)
Meyer-Hofmeister, E., Meyer, F.
Using the black hole transient X-ray source A0620-00 as an example we study the physical interplay of three theoretical constituents for modelling these transient sources: (1) the advection-dominated...
On the ultimate fate of AM Her stars (1999)
. We suggest, that the magnetic field of the white dwarf in AM Her systems loses coupling to the secondary star when the latter becomes non-magnetic at the transition from a late main sequence star...
On the ultimate fate of AM Her stars (1999)
Meyer, F., Meyer-Hofmeister, E.
We suggest, that the magnetic field of the white dwarf in AM Her systems loses coupling to the secondary star when the latter becomes non-magnetic at the transition from a late main sequence star to...
On the source of viscosity in cool binary accretion disks (1999)
Meyer, F., Meyer-Hofmeister, E.
We suggest that the low viscosity in close binary accretion disks during quiescence is due to magnetic fields from the companion star. In very late evolutionary phase the companion stars become brown...
On the Source of Viscosity in Cool Binary Accretion Disks (1998)
. We suggest that the low viscosity in close binary accretion disks during quiescence is due to magnetic fields from the companion star. In very late evolutionary phase the companion stars become...
WZ Sagittae - an old dwarf nova (1998)
Meyer-Hofmeister, E., Meyer, F., Liu, B. F.
We model the evolution of the accretion disk of WZ Sagittae during the long quiescence. We find that the large amount of mass in the disk derived from the outburst luminosity is a severe constraint...
WZ Sagittae - an old dwarf nova (1998)
E. Meyer-hofmeister, F. Meyer, B. F. Liu
. We model the evolution of the accretion disk of WZ Sagittae during the long quiescence. We find that the large amount of mass in the disk derived from the outburst luminosity is a severe constraint...
Visual Light from the Eclipsing Supersoft X-Ray Source CAL 87 (1998)
S. Schandl, E. Meyer-hofmeister, F. Meyer
. We calculate the visual light curve of CAL 87 based on the assumption that an accreting steadily burning white dwarf irradiates the accretion disk and the secondary star, as suggested by van den...