I review the basics of the disc instability model (DIM) for dwarf novae and soft-X-ray
transients and its most recent developments, as well as the current limitations of the model …

We report the completion of a survey of radio-loud active galactic nuclei (AGNs) begun in an
earlier paper with the main goal of finding and studying broad, double-peaked Balmer lines …

We have summarized the current understanding and recently obtained findings about WZ
Sge-type dwarf novae. We also reviewed the historical development of the understanding of …

Debris discs which orbit white dwarfs are signatures of remnant planetary systems. We
present 12 yr of optical spectroscopy of the metal-polluted white dwarf SDSS J1228+ 1040 …

We show that dwarf nova disks in quiescence have rather low magnetic Reynolds numbers,
of order 10 3. Numerical simulations of magnetized accretion disks suggest that under these …

Simulations and analytic arguments suggest that the turbulence driven by magnetorotational
instability (MRI) in accretion discs can amplify the toroidal (azimuthal) component of the …

We study the evolution of the broad, double-peaked H α emission-line profile of the
LINER/Seyfert 1 nucleus of NGC 1097, using 24 spectra obtained over a time span of 11 …

We present up to two decades of spectroscopic monitoring of the double-peaked broad Hα
emission lines of seven broad-line radio galaxies. These extremely broad, double-peaked …

About half of the binary systems are close enough to each other for mass to be exchanged
between them at some point in their evolution, yet the accretion mechanism in wind …

I review the method of Doppler tomography which translates binary-star line profiles taken at
a series of orbital phases into a distribution of emission over the binary. I begin with a …