Debris disks are tenuous, dust-dominated disks commonly observed around stars over a
wide range of ages. Those around main sequence stars are analogous to the Solar System's …

We explain the axisymmetric gaps seen in recent long-baseline observations of the HL Tau
protoplanetary disc with the Atacama Large Millimetre/Submillimetre Array (ALMA) as being …

Many white dwarf stars show signs of having accreted smaller bodies, implying that they
may host planetary systems. A small number of these systems contain gaseous debris discs …

We report the results of a∼ 4 yr direct imaging survey of 104 stars to resolve and
characterize circumstellar debris disks in scattered light as part of the Gemini Planet Imager …

Planet formation is thought to occur in discs around young stars by the aggregation of small
dust grains into much larger objects. The growth from grains to pebbles and from …

The instability in protoplanetary disks due to gas–dust friction and self-gravity of gas and
dust is investigated using linear analysis. In the case where the dust-to-gas ratio is …

An increasing number of observations have shown that gaseous debris discs are not an
exception. However, until now, we only knew of cases around A stars. Here we present the …

Context. HR 4796 A is surrounded by a debris disc, observed in scattered light as an
inclined ring with a high surface brightness. Past observations have raised several …

The streaming instability for solid particles in protoplanetary disks is reexamined assuming
the familiar alpha (α) model for isotropic turbulence. Turbulence always reduces the growth …

We study particle trap** at the edge of a gap opened by a planet in a protoplanetary disk.
In particular, we explore the effects of turbulence driven by the magnetorotational instability …