Interstellar interlopers are bodies formed outside of the Solar System but observed passing
through it. The first two identified interlopers, 1I/'Oumuamua and 2I/Borisov, exhibited …

The latest observation of HL Tau by ALMA revealed spectacular concentric dust rings in its
circumstellar disk. We attempt to explain the multiple ring structure as a consequence of …

Accumulation of dust and ice particles into planetesimals is an important step in the planet
formation process. Planetesimals are the seeds of both terrestrial planets and the solid cores …

Context. Several barriers have been proposed in planetesimal formation theory: bouncing,
fragmentation, and radial drift problems. Understanding the structure evolution of dust …

Context. Protoplanetary disks are vital objects in star and planet formation, possessing all
the material, gas and dust, which may form a planetary system orbiting the new star. Small …

Standard accretion disk models suggest that the snow line in the solar nebula migrated
interior to the Earth's orbit in a late stage of nebula evolution. In this late stage, a significant …

Context. Collisional growth of dust aggregates is an essential process in forming
planetesimals in protoplanetary disks, but disruption through high-velocity collisions …

Context. Dust grains coagulate to form dust aggregates in protoplanetary disks. Their
porosity can be extremely high in the disks. Although disk emission may come from fluffy …

We present new determinations of disk surface density, independent of an assumed dust
opacity, for a sample of seven bright, diverse, protoplanetary disks using measurements of …

Context. Streaming instability can be a very efficient way of overcoming growth and drift
barriers to planetesimal formation. However, it was shown that strong clumping, which leads …