Proto-planetary discs, the birth environment of planets, are an example of a structure
commonly found in astrophysics, accretion discs. Identifying the mechanism responsible for …

Planets form in disks of gas and dust around young stars. The disk molecular reservoirs and
their chemical evolution affect all aspects of planet formation, from the coagulation of dust …

High spatial resolution CO observations of midinclination (≈ 30–75) protoplanetary disks
offer an opportunity to study the vertical distribution of CO emission and temperature. The …

Context. In recent years, high-angular-resolution observations of the dust and gas content in
circumstellar discs have revealed a variety of morphologies, naturally triggering the question …

We present ALMA observations of CO J= 2− 1 and CS J= 5− 4 emission from the disk
around TW Hydrae. Both molecules trace a predominantly Keplerian velocity structure …

Protoplanetary disks surrounding young stars are the birth place of planets. Of particular
interest are the transition disks with large inner dust cavities of tens of au, hinting at the …

ABSTRACT The 1.33-mm survey of protoplanetary discs in the Taurus molecular cloud
found annular gaps and rings to be common in extended sources (≳ 55au), when their 1D …

Spiral arms are observed in numerous protoplanetary discs. These spiral arms can be
excited by companions, either on bound or unbound orbits. We simulate a scenario where …

Accreting protoplanets are windows into planet formation processes, and high-contrast
differential imaging is an effective way to identify them. We report results from the Giant …

Warps have often been used to explain disc properties, but well-characterized examples are
important due to their role in disc evolution. Scattered light images of discs with central gaps …