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 Herbig Ae/Be stars are young contracting stars on the radiative track in the HR
diagram on their way to the main sequence. These stars provide a valuable link between …

The formation of gaseous giant planets is thought to occur in the first few million years after
stellar birth. Models predict that the process produces a deep gap in the dust component …

Transitional disks are objects whose inner disk regions have undergone substantial
clearing. The Spitzer Space Telescope produced detailed spectral energy distributions …

Context. With the Herschel Space Observatory, lines of simple molecules (C+, O, and high-J
lines of CO, J up≳ 14) have been observed in the atmosphere of protoplanetary disks. When …

Context. One of the methods for deriving disk masses relies on direct observations of the
gas, whose bulk mass is in the outer cold regions (T≲ 30 K). This zone can be well traced by …

ABSTRACT We present a Spitzer InfraRed Spectrometer search for 10–36 μm molecular
emission from a large sample of protoplanetary disks, including lines from H 2 O, OH, C 2 H …

We study the influence of transport processes on the chemical evolution of DM Tau-like
protoplanetary disks. Turbulent transport of gases and ices is implicitly modeled in full two …

We observed a sample of 20 representative Herbig Ae/Be stars and 5 A-type debris discs
with PACS onboard Herschel, as part of the GAS in Protoplanetary Systems (GASPS) …

Context. Transition disks are recognized by the absence of emission of small dust grains
inside a radius of up to several 10s of AUs. Owing to the lack of angular resolution and …