Abstract The James Webb Space Telescope (JWST) is a large (6.6 m), cold (< 50 K), infrared
(IR)-optimized space observatory that will be launched early in the next decade into orbit …

Although fundamental for astrophysics, the processes that produce massive stars are not
well understood. Large distances, high extinction, and short timescales of critical …

High dust density in the midplane of protoplanetary disks is favorable for efficient grain
growth and can allow fast formation of planetesimals and planets, before disks dissipate …

Aims. We aim to study vertical settling and radial drift of dust in protoplanetary disks from a
different perspective: an edge-on view. An estimation of the amplitude of settling and drift is …

Flattened, rotating disks of cool dust and gas extending for tens to hundreds of astronomical
units are found around almost all low-mass stars shortly after their birth. These disks …

Context. The planet-forming region of protoplanetary disks is cold, dense, and therefore
weakly ionized. For this reason, magnetohydrodynamic (MHD) turbulence is thought to be …

We re-examine the observed near-infrared properties of T Tauri stars and interpret them with
the aid of accretion disk models. Based upon a careful analysis of the dereddened near …

We present a grid of radiation transfer models of axisymmetric young stellar objects (YSOs),
covering a wide range of stellar masses (from 0.1 to 50 M☉) and evolutionary stages (from …

We present results from the largest numerical simulation of star formation to resolve the
fragmentation process down to the opacity limit. The simulation follows the collapse and …

We discuss the properties of an accretion disk around a star with parameters typical of
classical T Tauri stars (CTTSs) and with the average accretion rate for these disks. The disk …