Molecular hydrogen is the most abundant molecule in the universe. It is the first one to form
and survive photo-dissociation in tenuous environments. Its formation involves catalytic …

Context. Water is a key molecule in the physics and chemistry of star and planet formation,
but it is difficult to observe from Earth. The Herschel Space Observatory provided …

We present a new model of interstellar dust in which large grains are a single composite
material," astrodust," and nanoparticle-sized grains come in distinct varieties including …

The dielectric function of interstellar dust material is modeled using observations of
extinction and polarization in the infrared, together with estimates for the mass of interstellar …

We measured the mid-infrared (MIR) extinction using Spitzer photometry and spectroscopy
(3.6–37 μm) for a sample of Milky Way sight lines (mostly) having measured ultraviolet …

Context. Analyzing the properties of dust and its evolution in the early phases of star
formation is crucial to put constraints on the collapse and accretion processes as well as on …

Clouds of gas and dust in the Galaxy are nurseries in which stars and planetary systems are
born. During their journey from the diffuse interstellar medium to the protoplanetary disks …

Context. Observations of interstellar material infalling onto star-and planet-forming systems
have become increasingly common thanks to recent advancements in radio interferometry …

Context. The degree of coupling between the gas and the magnetic field during the collapse
of a core and the subsequent formation of a disk depends on the assumed dust size …

Context. Early dust grain growth in protostellar envelopes infalling on young disks has been
suggested in recent studies, supporting the hypothesis that dust particles start to …