Spatially resolving dusty outflows with JWST/MIRI

Abstract

Dusty outflows may be an avenue for grain transport in protostellar systems. Such outflows from protostellar star-disk systems have been predicted to explain the crystallinity fractions of long-period comets by lifting thermally processed grains from the hot inner disk into the outflow. Sub-millimetre observations have been interpreted as supporting this view, revealing dust opacity indices β90% 0.1 μm grains. We argue that this is difficult to reconcile with the millimetre-sized grain interpretation of β = 0.41±0.16 measured at ~500 au in sub-mm surveys. We will discuss radiative transfer modelling that combines mid-infrared JWST observations with sub-mm ALMA observations of dusty outflows. Looking ahead, we will show preliminary results of a continuum survey of Class 0 sources, to move the mid-infrared study of dusty outflows to significant sample sizes. JWST and ALMA have the resolution and sensitivity to test the role of dusty outflows in embedded Class 0 systems, but we need to develop the analytical tools to interpret these observations.

Authors 4

1. Jakobus M. Vorster corresponding

   University of Helsinki

   Affiliation as printed

   Department of Physics, University of Helsinki, Helsinki, Finland (jakobus.vorster@helsinki.fi)

2. Mika J. Juvela

   University of Helsinki

   Affiliation as printed

   Department of Physics, University of Helsinki, Helsinki, Finland (jakobus.vorster@helsinki.fi)

3. Łukasz Tychoniec corresponding Aachen Leiden Observatory

   Leiden University · Leiden Observatory

   Affiliation as printed

   Leiden Observatory, Leiden University, Leiden, The Netherlands

4. A. Caratti o Garatti

   Astronomical Observatory of Rome · National Institute for Astrophysics

   Affiliation as printed

   INAF - Osservatorio Astronomico di Roma, Napoli, Italy