[P-CG21] Origin and evolution of materials in space

[PCG21-01] Protoplanetary dust grains seen with JWST: Current status and future prospects

★Invited Papers

*Ryo Tazaki¹ (1.University of Tokyo)

With the James Webb Space Telescope (JWST), infrared astronomy has entered a new era. In the observational study of dust grains in planet-forming regions, a variety of significant results are beginning to emerge. JWST is equipped with imaging and spectroscopic instruments covering the near- to mid-infrared wavelengths, which are being actively utilized for high spatial-resolution imaging and spectroscopic studies of dust grains in planet-forming regions. In particular, numerous results have been reported from observations of edge-on disks, where the central star is obscured by the disk, making observations relatively straightforward. We have also carried out an imaging survey of edge-on protoplanetary disks during Cycle 1+2 using near- and mid-infrared imaging observations.

In this presentation, I will focus primarily on dust observations in protoplanetary disks and summarize the initial results obtained with JWST. First, I will review the observational outcomes of four edge-on protoplanetary disks we have studied (Tau 042021, Oph 163131, IRAS 04302, and HH 30). In addition, I will introduce the findings from multiband imaging and spectroscopic observations of volatile ices and refractory materials, as well as results concerning mid-infrared variability. Finally, I will address the current challenges based on these observations and discuss future prospects.