Oral Presentation
Early Planet Formation in Embedded Disks (eDisk): Physical properties of embedded disks and their possible evolution
Presenter: Nagayoshi Ohashi (ASIAA)
Planet formation is one of the hottest topics in ALMA science, and its study will clearly benefit from new ALMA capabilities, including Band 1 and the Wideband Sensitivity Upgrade (WSU). Planets form within disks around young stellar objects (YSOs) during star formation. Over the past decades, intensive studies of protoplanetary disks around pre-main-sequence stars (Class II disks) have provided key insights into disk demographics, including their masses, sizes, and substructures. However, similar systematic studies of embedded disks around younger Class 0/I protostars remain scarce, despite growing evidence suggesting their importance for early planet formation.
Our ALMA Large Program, Early Planet Formation in Embedded Disks (eDisk), is the first systematic effort to study embedded disks in 19 nearby Class 0/I protostellar systems at high angular resolution (0.04"). Initial results indicate that, unlike Class II disks, embedded disks exhibit relatively few substructures such as rings or spirals. Further analysis has refined measurements of their masses, sizes, edge sharpness, and brightness asymmetries. These properties can be compared with the bolometric temperatures and masses of their central protostars to explore disk formation and evolution.
In this presentation, we will summarize the key physical properties of embedded disks and discuss potential scenarios for their formation and evolution.
asiaa.sinica.edu.tw