Oral Presentation
Unveiling the Vertical Dust Temperature Structure of Protostellar Disks through Multi-band Observations
Presenter: Kazuya Saigo (NAOJ/Kagoshima University)
In recent years, it has been widely recognized that understanding protostellar disks is key to understanding star and planet formation. Protostellar disks actively undergo mass accretion onto the protostar and launch powerful outflows. At the same time, recent ALMA survey observations (e.g., the DSHARP project) suggest that planet formation is already underway in such protostellar disks. Theoretically, various physical processes, such as magnetic turbulence and dead zone, Joule heating, dust growth, and structure formation due to gravitational instability, are suggested to occur within protostellar disks.? However, observationally, our understanding of the interiors of protostellar disks remains very limited.? The eDisk Project, an ALMA Band 6 high-resolution survey of nearby protostellar disks, has revealed nature of protostellar disks. As part of the eDisk project, we have conducted radiative transfer modeling using RADMC-3D to analyze the kinematic structures of protostellar disks. Our study has revealed that (i) a protostellar disk has a flared structure, and that dust settling has not occurred significantly, and (ii) viscous heating is necessary to reproduce the observed intensity profile (Takakuwa, KS, et al. 2024). In this talk, I will report that by extending this pioneering research to model analysis using multi-wavelength EVLA/ALMA observations, we will obtain important information on the 3D temperature structure within protostellar disks. In particular, high-resolution observations in Band 1 are important as they may impose strong constraints on theoretical models of the temperature structure of protostellar disks.?
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