Early Planet Formation in Embedded Disks (eDisk). I. Overview of the Program and First Results
Nagayoshi Ohashi, John J. Tobin, Jes K. J{\o}rgensen, Shigehisa, Takakuwa, Patrick Sheehan, Yuri Aikawa, Zhi-Yun Li, Leslie W. Looney,, Jonathan P. Willians, Yusuke Aso, Rajeeb Sharma, Jinshi Sai (Insa Choi),, Yoshihide Yamato, Jeong-Eun Lee, Kengo Tomida, Hsi-Wei Yen, Frankie J

TL;DR
This study uses ALMA to investigate early planet formation by examining substructures in disks around young protostars, finding fewer features than in more evolved disks, which informs understanding of disk evolution and planet formation timing.
Contribution
The paper presents initial results from the eDisk ALMA program, revealing the presence or absence of substructures in embedded disks and providing physical parameters of protostars.
Findings
Few substructures detected in embedded disks compared to Class II disks.
Keplerian disks and dynamical masses of protostars identified.
Differences suggest rapid development of substructures during disk evolution.
Abstract
We present an overview of the Large Program, ``Early Planet Formation in Embedded Disks (eDisk)'', conducted with the Atacama Large Millimeter/submillimeter Array (ALMA). The ubiquitous detections of substructures, particularly rings and gaps, in protoplanetary disks around T Tauri stars raise the possibility that at least some planet formation may have already started during the embedded stages of star formation. In order to address exactly how and when planet formation is initiated, the program focuses on searching for substructures in disks around 12 Class 0 and 7 Class I protostars in nearby (200 pc) star-forming regions through 1.3 mm continuum observations at a resolution of au (0.04"). The initial results show that the continuum emission, mostly arising from dust disks around the sample protostars, has relatively few distinctive substructures, such as rings and…
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Molecular Spectroscopy and Structure · Astro and Planetary Science
