Credit: ALMA (ESO/NAOJ/NRAO), Ohashi et al.

 

Project Overview

Protoplanetary disks have been considered as the sites of planet formation. 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 eDisk 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 ~7 AU (0.”04). Kinematic information obtained through CO isotopologue lines and other lines reveals the presence of Keplerian disks around protostars, providing us with crucial physical parameters, in particular, the dynamical mass of the central protostars.

 

Project Summary Table

Project code	Title	PIs
2019.1.00261.L	Early Planet Formation in Embedded Disks	Nagayoshi Ohashi, Jes K. Jørgensen, John J. Tobin

 

Deliveries

The delivered data products, which are in preparation, are:

1. CASA scripts and associated python modules used to calibrate and image the data

2. calibrated visibility data from each execution block, including those from the ALMA archive

3. continuum images created from combined visibility data with a robust value of 0.5

4. line cube images created from combined visibility data with a robust value of 0.5

5. fits file of the primary beam for each image mentioned above

 

PI

• Nagayoshi Ohashi (Academia Sinica Institute of Astronomy & Astrophysics)

Co-PIs

• Jørgensen, Jes K. (Niels Bohr Institute)
• Tobin, John J. (National Radio Astronomy Observatory)

Co-Is

• Aikawa, Yuri (University of Tokyo)
• Aso, Yusuke (Korea Astronomy and Space Science Institute)
• de Gregorio-Monsalvo, Itziar (European Southern Observatory)
• Koch, Patrick (Academia Sinica Institute of Astronomy & Astrophysics)
• Kwon, Woojin (Seoul National University)
• Lai, Shih-Ping (National Tsing Hua University)
• Lee, Chang-Won (Korea Astronomy and Space Science Institute)
• Lee, Jeong-Eun (Seoul National University)
• Li, Zhi-Yun (University of Virginia)
• Looney, Leslie (University of Illinois)
• Plunkett Adele (National Radio Astronomy Observatory)
• Saigo, Kazuya (Kagoshima University)
• Sheehan, Patrick (National Radio Astronomy Observatory)
• Takakuwa, Shigehisa (Kagoshima University)
• Tomida, Kengo (Tohoku University)
• Williams, Jonathan (University of Hawai‘i at Manoa)
• Yen, Hsi-Wei (Academia Sinica Institute of Astronomy & Astrophysics)

Full membership, including associates and affiliates, is available at http://group.asiaa.sinica.edu.tw/almaLP_edisk/people.php

 

Publications

Ohashi, N., Tobin, J. J., Jørgensen, J. K. et al. eDisk I. Overview of the Program and First Results

Lin, Z.-Y. D., Li, Z.-Y., Tobin, J. J. et al. eDisk II. Limited Dust Settling and Prominent Snow Surfaces in the Edge-on Class I Disk IRAS 04302+2247

van ’t Hoff, M. L. R., Tobin, J. J., Li, Z.-Y. et al. eDisk III. A First High-resolution View of Submillimeter Continuum and Molecular Line Emission toward the Class 0 Protostar L1527 IRS

Yamato, Y., Aikawa, Y., Ohashi, N. et al. eDisk IV. The Ringed and Warped Structure of the Disk around the Class I Protostar L1489 IRS

Kido, M., Takakuwa, S., Saigo, K. et al. eDisk VII. Keplerian Disk, Disk Substructure, and Accretion Streamers in the Class 0 Protostar IRAS 16544–1604 in CB 68

Sai, J., Yen, H.-W., Ohashi, N. et al. eDisk V. Possible Annular Substructure in a Circumstellar Disk in the Ced 110 IRS4 System (submitted)

Aso, Y., Kwon W., Ohashi, N. et al. eDisk VI. Kinematic Structure around the Very Low Mass Protostar IRAS 16253–2429 (submitted)

Thieme, T. J., Lai, S.-P., Ohashi, N. et al. eDisk VIII. A Small Protostellar Disk around the Extremely Low-mass and Young Class 0 Protostar, IRAS 15398–3359 (submitted)

Sharma, R., Jørgensen, J. K., Gavino, S. et al. eDisk IX. High-resolution ALMA Observations of the Class 0 Protostar R CrA IRS 5N and its Surrounding (submitted)

Narayanan, S., Williams, J., Tobin, J. J. et al. eDisk X. Compact Disks, Extended Infall, and a Fossil Outburst in the Class I Oph IRS 43 Binary (submitted)

Gavino, S., Jørgensen, J. K., Sharma, R. et al. eDisk XI. A First High-resolution View of Dust Continuum, Envelope, and Outflows toward the BHR 71 Class 0 Protostellar Binary (submitted)