The Astrophysical Journal (Jan 2023)
Early Planet Formation in Embedded Disks (eDisk). II. Limited Dust Settling and Prominent Snow Surfaces in the Edge-on Class I Disk IRAS 04302+2247
- Zhe-Yu Daniel Lin,
- Zhi-Yun Li,
- John J. Tobin,
- Nagayoshi Ohashi,
- Jes Kristian Jørgensen,
- Leslie W. Looney,
- Yusuke Aso,
- Shigehisa Takakuwa,
- Yuri Aikawa,
- Merel L. R. van’t Hoff,
- Itziar de Gregorio-Monsalvo,
- Frankie J. Encalada,
- Christian Flores,
- Sacha Gavino,
- Ilseung Han,
- Miyu Kido,
- Patrick M. Koch,
- Woojin Kwon,
- Shih-Ping Lai,
- Chang Won Lee,
- Jeong-Eun Lee,
- Nguyen Thi Phuong,
- Jinshi Sai (Insa Choi),
- Rajeeb Sharma,
- Patrick Sheehan,
- Travis J. Thieme,
- Jonathan P. Williams,
- Yoshihide Yamato,
- Hsi-Wei Yen
Affiliations
- Zhe-Yu Daniel Lin
- ORCiD
- University of Virginia, 530 McCormick Rd. , Charlottesville, VA 22903, USA ; [email protected]
- Zhi-Yun Li
- ORCiD
- University of Virginia, 530 McCormick Rd. , Charlottesville, VA 22903, USA ; [email protected]
- John J. Tobin
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Rd., Charlottesville, VA 22903, USA
- Nagayoshi Ohashi
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
- Jes Kristian Jørgensen
- ORCiD
- Niels Bohr Institute, University of Copenhagen , Øster Voldgade 5–7, DK-1350, Copenhagen K, Denmark
- Leslie W. Looney
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA
- Yusuke Aso
- ORCiD
- Korea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea
- Shigehisa Takakuwa
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan; Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University , 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065, Japan
- Yuri Aikawa
- ORCiD
- Department of Astronomy, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Merel L. R. van’t Hoff
- ORCiD
- Department of Astronomy, University of Michigan , 1085 S. University Ave., Ann Arbor, MI 48109-1107, USA
- Itziar de Gregorio-Monsalvo
- ORCiD
- European Southern Observatory, European Southern Observatory , Alonso de Cordova 3107, Casilla 19, Vitacura, Santiago, Chile
- Frankie J. Encalada
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA
- Christian Flores
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
- Sacha Gavino
- ORCiD
- Niels Bohr Institute, University of Copenhagen , Øster Voldgade 5–7, DK-1350, Copenhagen K, Denmark
- Ilseung Han
- ORCiD
- Korea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; Division of Astronomy and Space Science, University of Science and Technology , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- Miyu Kido
- ORCiD
- Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University , 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065, Japan
- Patrick M. Koch
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
- Woojin Kwon
- ORCiD
- Department of Earth Science Education, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; SNU Astronomy Research Center, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- Shih-Ping Lai
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan; Institute of Astronomy, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan; Center for Informatics and Computation in Astronomy, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan; Department of Physics, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
- Chang Won Lee
- ORCiD
- Korea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; Division of Astronomy and Space Science, University of Science and Technology , 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- Jeong-Eun Lee
- ORCiD
- Department of Physics and Astronomy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- Nguyen Thi Phuong
- ORCiD
- Korea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea; Department of Astrophysics, Vietnam National Space Center , Vietnam Academy of Science and Techonology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
- Jinshi Sai (Insa Choi)
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
- Rajeeb Sharma
- ORCiD
- Niels Bohr Institute, University of Copenhagen , Øster Voldgade 5–7, DK-1350, Copenhagen K, Denmark
- Patrick Sheehan
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Rd., Charlottesville, VA 22903, USA
- Travis J. Thieme
- ORCiD
- Institute of Astronomy, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan; Center for Informatics and Computation in Astronomy, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan; Department of Physics, National Tsing Hua University , No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
- Jonathan P. Williams
- ORCiD
- Institute for Astronomy, University of Hawai’i at Mānoa , 2680 Woodlawn Dr., Honolulu, HI 96822, USA
- Yoshihide Yamato
- ORCiD
- Department of Astronomy, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Hsi-Wei Yen
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
- DOI
- https://doi.org/10.3847/1538-4357/acd5c9
- Journal volume & issue
-
Vol. 951,
no. 1
p. 9
Abstract
While dust disks around optically visible, Class II protostars are found to be vertically thin, when and how dust settles to the midplane are unclear. As part of the Atacama Large Millimeter/submillimeter Array large program, Early Planet Formation in Embedded Disks, we analyze the edge-on, embedded, Class I protostar IRAS 04302+2247, also nicknamed the “Butterfly Star.” With a resolution of 0.″05 (8 au), the 1.3 mm continuum shows an asymmetry along the minor axis that is evidence of an optically thick and geometrically thick disk viewed nearly edge-on. There is no evidence of rings and gaps, which could be due to the lack of radial substructure or the highly inclined and optically thick view. With 0.″1 (16 au) resolution, we resolve the 2D snow surfaces, i.e., the boundary region between freeze-out and sublimation, for ^12 CO J = 2–1, ^13 CO J = 2–1, C ^18 O J = 2–1, H _2 CO J = 3 _0,3 –2 _0,2 , and SO J = 6 _5 –5 _4 , and constrain the CO midplane snow line to ∼130 au. We find Keplerian rotation around a protostar of 1.6 ± 0.4 M _⊙ using C ^18 O. Through forward ray-tracing using RADMC-3D, we find that the dust scale height is ∼6 au at a radius of 100 au from the central star and is comparable to the gas pressure scale height. The results suggest that the dust of this Class I source has yet to vertically settle significantly.
Keywords