Early Planet Formation in Embedded Disks (eDisk). XIX. Structures of molecular outflows
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| Format: | Preprint |
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2025
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| _version_ | 1866910106546864128 |
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| author | Feeney-Johansson, Anton Aikawa, Yuri Takakuwa, Shigehisa Ohashi, Nagayoshi Plunkett, Adele Jorgensen, Jes K. Shang, Hsien Li, Zhi-Yun Sharma, Rajeeb Kwon, Woojin Lee, Jeong-Eun Looney, Leslie W. Yang, Yao-Lun Narang, Mayank de Gregorio-Monsalvo, Itziar team, eDisk |
| author_facet | Feeney-Johansson, Anton Aikawa, Yuri Takakuwa, Shigehisa Ohashi, Nagayoshi Plunkett, Adele Jorgensen, Jes K. Shang, Hsien Li, Zhi-Yun Sharma, Rajeeb Kwon, Woojin Lee, Jeong-Eun Looney, Leslie W. Yang, Yao-Lun Narang, Mayank de Gregorio-Monsalvo, Itziar team, eDisk |
| contents | As part of the ALMA Large Program "Early Planet Formation in Embedded Disks" (eDisk), 12CO (2 - 1) was observed towards 19 nearby low-mass protostars. Of these objects, 15 sources are found to show molecular outflow emission. Based on their morphological and kinematical structures, the CO outflows are classified into three types: a wind-driven shell, where ambient material is swept up by a wide-angle wind from the star, a bow shock, and a slow disk wind, which is a conical or parabolic flow with onion-like velocity structure. We categorize 11 outflows as a slow disk wind, 7 as a wind-driven shell, and 1 as a bow shock. Four of these outflows were found to show signs of both slow disk wind and wind-driven shell characteristics. Five objects show misalignment between the red- and blue-shifted outflows. Seven objects show significant misalignment between the outflow axis (either or both of the red- and blue-shifted outflows) and the minor axis of the dust continuum emission around the protostar. For the objects showing wind-driven shell emission, we compare simple parametrized models with the observations to derive physical properties of the observed shells, such as their dynamical ages. This shows evidence of a time variability in the outflows, such as changes in their direction. In some objects, large differences are seen between the properties of the red- and blue-shifted outflows, possibly indicating differences in the properties of the ambient medium with which the outflow interacts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_21454 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Early Planet Formation in Embedded Disks (eDisk). XIX. Structures of molecular outflows Feeney-Johansson, Anton Aikawa, Yuri Takakuwa, Shigehisa Ohashi, Nagayoshi Plunkett, Adele Jorgensen, Jes K. Shang, Hsien Li, Zhi-Yun Sharma, Rajeeb Kwon, Woojin Lee, Jeong-Eun Looney, Leslie W. Yang, Yao-Lun Narang, Mayank de Gregorio-Monsalvo, Itziar team, eDisk Solar and Stellar Astrophysics Astrophysics of Galaxies As part of the ALMA Large Program "Early Planet Formation in Embedded Disks" (eDisk), 12CO (2 - 1) was observed towards 19 nearby low-mass protostars. Of these objects, 15 sources are found to show molecular outflow emission. Based on their morphological and kinematical structures, the CO outflows are classified into three types: a wind-driven shell, where ambient material is swept up by a wide-angle wind from the star, a bow shock, and a slow disk wind, which is a conical or parabolic flow with onion-like velocity structure. We categorize 11 outflows as a slow disk wind, 7 as a wind-driven shell, and 1 as a bow shock. Four of these outflows were found to show signs of both slow disk wind and wind-driven shell characteristics. Five objects show misalignment between the red- and blue-shifted outflows. Seven objects show significant misalignment between the outflow axis (either or both of the red- and blue-shifted outflows) and the minor axis of the dust continuum emission around the protostar. For the objects showing wind-driven shell emission, we compare simple parametrized models with the observations to derive physical properties of the observed shells, such as their dynamical ages. This shows evidence of a time variability in the outflows, such as changes in their direction. In some objects, large differences are seen between the properties of the red- and blue-shifted outflows, possibly indicating differences in the properties of the ambient medium with which the outflow interacts. |
| title | Early Planet Formation in Embedded Disks (eDisk). XIX. Structures of molecular outflows |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2512.21454 |