Multiple misaligned outflows and warped accretion flows in the proto-multiple system Per-emb-8 and 55
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| Format: | Preprint |
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2024
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| _version_ | 1866929395657080832 |
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| author | Lin, Shang-Jing Yen, Hsi-Wei Lai, Shih-Ping |
| author_facet | Lin, Shang-Jing Yen, Hsi-Wei Lai, Shih-Ping |
| contents | To investigate the formation process of multiple systems, we have analyzed the ALMA archival data of the 1.3 mm continuum, $^{12}$CO (2-1) and C$^{18}$O (2-1) emission in a proto-multiple system consisting of a Class 0 protostar Per-emb-8 and a Class I protobinary Per-emb-55 $A$ and $B$. The 1.3 mm continuum emission is likely to primarily trace their protostellar disks, and the Keplerian disk rotation is observed in Per-emb-8 and Per-emb-55 $A$ in the emission lines. In Per-emb-8, we identify two arm-like structures with a length of $\sim$ 1000 au connecting the eastern and western of its disk in the continuum and C$^{18}$O emission. Our analysis suggests that these arm-like structures are most likely infalling flows. In the $^{12}$CO emission, we discover a second bipolar outflow associated with Per-emb-8. The two bipolar outflows in Per-emb-8 are possibly launched along the normal axes of the misaligned inner and outer parts of its warped protostellar disk. In Per-emb-55, we find that the red- and blueshifted lobes of its bipolar outflow are misaligned by 90$^\circ$. The presence of the warped disk, multiple misaligned outflows, and asymmetric infalling flows suggest complex dynamics in proto-multiple systems, and these could be related to the tidal interactions between the companions and/or the turbulent environments forming this proto-multiple system. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_15854 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiple misaligned outflows and warped accretion flows in the proto-multiple system Per-emb-8 and 55 Lin, Shang-Jing Yen, Hsi-Wei Lai, Shih-Ping Solar and Stellar Astrophysics Astrophysics of Galaxies To investigate the formation process of multiple systems, we have analyzed the ALMA archival data of the 1.3 mm continuum, $^{12}$CO (2-1) and C$^{18}$O (2-1) emission in a proto-multiple system consisting of a Class 0 protostar Per-emb-8 and a Class I protobinary Per-emb-55 $A$ and $B$. The 1.3 mm continuum emission is likely to primarily trace their protostellar disks, and the Keplerian disk rotation is observed in Per-emb-8 and Per-emb-55 $A$ in the emission lines. In Per-emb-8, we identify two arm-like structures with a length of $\sim$ 1000 au connecting the eastern and western of its disk in the continuum and C$^{18}$O emission. Our analysis suggests that these arm-like structures are most likely infalling flows. In the $^{12}$CO emission, we discover a second bipolar outflow associated with Per-emb-8. The two bipolar outflows in Per-emb-8 are possibly launched along the normal axes of the misaligned inner and outer parts of its warped protostellar disk. In Per-emb-55, we find that the red- and blueshifted lobes of its bipolar outflow are misaligned by 90$^\circ$. The presence of the warped disk, multiple misaligned outflows, and asymmetric infalling flows suggest complex dynamics in proto-multiple systems, and these could be related to the tidal interactions between the companions and/or the turbulent environments forming this proto-multiple system. |
| title | Multiple misaligned outflows and warped accretion flows in the proto-multiple system Per-emb-8 and 55 |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2406.15854 |