Magneto-Gravitational Regulated Streamer Accretion onto a Class 0 Protostellar System
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| author | Huang, Bo Girart, Josep M. Stephens, Ian W. Megeath, Tom Gouellec, Valentin J. M. Le Murillo, Nadia M. Cortés, Paulo Fernández-López, Manuel Li, Zhi-Yun Looney, Leslie W. López-Vázquez, J. A. Pineda, Jaime E. Sánchez-Monge, Álvaro Sanhueza, Patricio Sadavoy, Sarah Zhang, Qizhou Hull, Charles L. H. Karnath, Nicole Liang, Enwei Myers, Philip C. |
| author_facet | Huang, Bo Girart, Josep M. Stephens, Ian W. Megeath, Tom Gouellec, Valentin J. M. Le Murillo, Nadia M. Cortés, Paulo Fernández-López, Manuel Li, Zhi-Yun Looney, Leslie W. López-Vázquez, J. A. Pineda, Jaime E. Sánchez-Monge, Álvaro Sanhueza, Patricio Sadavoy, Sarah Zhang, Qizhou Hull, Charles L. H. Karnath, Nicole Liang, Enwei Myers, Philip C. |
| contents | How do magnetic fields shape the way young stars gather gas from their birth clouds? Using high-resolution Atacama Large Millimeter/submillimeter Array observations of a young triple protostellar system HOPS-182, we identify an elongated stream of gas, or accretion streamer, that extends over several thousand astronomical units (1 astronomical unit is the Earth-Sun distance) and carries a substantial flow of material toward the system. The gas speeds along this filament increase toward the star in a way consistent with gravitational free-fall, while the streamer's shape closely follows the magnetic field threading the region. By comparing the strengths of gravity and magnetic tension and measuring how the gas rotates compared with the local magnetic field, we show that the field is strong enough to help confine and guide the infalling gas and efficiently remove angular momentum. These results suggest that a substantial fraction of the material falling onto young protostellar systems can be funneled through elongated, magnetically structured accretion streamers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_01707 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Magneto-Gravitational Regulated Streamer Accretion onto a Class 0 Protostellar System Huang, Bo Girart, Josep M. Stephens, Ian W. Megeath, Tom Gouellec, Valentin J. M. Le Murillo, Nadia M. Cortés, Paulo Fernández-López, Manuel Li, Zhi-Yun Looney, Leslie W. López-Vázquez, J. A. Pineda, Jaime E. Sánchez-Monge, Álvaro Sanhueza, Patricio Sadavoy, Sarah Zhang, Qizhou Hull, Charles L. H. Karnath, Nicole Liang, Enwei Myers, Philip C. Astrophysics of Galaxies How do magnetic fields shape the way young stars gather gas from their birth clouds? Using high-resolution Atacama Large Millimeter/submillimeter Array observations of a young triple protostellar system HOPS-182, we identify an elongated stream of gas, or accretion streamer, that extends over several thousand astronomical units (1 astronomical unit is the Earth-Sun distance) and carries a substantial flow of material toward the system. The gas speeds along this filament increase toward the star in a way consistent with gravitational free-fall, while the streamer's shape closely follows the magnetic field threading the region. By comparing the strengths of gravity and magnetic tension and measuring how the gas rotates compared with the local magnetic field, we show that the field is strong enough to help confine and guide the infalling gas and efficiently remove angular momentum. These results suggest that a substantial fraction of the material falling onto young protostellar systems can be funneled through elongated, magnetically structured accretion streamers. |
| title | Magneto-Gravitational Regulated Streamer Accretion onto a Class 0 Protostellar System |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2606.01707 |