Report
Direct evidence for magnetohydrodynamic disk winds driving rotating outflows in protostar HOPS 358
| Τίτλος: | Direct evidence for magnetohydrodynamic disk winds driving rotating outflows in protostar HOPS 358 |
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| Συγγραφείς: | Kim, Chul-Hwan, Lee, Jeong-Eun, Johnstone, Doug, Herczeg, Gregory J., Lee, Chin-Fei, Francis, Logan, Sheehan, Patrick D. |
| Έτος έκδοσης: | 2026 |
| Θεματικοί όροι: | Solar and Stellar Astrophysics, Astrophysics of Galaxies |
| Περιγραφή: | Angular momentum removal is a fundamental requirement for star and planet formation, yet the mechanisms driving this process remain debated. Magnetohydrodynamic disk winds, launched along magnetic field lines from extended disk regions, offer a promising solution, particularly in regions where magnetorotational turbulence is weak. Here we present high-resolution Atacama Large Millimeter/submillimeter Array observations of the Class 0 protostar HOPS 358, revealing a rotating, nested outflow structure traced by H2CO, SO, and CH3OH emission. The outflow preserves the disk's rotational sense and is aligned with the disk axis, providing direct observational evidence for a magnetically launched disk wind. From the measured kinematics, we derive a dimensionless magnetic lever arm of approximately 2.3 and constrain the wind-launching region to radii of 10-18 astronomical units within the planet-forming zone. These results demonstrate that magnetohydrodynamic disk winds operate during the deeply embedded phase, efficiently extracting angular momentum while shaping disk evolution and establishing initial conditions for planet formation. 5 main figures, 4 supplementary figures, and 1 supplementary table, accepted for publication in Nature Communications (in press) |
| Τύπος εγγράφου: | Working Paper |
| DOI: | 10.48550/arXiv.2603.26120 |
| Σύνδεσμος πρόσβασης: | http://arxiv.org/abs/2603.26120 |
| Αριθμός Καταχώρησης: | edsarx.2603.26120 |
| Βάση Δεδομένων: | arXiv |
| DOI: | 10.48550/arXiv.2603.26120 |
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