Science Highlights
Multiple Misaligned Outflows and Warped Accretion Flows in the Proto-multiple System Per-emb-8 and 55
Multiple systems are common outcome in the star-forming regions. However, the formation process of multiple system remains unclear due to the complex dynamic. To address this, we analyze the ALMA data of 1.3 mm continuum, 12CO, and C18O emission in a young triple system, Per-emb-8, 55A, and 55B. Our findings reveal that the 1.3 mm continuum emission likely traces the Keplerian rotation disk, and shows that Per-emb-8 has misaligned inner and outer disk. Moreover, we discover the multiple bipolar outflows associate with Per-emb-8 and misaligned outflows around Per-emb-55. In the continuum and C18O emission, we identify two arm-like infalling flows associated with the Keplerian disk of Per-emb-8. The presence of the warped disk, multiple misaligned outflows, and asymmetric infalling flows highlight the complex dynamic in proto-multiple system. These features suggest the tidal interaction and/or turbulent environment are likely key mechanisms driving the formation of this triple system.
Shang-Jing Lin et al. (2024), ApJ, 168, 107