دورية أكاديمية
Digging into the Interior of Hot Cores with ALMA: Spiral Accretion into the High-mass Protostellar Core G336.01–0.82
| العنوان: | Digging into the Interior of Hot Cores with ALMA: Spiral Accretion into the High-mass Protostellar Core G336.01–0.82 |
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| المؤلفون: | Fernando A. Olguin, Patricio Sanhueza, Huei-Ru Vivien Chen, Xing Lu, Yoko Oya, Qizhou Zhang, Adam Ginsburg, Kotomi Taniguchi, Shanghuo Li, Kaho Morii, Takeshi Sakai, Fumitaka Nakamura |
| المصدر: | The Astrophysical Journal Letters, Vol 959, Iss 2, p L31 (2023) |
| بيانات النشر: | IOP Publishing, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Astrophysics |
| مصطلحات موضوعية: | Star formation, Star forming regions, Massive stars, Astrophysics, QB460-466 |
| الوصف: | We observed the high-mass star-forming core G336.01–0.82 at 1.3 mm and 0.″05 (∼150 au) angular resolution with the Atacama Large Millimeter/submillimeter Array (ALMA) as part of the Digging into the Interior of Hot Cores with ALMA survey. These high-resolution observations reveal two spiral streamers feeding a circumstellar disk at opposite sides in great detail. Molecular line emission from CH _3 OH shows velocity gradients along the streamers consistent with infall. Similarly, a flattened envelope model with rotation and infall implies a mass larger than 10 M _☉ for the central source and a centrifugal barrier of 300 au. The location of the centrifugal barrier is consistent with local peaks in the continuum emission. We argue that gas brought by the spiral streamers is accumulating at the centrifugal barrier, which can result in future accretion burst events. A total high infall rate of ∼4 × 10 ^−4 M _☉ yr ^−1 is derived by matching models to the observed velocity gradient along the streamers. Their contribution accounts for 20%–50% the global infall rate of the core, indicating streamers play an important role in the formation of high-mass stars. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2041-8213 2041-8205 |
| العلاقة: | https://doaj.org/toc/2041-8205Test |
| DOI: | 10.3847/2041-8213/ad1100 |
| الوصول الحر: | https://doaj.org/article/be79ebd5adb7421a97790396196e370eTest |
| رقم الانضمام: | edsdoj.be79ebd5adb7421a97790396196e370e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20418213 20418205 |
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| DOI: | 10.3847/2041-8213/ad1100 |