2017年8月
Massive outflows driven by magnetic effects in star-forming clouds with high mass accretion rates
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
- ,
- ,
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- 巻
- 470
- 号
- 1
- 開始ページ
- 1026
- 終了ページ
- 1049
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/mnras/stx893
- 出版者・発行元
- OXFORD UNIV PRESS
The relation between the mass accretion rate on to the circumstellar disc and the rate of mass ejection by magnetically driven winds is investigated using three-dimensional magnetohydrodynamics simulations. Using a spherical cloud core with a varying ratio of thermal to gravitational energy, which determines the mass accretion rate on to the disc, to define the initial conditions, the outflow propagation for approximately 10(4) yr after protostar formation is then calculated for several cloud cores. The mass ejection rate and accretion rate are comparable only when the magnetic energy of the initial cloud core is comparable to the gravitational energy. Consequently, in strongly magnetized clouds a higher mass accretion rate naturally produces both massive protostars and massive outflows. The simulated outflow mass, momentum, kinetic energy and momentum flux agree well with observations, indicating that massive stars form through the same mechanism as low-mass stars but require a significantly strong magnetic field to launch massive outflows.
- リンク情報
- ID情報
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- DOI : 10.1093/mnras/stx893
- ISSN : 0035-8711
- eISSN : 1365-2966
- ORCIDのPut Code : 48854031
- Web of Science ID : WOS:000406842600063
- BibTex Code : 2017MNRAS.470.1026M