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
• Yuko Matsushita
• ,
• Masahiro N. Machida
• ,
• Yuya Sakurai
• ,
• Takashi Hosokawa

470
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1026

1049

DOI
10.1093/mnras/stx893

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.

Web of Science ® 被引用回数 : 21

リンク情報
DOI
https://doi.org/10.1093/mnras/stx893
Web of Science