Theory of Feedback in Clusters and Molecular Cloud Turbulence

Author:

Vázquez-Semadeni Enrique

Abstract

AbstractI review recent numerical and analytical work on the feedback from both low- and high-mass cluster stars into their gaseous environment. The main conclusions are that i) outflow driving appears capable of maintaing the turbulence in parsec-sized clumps and retarding their collapse from the free-fall rate, although there exist regions within molecular clouds, and even some examples of whole clouds, which are not actively forming stars, yet are just as turbulent, so that a more universal turbulence-driving mechanism is needed; ii) outflow-driven turbulence exhibits specific spectral features that can be tested observationally; iii) feedback plays an important role in reducing the SFR; iv) nevertheless, numerical simulations suggest feedback cannot completely prevent a net contracting motion of clouds and clumps. Therefore, an appealing source for driving the turbulence everywhere in GMCs is the accretion from the environment, at all scales. In this case, feedback's most important role may be to prevent a fraction of the gas nearest to newly formed stars from actually reaching them, thus reducing the SFE.

Publisher

Cambridge University Press (CUP)

Subject

Astronomy and Astrophysics,Space and Planetary Science

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. The effect of photoionizing feedback on the shaping of hierarchically-forming stellar clusters;Monthly Notices of the Royal Astronomical Society;2020-09-25

2. Global hierarchical collapse in molecular clouds. Towards a comprehensive scenario;Monthly Notices of the Royal Astronomical Society;2019-10-03

3. The jet feedback mechanism (JFM) in stars, galaxies and clusters;New Astronomy Reviews;2016-12

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