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- W2891765767 abstract "Abstract Most simulations of galaxies and massive giant molecular clouds (GMCs) cannot explicitly resolve the formation (or predict the main-sequence masses) of individual stars. So they must use some prescription for the amount of feedback from an assumed population of massive stars (e.g. sampling the initial mass function, IMF). We perform a methods study of simulations of a star-forming GMC with stellar feedback from UV radiation, varying only the prescription for determining the luminosity of each stellar mass element formed (according to different IMF sampling schemes). We show that different prescriptions can lead to widely varying (factor of ∼3) star formation efficiencies (on GMC scales) even though the average mass-to-light ratios agree. Discreteness of sources is important: radiative feedback from fewer, more-luminous sources has a greater effect for a given total luminosity. These differences can dominate over other, more widely recognized differences between similar literature GMC-scale studies (e.g. numerical methods, cloud initial conditions, presence of magnetic fields). Moreover the differences in these methods are not purely numerical: some make different implicit assumptions about the nature of massive star formation, and this remains deeply uncertain in star formation theory." @default.
- W2891765767 created "2018-09-27" @default.
- W2891765767 creator A5030482289 @default.
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- W2891765767 date "2019-07-25" @default.
- W2891765767 modified "2023-10-17" @default.
- W2891765767 title "The elephant in the room: the importance of the details of massive star formation in molecular clouds" @default.
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- W2891765767 doi "https://doi.org/10.1093/mnras/stz1820" @default.
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