Radiative, magnetic and numerical feedbacks on small-scale fragmentation

TL;DR

This study uses high-resolution simulations to explore how radiative transfer and magnetic fields jointly influence the collapse and fragmentation of low-mass dense cores, revealing complex interactions beyond simple additive effects.

Contribution

It provides a detailed analysis of the combined effects of radiative feedback and magnetic fields on protostellar collapse, highlighting their strong interplay.

Findings

Radiative transfer and magnetic fields significantly influence core collapse.

Their combined effects are more complex than the sum of individual impacts.

Magnetic braking and accretion shock radiation are key interactions.

Abstract

Radiative feedback and magnetic field are understood to have a strong impact on the protostellar collapse. We present high resolution numerical calculations of the collapse of a 1 solar mass dense core in solid body rotation, including both radiative transfer and magnetic field. Using typical parameters for low-mass cores, we study thoroughly the effect of radiative transfer and magnetic field on the first core formation and fragmentation. We show that including the two aforementioned physical processes does not correspond to the simple picture of adding them separately. The interplay between the two is extremely strong, via the magnetic braking and the radiation from the accretion shock.