Massive molecular outflows

TL;DR

This study maps massive molecular outflows in 26 high-mass star-forming regions, revealing bipolar morphology, higher collimation, and correlations with low-mass outflows, indicating similar physical processes scaled up in mass.

Contribution

It provides the first detailed mapping of massive outflows at high resolution, showing their morphological similarities to low-mass outflows and establishing key correlations.

Findings

80% bipolar morphology in sources

Outflow-core mass correlation established

Accretion rates up to 10^(-3) Msun/yr

Abstract

We present a mapping study of massive molecular outflows in 26 high-mass star-forming regions at 11'' spatial resolution. Bipolar morpholgy is found in 80% of the sources and the collimation is higher than previously thought. Additionally, we find that well known low-mass correlations continue up to the high-mass regime, and accretion rates are around 10^(-4) Msun/yr rising as high as 10^(-3) Msun/yr. A tight correlation between the outflow and the core mass is established, implying that the accretion rate is a rather linear function of the initial core mass. All the data suggest that massive outflows are qualitatively similar and just quantitatively enhanced compared to their low mass counterparts.