The emergence of massive stars and clusters in complex fiber networks: towards a unified model for star formation

In Webseminar by admin

Wednesday 7 October 2020 11AM
Alvaro Hacar (Institute für Astrophysik Universität Wien, Vienna)

As demonstrated by different galactic surveys, the star-formation process is intimately connected to the formation and evolution of filaments. Using large-scale observations from both single-dish and interferometers such as IRAM and ALMA, we carried out a systematic study of the molecular emission of several filamentary clouds such as Taurus, Perseus, and Orion. The analysis of the internal gas kinematics of these regions indicates a complex gas substructure within both low- and high-mass filaments. Independently of the environment, filaments are revealed as bundles of fibers of different complexity. The local properties of these fibers (internal motions, distribution, and mass) set the initial conditions for the formation of stars within all these clouds. Based on these findings, we propose a unified star-formation scenario where the observed differences between low- and high-mass clouds, and the origin of clusters, emerge naturally from the initial concentration of fibers.