Massive Star Birth from Cloud Collisions
Title: Massive Star Birth from Cloud Collisions
DNr: SNIC 2022/5-394
Project Type: SNIC Medium Compute
Principal Investigator: Jonathan Tan <>
Affiliation: Chalmers tekniska högskola
Duration: 2022-08-30 – 2023-09-01
Classification: 10305 10499


Massive stars play an important role in the universe as their capability of strong radiation feedback, chemical enrichment, and powerful explosion in their life end. However, we have little understanding to their formation mechanism because massive stars are very rare and only live for a short time. Therefore, it is important to investigate the environment where massive stars were born. The collisions between giant molecular clouds have been proposed as an effective way to trigger the formation of star clusters, and massive stars form in the clusters at the same time. To precisely trace the place where massive stars form and also find the evidence of cloud collision, chemistry provide us a powerful approach as the chemical species abundance can show the history they inherit from millions of years ago. In this project, we will follow the evolution of chemical species in the cloud collision simulations to reveal their history and to know whether the observed massive prestellar cores came from cloud collisions. We will simulate the cloud collisions starting from different initial chemical conditions to know the influence of the chemical parameters. We will also investigate how the fluid motion influence the chemical evolution by changing some physical parameters like magnetic field strength and colliding speed.