Photoionization feedback in turbulent molecular clouds

Nina S. Sartorio*, Bert Vandenbroucke, Diego Falceta-Goncalves, Kenneth Wood

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
2 Downloads (Pure)


We present a study of the impact of photoionization feedback from young massive stars on the turbulent statistics of star-forming molecular clouds. This feedback is expected to alter the density structure of molecular clouds and affect future star formation. Using the AMUN-Rad code, we first generate a converged isothermal forced turbulent density structure inside a periodic box. We then insert an ionizing source in this box and inject photoionization energy using a two-temperature pseudo-isothermal equation of state. We study the impact of sources at different locations in the box and of different source luminosities. We find that photoionization has a minor impact on the 2D and 3D statistics of turbulence when turbulence continues to be driven in the presence of a photoionizing source. Photoionization is only able to disrupt the cloud if the turbulence is allowed to decay. In the former scenario, the presence of an H ii region inside our model cloud does not lead to a significant impact on observable quantities, independent of the source parameters.

Original languageEnglish
Pages (from-to)1833-1843
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Early online date30 Oct 2020
Publication statusPublished - Jan 2021


  • H ii regions
  • Methods: numerical
  • Radiative transfer
  • Turbulence


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