Hot stars, the influence of their radiation on the universum


Project leader


Funding source

Swedish Research Council - Vetenskapsrådet (VR)


Project Details

Start date: 01/01/2007
End date: 31/12/2009
Funding: 1575000 SEK


Description

This project aims at developing and using state-of-the-art numerical tools to study the radiative feedback effects from hot, massive stars. Using a combination of three-dimensional radiative transfer of ionizing radiation, hydrodynamics, and gravity, we will address the problems of the ionizing radiation from hot stars in the early universe ionizing the intergalactic medium (reionization), preparing the theoretical tools and context for the upcoming measurements of the redshifted 21cm line with the LOFAR telescope. We will also study the effects of the ionizing radiation in the vicinity of the stars, by addressing the growth and structure of HII regions in turbulent molecular clouds, and how this feedback provides the energy for maintaining the turbelent motions in the star formation region, and sets up the stellar environment in which the star will explode as a supernova. Thirdly, we will study the dynamics and excitation of smaller, dense and photo-evaporating molecular clouds, common features in star formation regions. This will allow for the first time a numerical study of the internal structure of these clouds, and provide a valuable tool for the interpretation of observations of them.

Last updated on 2017-24-03 at 12:19