Sam Geen
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Sam Geen has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
Adrianne Slyz
University of Oxford, Astrophysics, Keble Road, Oxford OX1 3RH, UK
1 shared publicationJeremy Blaizot
CRAL, Université de Lyon I, CNRS UMR 5574, ENS-Lyon, 9 avenue Charles André, F-69561 Saint-Genis-Laval, France
1 shared publication- Joakim Rosdahl
Universite Claude Bernard Lyon 1, CRAL UMR5574, ENS de Lyon, CNRS, Villeurbanne, F-69622, France
1 shared publication - Julien Devriendt
Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
1 shared publication
Latest Publications
- 10 March 2015
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 448 (4) , 3248-3264
A detailed study of feedback from a massive star
We present numerical simulations of a 15 M⊙ star in a suite of idealized environments in order to quantify the amount of energy transmitted to the interstellar medium (ISM). We include models of stellar winds, UV photoionization and the subsequent supernova based on theoretical models and observations of stellar evolution. The system is simulated in 3D using ramses-rt, an Adaptive Mesh Refinement Radiation Hydrodynamics code. We find that stellar winds have a negligible impact on the system owing to their relatively low luminosity compared to the other processes. The main impact of photoionization is to reduce the density of the medium into which the supernova explodes, reducing the rate of radiative cooling of the subsequent supernova. Finally, we present a grid of models quantifying the energy and momentum of the system that can be used to motivate simulations of feedback in the ISM unable to fully resolve the processes discussed in this work.
- 10 March 2015
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 448 (4) , 3248-3264
A detailed study of feedback from a massive star
We present numerical simulations of a 15 M⊙ star in a suite of idealized environments in order to quantify the amount of energy transmitted to the interstellar medium (ISM). We include models of stellar winds, UV photoionization and the subsequent supernova based on theoretical models and observations of stellar evolution. The system is simulated in 3D using ramses-rt, an Adaptive Mesh Refinement Radiation Hydrodynamics code. We find that stellar winds have a negligible impact on the system owing to their relatively low luminosity compared to the other processes. The main impact of photoionization is to reduce the density of the medium into which the supernova explodes, reducing the rate of radiative cooling of the subsequent supernova. Finally, we present a grid of models quantifying the energy and momentum of the system that can be used to motivate simulations of feedback in the ISM unable to fully resolve the processes discussed in this work.