IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS
- Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States)
- Berkeley Center for Cosmological Physics, Department of Physics, University of California Berkeley, Berkeley, CA 94720 (United States)
We explore the effects of specific assumptions in the subgrid models of star formation and stellar and active galactic nucleus feedback on intrinsic alignments of galaxies in cosmological simulations of the “MassiveBlack-II” family. Using smaller-volume simulations, we explore the parameter space of the subgrid star formation and feedback model and find remarkable robustness of the observable statistical measures to the details of subgrid physics. The one observational probe most sensitive to modeling details is the distribution of misalignment angles. We hypothesize that the amount of angular momentum carried away by the galactic wind is the primary physical quantity that controls the orientation of the stellar distribution. Our results are also consistent with a similar study by the EAGLE simulation team.
- OSTI ID:
- 22663970
- Journal Information:
- Astrophysical Journal, Vol. 834, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
The impact of AGN feedback on galaxy intrinsic alignments in the Horizon simulations
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journal | January 2020 |
| The impact of AGN feedback on galaxy intrinsic alignments in the Horizon simulations | text | January 2019 |
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