skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS

Abstract

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.

Authors:
;  [1];  [2]
  1. Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States)
  2. Berkeley Center for Cosmological Physics, Department of Physics, University of California Berkeley, Berkeley, CA 94720 (United States)
Publication Date:
OSTI Identifier:
22663970
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 834; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALIGNMENT; ANGULAR MOMENTUM; BARYONS; COSMOLOGY; DISTRIBUTION; FEEDBACK; GALAXIES; GRAVITATIONAL LENSES; HYDRODYNAMICS; SIMULATION; SPACE; STAR EVOLUTION; STARS

Citation Formats

Tenneti, Ananth, Gnedin, Nickolay Y., and Feng, Yu, E-mail: vat@andrew.cmu.edu. IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS. United States: N. p., 2017. Web. doi:10.3847/1538-4357/834/2/169.
Tenneti, Ananth, Gnedin, Nickolay Y., & Feng, Yu, E-mail: vat@andrew.cmu.edu. IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS. United States. doi:10.3847/1538-4357/834/2/169.
Tenneti, Ananth, Gnedin, Nickolay Y., and Feng, Yu, E-mail: vat@andrew.cmu.edu. Tue . "IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS". United States. doi:10.3847/1538-4357/834/2/169.
@article{osti_22663970,
title = {IMPACT OF BARYONIC PHYSICS ON INTRINSIC ALIGNMENTS},
author = {Tenneti, Ananth and Gnedin, Nickolay Y. and Feng, Yu, E-mail: vat@andrew.cmu.edu},
abstractNote = {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.},
doi = {10.3847/1538-4357/834/2/169},
journal = {Astrophysical Journal},
number = 2,
volume = 834,
place = {United States},
year = {Tue Jan 10 00:00:00 EST 2017},
month = {Tue Jan 10 00:00:00 EST 2017}
}