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Title: Star Formation of Merging Disk Galaxies with AGN Feedback Effects

Abstract

Using a numerical hydrodynamics code, we perform various idealized galaxy merger simulations to study the star formation (SF) of two merging disk galaxies. Our simulations include gas accretion onto supermassive black holes and active galactic nucleus (AGN) feedback. By comparing AGN simulations with those without AGNs, we attempt to understand when the AGN feedback effect is significant. Using ∼70 simulations, we investigate SF with the AGN effect in mergers with a variety of mass ratios, inclinations, orbits, galaxy structures, and morphologies. Using these merger simulations with AGN feedback, we measure merger-driven SF using the burst efficiency parameter introduced by Cox et al. We confirm previous studies which demonstrated that, in galaxy mergers, AGN suppresses SF more efficiently than in isolated galaxies. However, we also find that the effect of AGNs on SF is larger in major than in minor mergers. In minor merger simulations with different primary bulge-to-total ratios, the effect of bulge fraction on the merger-driven SF decreases due to AGN feedback. We create models of Sa-, Sb-, and Sc-type galaxies and compare their SF properties while undergoing mergers. With the current AGN prescriptions, the difference in merger-driven SF is not as pronounced as in the recent observational studymore » of Kaviraj. We discuss the implications of this discrepancy.« less

Authors:
; ;  [1]
  1. Department of Astronomy and Yonsei University Observatory, Yonsei University, Seoul 03722 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22663222
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 845; 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; BLACK HOLES; COMPARATIVE EVALUATIONS; EFFICIENCY; FEEDBACK; GALAXIES; GALAXY NUCLEI; HYDRODYNAMICS; INCLINATION; INTERACTIONS; MASS; ORBITS; SIMULATION; STAR EVOLUTION; STARS

Citation Formats

Park, Jongwon, Smith, Rory, and Yi, Sukyoung K., E-mail: jw.park@yonsei.ac.kr. Star Formation of Merging Disk Galaxies with AGN Feedback Effects. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA81C6.
Park, Jongwon, Smith, Rory, & Yi, Sukyoung K., E-mail: jw.park@yonsei.ac.kr. Star Formation of Merging Disk Galaxies with AGN Feedback Effects. United States. doi:10.3847/1538-4357/AA81C6.
Park, Jongwon, Smith, Rory, and Yi, Sukyoung K., E-mail: jw.park@yonsei.ac.kr. Sun . "Star Formation of Merging Disk Galaxies with AGN Feedback Effects". United States. doi:10.3847/1538-4357/AA81C6.
@article{osti_22663222,
title = {Star Formation of Merging Disk Galaxies with AGN Feedback Effects},
author = {Park, Jongwon and Smith, Rory and Yi, Sukyoung K., E-mail: jw.park@yonsei.ac.kr},
abstractNote = {Using a numerical hydrodynamics code, we perform various idealized galaxy merger simulations to study the star formation (SF) of two merging disk galaxies. Our simulations include gas accretion onto supermassive black holes and active galactic nucleus (AGN) feedback. By comparing AGN simulations with those without AGNs, we attempt to understand when the AGN feedback effect is significant. Using ∼70 simulations, we investigate SF with the AGN effect in mergers with a variety of mass ratios, inclinations, orbits, galaxy structures, and morphologies. Using these merger simulations with AGN feedback, we measure merger-driven SF using the burst efficiency parameter introduced by Cox et al. We confirm previous studies which demonstrated that, in galaxy mergers, AGN suppresses SF more efficiently than in isolated galaxies. However, we also find that the effect of AGNs on SF is larger in major than in minor mergers. In minor merger simulations with different primary bulge-to-total ratios, the effect of bulge fraction on the merger-driven SF decreases due to AGN feedback. We create models of Sa-, Sb-, and Sc-type galaxies and compare their SF properties while undergoing mergers. With the current AGN prescriptions, the difference in merger-driven SF is not as pronounced as in the recent observational study of Kaviraj. We discuss the implications of this discrepancy.},
doi = {10.3847/1538-4357/AA81C6},
journal = {Astrophysical Journal},
number = 2,
volume = 845,
place = {United States},
year = {Sun Aug 20 00:00:00 EDT 2017},
month = {Sun Aug 20 00:00:00 EDT 2017}
}