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Title: Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations

Abstract

Using a state-of-the-art cosmological simulation of merging proto-galaxies at high redshift from the FIRE project, with explicit treatments of star formation and stellar feedback in the interstellar medium, we investigate the formation of star clusters and examine one of the formation hypotheses of present-day metal-poor globular clusters. Here, we find that frequent mergers in high-redshift proto-galaxies could provide a fertile environment to produce long-lasting bound star clusters. The violent merger event disturbs the gravitational potential and pushes a large gas mass of ≳ 105–6 M collectively to high density, at which point it rapidly turns into stars before stellar feedback can stop star formation. The high dynamic range of the reported simulation is critical in realizing such dense star-forming clouds with a small dynamical time-scale, tff ≲ 3 Myr, shorter than most stellar feedback time-scales. Our simulation then allows us to trace how clusters could become virialized and tightly bound to survive for up to ~420 Myr till the end of the simulation. Finally, because the cluster's tightly bound core was formed in one short burst, and the nearby older stars originally grouped with the cluster tend to be preferentially removed, at the end of the simulation the cluster hasmore » a small age spread.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [6]; ORCiD logo [2];  [7]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology; Stanford Univ., CA (United States). Dept. of Physics; California Inst. of Technology (CalTech), Pasadena, CA (United States). TAPIR, Dept. of Astronomy
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). TAPIR, Dept. of Astronomy
  3. Center for Computational Astrophysics, New York, NY (United States). Flatiron Inst.; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  4. California Inst. of Technology (CalTech), Pasadena, CA (United States). TAPIR, Dept. of Astronomy; Carnegie Observatories, Pasadena, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
  5. Northwestern Univ., Evanston, IL (United States). Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Dept. of Physics and Astronomy
  6. Univ. of California, San Diego, CA (United States). Center for Astrophysics and Space Sciences, Dept. of Physics
  7. Univ. of Toronto, ON (Canada). Canadian Inst. for Theoretical Astrophysics
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); National Aeronautics and Space Administration (NASA); Alfred P. Sloan Foundation; Gordon and Betty Moore Foundation
OSTI Identifier:
1423127
Grant/Contract Number:  
AC02-76SF00515; PF4-150147; NAS8-03060; AST-1411920; AST-1517491; AST-1412836; 1455342; NNX14AH35G; HSTGO-14734; NNX15AB22G; HST-AR-14293.001-A; HST-GO-14268.022-A; PF5-160136
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 474; Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; stars formation; globular clusters general; galaxies formation; galaxies kinematics and dynamics; galaxies star clusters general; cosmology theory

Citation Formats

Kim, Ji-hoon, Ma, Xiangcheng, Grudić, Michael Y., Hopkins, Philip F., Hayward, Christopher C., Wetzel, Andrew, Faucher-Giguère, Claude-André, Kereš, Dušan, Garrison-Kimmel, Shea, and Murray, Norman. Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations. United States: N. p., 2017. Web. doi:10.1093/mnras/stx2994.
Kim, Ji-hoon, Ma, Xiangcheng, Grudić, Michael Y., Hopkins, Philip F., Hayward, Christopher C., Wetzel, Andrew, Faucher-Giguère, Claude-André, Kereš, Dušan, Garrison-Kimmel, Shea, & Murray, Norman. Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations. United States. https://doi.org/10.1093/mnras/stx2994
Kim, Ji-hoon, Ma, Xiangcheng, Grudić, Michael Y., Hopkins, Philip F., Hayward, Christopher C., Wetzel, Andrew, Faucher-Giguère, Claude-André, Kereš, Dušan, Garrison-Kimmel, Shea, and Murray, Norman. Thu . "Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations". United States. https://doi.org/10.1093/mnras/stx2994. https://www.osti.gov/servlets/purl/1423127.
@article{osti_1423127,
title = {Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations},
author = {Kim, Ji-hoon and Ma, Xiangcheng and Grudić, Michael Y. and Hopkins, Philip F. and Hayward, Christopher C. and Wetzel, Andrew and Faucher-Giguère, Claude-André and Kereš, Dušan and Garrison-Kimmel, Shea and Murray, Norman},
abstractNote = {Using a state-of-the-art cosmological simulation of merging proto-galaxies at high redshift from the FIRE project, with explicit treatments of star formation and stellar feedback in the interstellar medium, we investigate the formation of star clusters and examine one of the formation hypotheses of present-day metal-poor globular clusters. Here, we find that frequent mergers in high-redshift proto-galaxies could provide a fertile environment to produce long-lasting bound star clusters. The violent merger event disturbs the gravitational potential and pushes a large gas mass of ≳ 105–6 M⊙ collectively to high density, at which point it rapidly turns into stars before stellar feedback can stop star formation. The high dynamic range of the reported simulation is critical in realizing such dense star-forming clouds with a small dynamical time-scale, tff ≲ 3 Myr, shorter than most stellar feedback time-scales. Our simulation then allows us to trace how clusters could become virialized and tightly bound to survive for up to ~420 Myr till the end of the simulation. Finally, because the cluster's tightly bound core was formed in one short burst, and the nearby older stars originally grouped with the cluster tend to be preferentially removed, at the end of the simulation the cluster has a small age spread.},
doi = {10.1093/mnras/stx2994},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 474,
place = {United States},
year = {Thu Nov 23 00:00:00 EST 2017},
month = {Thu Nov 23 00:00:00 EST 2017}
}

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  • Varri, Anna Lisa; Cai, Maxwell Xu; Concha-Ramírez, Francisca
  • Computational Astrophysics and Cosmology, Vol. 5, Issue 1
  • DOI: 10.1186/s40668-018-0024-6

Globular Clusters in a Cosmological N -body Simulation
journal, July 2018


Cold Filamentary Accretion and the Formation of Metal-poor Globular Clusters and Halo Stars
journal, July 2018

  • Mandelker, Nir; Dokkum, Pieter G. van; Brodie, Jean P.
  • The Astrophysical Journal, Vol. 861, Issue 2
  • DOI: 10.3847/1538-4357/aaca98

Two Thresholds for Globular Cluster Formation and the Common Occurrence of Massive Clusters in the Early Universe
journal, December 2018


High-redshift Galaxy Formation with Self-consistently Modeled Stars and Massive Black Holes: Stellar Feedback and Quasar Growth
journal, December 2019


The Formation of Low-metallicity Globular Clusters in Dwarf Galaxy Mergers
journal, July 2019

  • Lahén, Natalia; Naab, Thorsten; Johansson, Peter H.
  • The Astrophysical Journal, Vol. 879, Issue 2
  • DOI: 10.3847/2041-8213/ab2a13

Simulating galaxies in the reionization era with FIRE-2: morphologies and sizes
text, January 2018

  • Ma, Xiangcheng; Hopkins, Philip F.; Boylan-Kolchin, Michael
  • Oxford University Press
  • DOI: 10.5167/uzh-157195

Globular Clusters in a Cosmological N-body Simulation
text, January 2017


Gas clump formation via thermal instability in high-redshift dwarf galaxy mergers
text, January 2017


Cold Filamentary Accretion and the Formation of Metal Poor Globular Clusters and Halo Stars
text, January 2017


The E-MOSAICS Project: simulating the formation and co-evolution of galaxies and their star cluster populations
text, January 2017


Massive Star cluster formation under the microscope at z=6
text, January 2018


Massive star cluster formation and evolution in tidal dwarf galaxies
text, January 2019


The evolution of the UV luminosity function of globular clusters in the E-MOSAICS simulations
text, January 2019


The SLUGGS Survey: Measuring globular cluster ages using both photometry and spectroscopy
text, January 2019


What determines the maximum stellar surface density of galaxies?
journal, June 2020

  • Ling, Chih-Teng; Hashimoto, Tetsuya; Goto, Tomotsugu
  • Monthly Notices of the Royal Astronomical Society, Vol. 496, Issue 1
  • DOI: 10.1093/mnras/staa1536

Simulating the interstellar medium of galaxies with radiative transfer, non-equilibrium thermochemistry, and dust
journal, October 2020

  • Kannan, Rahul; Marinacci, Federico; Vogelsberger, Mark
  • Monthly Notices of the Royal Astronomical Society, Vol. 499, Issue 4
  • DOI: 10.1093/mnras/staa3249

STARFORGE: the effects of protostellar outflows on the IMF
journal, February 2021

  • Guszejnov, Dávid; Grudić, Michael Y.; Hopkins, Philip F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 502, Issue 3
  • DOI: 10.1093/mnras/stab278

Why do black holes trace bulges (& central surface densities), instead of galaxies as a whole?
journal, November 2021

  • Hopkins, Philip F.; Wellons, Sarah; Anglés-Alcázar, Daniel
  • Monthly Notices of the Royal Astronomical Society, Vol. 510, Issue 1
  • DOI: 10.1093/mnras/stab3458

Effects of initial density profiles on massive star cluster formation in giant molecular clouds
journal, February 2021

  • Chen, Yingtian; Li, Hui; Vogelsberger, Mark
  • Monthly Notices of the Royal Astronomical Society, Vol. 502, Issue 4
  • DOI: 10.1093/mnras/stab491

The maximum stellar surface density due to the failure of stellar feedback
journal, December 2018

  • Grudić, Michael Y.; Hopkins, Philip F.; Quataert, Eliot
  • Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 4
  • DOI: 10.1093/mnras/sty3386

On the nature of variations in the measured star formation efficiency of molecular clouds
journal, June 2019

  • Grudić, Michael Y.; Hopkins, Philip F.; Lee, Eve J.
  • Monthly Notices of the Royal Astronomical Society, Vol. 488, Issue 2
  • DOI: 10.1093/mnras/stz1758

Local photoionization feedback effects on galaxies
journal, September 2019

  • Obreja, Aura; Macciò, Andrea V.; Moster, Benjamin
  • Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 2
  • DOI: 10.1093/mnras/stz2639

The lifecycle of molecular clouds in nearby star-forming disc galaxies
journal, December 2019

  • Chevance, Mélanie; Kruijssen, J. M. Diederik; Hygate, Alexander P. S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 493, Issue 2
  • DOI: 10.1093/mnras/stz3525

Most stars (and planets?) are born in intense radiation fields
journal, April 2020

  • Lee, Eve J.; Hopkins, Philip F.
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 495, Issue 1
  • DOI: 10.1093/mnrasl/slaa050

The universal acceleration scale from stellar feedback
journal, June 2020

  • Grudić, Michael Y.; Boylan-Kolchin, Michael; Faucher-Giguère, Claude-André
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 496, Issue 1
  • DOI: 10.1093/mnrasl/slaa103

The formation and hierarchical assembly of globular cluster populations
text, January 2018


What drives the evolution of gas kinematics in star-forming galaxies?
text, January 2018


Clustered Supernovae Drive Powerful Galactic Winds After Super-Bubble Breakout
text, January 2018


Live Fast, Die Young: GMC lifetimes in the FIRE cosmological simulations of Milky Way-mass galaxies
text, January 2019


On the initial mass-radius relation of stellar clusters
text, January 2019


The effect of photoionising feedback on the shaping of hierarchically-forming stellar clusters
text, January 2020


Effects of Different Cosmic Ray Transport Models on Galaxy Formation
text, January 2020


The mass budget for intermediate-mass black holes in dense star clusters
text, January 2020


Which feedback mechanisms dominate in the high-pressure environment of the Central Molecular Zone?
text, January 2020


STARFORGE: Toward a comprehensive numerical model of star cluster formation and feedback
text, January 2020


Seeds Don't Sink: Even Massive Black Hole "Seeds" Cannot Migrate to Galaxy Centers Efficiently
text, January 2021