The first quiescent galaxies in TNG300

Abigail I. Hartley; Erica J. Nelson; Katherine A. Suess; Alex M. Garcia; Minjung Park; Lars Hernquist; Rachel Bezanson; Rebecca Nevin; Annalisa Pillepich; Aimee L. Schechter; Bryan A. Terrazas; Paul Torrey; Sarah Wellons; Katherine E. Whitaker; Christina C. Williams

doi:10.1093/mnras/stad1162

The first quiescent galaxies in TNG300

Abigail I. Hartley, Erica J. Nelson, Katherine A. Suess, Alex M. Garcia, Minjung Park, Lars Hernquist, Rachel Bezanson, Rebecca Nevin, Annalisa Pillepich, Aimee L. Schechter, Bryan A. Terrazas, Paul Torrey, Sarah Wellons, Katherine E. Whitaker, Christina C. Williams

Steward Observatory

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We identify the first quiescent galaxies in TNG300, the largest volume of the IllustrisTNG cosmological simulation suite, and explore their quenching processes and time evolution to z = 0. We find that the first quiescent galaxies with stellar masses M_∗ > 3 × 10¹⁰ M_☉ and specific star formation rates sSFR < 10⁻¹¹ yr⁻¹ emerge at z ∼ 4.2 in TNG300. Suppression of star formation in these galaxies begins with a thermal mode of active galactic nucleus feedback at z ∼ 6, and a kinetic feedback mode acts in each galaxy by z ∼ 4.7 to complete the quenching process, which occurs on a time-scale of ∼0.35 Gyr. Surprisingly, we find that the majority of these galaxies are not the main progenitors of their z = 0 descendants; instead, four of the five galaxies fall into more massive galaxies in subsequent mergers at a range of redshifts 2.5 < z < 0.2. By z = 0, these descendants are the centres of galaxy clusters with average stellar masses of 8 × 10¹¹ M_☉. We make predictions for the first quenched galaxies to be located by the JWST.

Original language	English (US)
Pages (from-to)	3138-3144
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	522
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stad1162
State	Published - Jun 1 2023

Keywords

evolution- galaxies
galaxies
high-redshift-galaxies
star formation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stad1162

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Hartley, A. I., Nelson, E. J., Suess, K. A., Garcia, A. M., Park, M., Hernquist, L., Bezanson, R., Nevin, R., Pillepich, A., Schechter, A. L., Terrazas, B. A., Torrey, P., Wellons, S., Whitaker, K. E., & Williams, C. C. (2023). The first quiescent galaxies in TNG300. Monthly Notices of the Royal Astronomical Society, 522(2), 3138-3144. https://doi.org/10.1093/mnras/stad1162

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abstract = "We identify the first quiescent galaxies in TNG300, the largest volume of the IllustrisTNG cosmological simulation suite, and explore their quenching processes and time evolution to z = 0. We find that the first quiescent galaxies with stellar masses M∗ > 3 × 1010 M☉ and specific star formation rates sSFR < 10−11 yr−1 emerge at z ∼ 4.2 in TNG300. Suppression of star formation in these galaxies begins with a thermal mode of active galactic nucleus feedback at z ∼ 6, and a kinetic feedback mode acts in each galaxy by z ∼ 4.7 to complete the quenching process, which occurs on a time-scale of ∼0.35 Gyr. Surprisingly, we find that the majority of these galaxies are not the main progenitors of their z = 0 descendants; instead, four of the five galaxies fall into more massive galaxies in subsequent mergers at a range of redshifts 2.5 < z < 0.2. By z = 0, these descendants are the centres of galaxy clusters with average stellar masses of 8 × 1011 M☉. We make predictions for the first quenched galaxies to be located by the JWST.",

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author = "Hartley, {Abigail I.} and Nelson, {Erica J.} and Suess, {Katherine A.} and Garcia, {Alex M.} and Minjung Park and Lars Hernquist and Rachel Bezanson and Rebecca Nevin and Annalisa Pillepich and Schechter, {Aimee L.} and Terrazas, {Bryan A.} and Paul Torrey and Sarah Wellons and Whitaker, {Katherine E.} and Williams, {Christina C.}",

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doi = "10.1093/mnras/stad1162",

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AU - Hartley, Abigail I.

AU - Nelson, Erica J.

AU - Suess, Katherine A.

AU - Garcia, Alex M.

AU - Park, Minjung

AU - Hernquist, Lars

AU - Bezanson, Rachel

AU - Nevin, Rebecca

AU - Pillepich, Annalisa

AU - Schechter, Aimee L.

AU - Terrazas, Bryan A.

AU - Torrey, Paul

AU - Wellons, Sarah

AU - Whitaker, Katherine E.

AU - Williams, Christina C.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - We identify the first quiescent galaxies in TNG300, the largest volume of the IllustrisTNG cosmological simulation suite, and explore their quenching processes and time evolution to z = 0. We find that the first quiescent galaxies with stellar masses M∗ > 3 × 1010 M☉ and specific star formation rates sSFR < 10−11 yr−1 emerge at z ∼ 4.2 in TNG300. Suppression of star formation in these galaxies begins with a thermal mode of active galactic nucleus feedback at z ∼ 6, and a kinetic feedback mode acts in each galaxy by z ∼ 4.7 to complete the quenching process, which occurs on a time-scale of ∼0.35 Gyr. Surprisingly, we find that the majority of these galaxies are not the main progenitors of their z = 0 descendants; instead, four of the five galaxies fall into more massive galaxies in subsequent mergers at a range of redshifts 2.5 < z < 0.2. By z = 0, these descendants are the centres of galaxy clusters with average stellar masses of 8 × 1011 M☉. We make predictions for the first quenched galaxies to be located by the JWST.

AB - We identify the first quiescent galaxies in TNG300, the largest volume of the IllustrisTNG cosmological simulation suite, and explore their quenching processes and time evolution to z = 0. We find that the first quiescent galaxies with stellar masses M∗ > 3 × 1010 M☉ and specific star formation rates sSFR < 10−11 yr−1 emerge at z ∼ 4.2 in TNG300. Suppression of star formation in these galaxies begins with a thermal mode of active galactic nucleus feedback at z ∼ 6, and a kinetic feedback mode acts in each galaxy by z ∼ 4.7 to complete the quenching process, which occurs on a time-scale of ∼0.35 Gyr. Surprisingly, we find that the majority of these galaxies are not the main progenitors of their z = 0 descendants; instead, four of the five galaxies fall into more massive galaxies in subsequent mergers at a range of redshifts 2.5 < z < 0.2. By z = 0, these descendants are the centres of galaxy clusters with average stellar masses of 8 × 1011 M☉. We make predictions for the first quenched galaxies to be located by the JWST.

KW - evolution- galaxies

KW - galaxies

KW - high-redshift-galaxies

KW - star formation

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The first quiescent galaxies in TNG300

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