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The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments

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The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments. / Sobral, David; van der Wel, Arjen; Bezanson, Rachel et al.
In: The Astrophysical Journal, Vol. 926, No. 2, 117, 17.02.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Sobral, D, van der Wel, A, Bezanson, R, Bell, E, Muzzin, A, D’Eugenio, F, Darvish, B, Gallazzi, A, Wu, P-F, Maseda, M, Matthee, J, Paulino-Afonso, A, Straatman, C & van Dokkum, PG 2022, 'The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments', The Astrophysical Journal, vol. 926, no. 2, 117. https://doi.org/10.3847/1538-4357/ac4419

APA

Sobral, D., van der Wel, A., Bezanson, R., Bell, E., Muzzin, A., D’Eugenio, F., Darvish, B., Gallazzi, A., Wu, P.-F., Maseda, M., Matthee, J., Paulino-Afonso, A., Straatman, C., & van Dokkum, P. G. (2022). The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments. The Astrophysical Journal, 926(2), Article 117. https://doi.org/10.3847/1538-4357/ac4419

Vancouver

Sobral D, van der Wel A, Bezanson R, Bell E, Muzzin A, D’Eugenio F et al. The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments. The Astrophysical Journal. 2022 Feb 17;926(2):117. doi: 10.3847/1538-4357/ac4419

Author

Sobral, David ; van der Wel, Arjen ; Bezanson, Rachel et al. / The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments. In: The Astrophysical Journal. 2022 ; Vol. 926, No. 2.

Bibtex

@article{2fa7c05e73b44974a3ae30f47e95f422,
title = "The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments",
abstract = "Abstract: Galaxy evolution is driven by a variety of physical processes that are predicted to proceed at different rates for different dark matter haloes and environments across cosmic times. A record of this evolution is preserved in galaxy stellar populations, which we can access using absorption-line spectroscopy. Here we explore the large LEGA-C survey (DR3) to investigate the role of the environment and stellar mass on stellar populations at z ∼ 0.6–1 in the COSMOS field. Leveraging the statistical power and depth of LEGA-C, we reveal significant gradients in D n 4000 and Hδ equivalent widths (EWs) distributions over the stellar mass versus environment 2D spaces for the massive galaxy population (M > 1010 M ⊙) at z ∼ 0.6–1.0. D n 4000 and Hδ EWs primarily depend on stellar mass, but they also depend on environment at fixed stellar mass. By splitting the sample into centrals and satellites, and in terms of star-forming galaxies and quiescent galaxies, we reveal that the significant environmental trends of D n 4000 and Hδ EW, when controlling for stellar mass, are driven by quiescent galaxies. Regardless of being centrals or satellites, star-forming galaxies reveal D n 4000 and Hδ EWs, which depend strongly on their stellar mass and are completely independent of the environment at 0.6 <z <1.0. The environmental trends seen for satellite galaxies are fully driven by the trends that hold only for quiescent galaxies, combined with the strong environmental dependency of the quiescent fraction at fixed stellar mass. Our results are consistent with recent predictions from simulations that point toward massive galaxies forming first in overdensities or the most compact dark matter haloes.",
keywords = "310, Galaxies and Cosmology",
author = "David Sobral and {van der Wel}, Arjen and Rachel Bezanson and Eric Bell and Adam Muzzin and Francesco D{\textquoteright}Eugenio and Behnam Darvish and Anna Gallazzi and Po-Feng Wu and Michael Maseda and Jorryt Matthee and Ana Paulino-Afonso and Caroline Straatman and {van Dokkum}, {Pieter G.}",
year = "2022",
month = feb,
day = "17",
doi = "10.3847/1538-4357/ac4419",
language = "English",
volume = "926",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - The LEGA-C of Nature and Nurture in Stellar Populations at z ∼ 0.6–1.0: D n 4000 and H δ Reveal Different Assembly Histories for Quiescent Galaxies in Different Environments

AU - Sobral, David

AU - van der Wel, Arjen

AU - Bezanson, Rachel

AU - Bell, Eric

AU - Muzzin, Adam

AU - D’Eugenio, Francesco

AU - Darvish, Behnam

AU - Gallazzi, Anna

AU - Wu, Po-Feng

AU - Maseda, Michael

AU - Matthee, Jorryt

AU - Paulino-Afonso, Ana

AU - Straatman, Caroline

AU - van Dokkum, Pieter G.

PY - 2022/2/17

Y1 - 2022/2/17

N2 - Abstract: Galaxy evolution is driven by a variety of physical processes that are predicted to proceed at different rates for different dark matter haloes and environments across cosmic times. A record of this evolution is preserved in galaxy stellar populations, which we can access using absorption-line spectroscopy. Here we explore the large LEGA-C survey (DR3) to investigate the role of the environment and stellar mass on stellar populations at z ∼ 0.6–1 in the COSMOS field. Leveraging the statistical power and depth of LEGA-C, we reveal significant gradients in D n 4000 and Hδ equivalent widths (EWs) distributions over the stellar mass versus environment 2D spaces for the massive galaxy population (M > 1010 M ⊙) at z ∼ 0.6–1.0. D n 4000 and Hδ EWs primarily depend on stellar mass, but they also depend on environment at fixed stellar mass. By splitting the sample into centrals and satellites, and in terms of star-forming galaxies and quiescent galaxies, we reveal that the significant environmental trends of D n 4000 and Hδ EW, when controlling for stellar mass, are driven by quiescent galaxies. Regardless of being centrals or satellites, star-forming galaxies reveal D n 4000 and Hδ EWs, which depend strongly on their stellar mass and are completely independent of the environment at 0.6 <z <1.0. The environmental trends seen for satellite galaxies are fully driven by the trends that hold only for quiescent galaxies, combined with the strong environmental dependency of the quiescent fraction at fixed stellar mass. Our results are consistent with recent predictions from simulations that point toward massive galaxies forming first in overdensities or the most compact dark matter haloes.

AB - Abstract: Galaxy evolution is driven by a variety of physical processes that are predicted to proceed at different rates for different dark matter haloes and environments across cosmic times. A record of this evolution is preserved in galaxy stellar populations, which we can access using absorption-line spectroscopy. Here we explore the large LEGA-C survey (DR3) to investigate the role of the environment and stellar mass on stellar populations at z ∼ 0.6–1 in the COSMOS field. Leveraging the statistical power and depth of LEGA-C, we reveal significant gradients in D n 4000 and Hδ equivalent widths (EWs) distributions over the stellar mass versus environment 2D spaces for the massive galaxy population (M > 1010 M ⊙) at z ∼ 0.6–1.0. D n 4000 and Hδ EWs primarily depend on stellar mass, but they also depend on environment at fixed stellar mass. By splitting the sample into centrals and satellites, and in terms of star-forming galaxies and quiescent galaxies, we reveal that the significant environmental trends of D n 4000 and Hδ EW, when controlling for stellar mass, are driven by quiescent galaxies. Regardless of being centrals or satellites, star-forming galaxies reveal D n 4000 and Hδ EWs, which depend strongly on their stellar mass and are completely independent of the environment at 0.6 <z <1.0. The environmental trends seen for satellite galaxies are fully driven by the trends that hold only for quiescent galaxies, combined with the strong environmental dependency of the quiescent fraction at fixed stellar mass. Our results are consistent with recent predictions from simulations that point toward massive galaxies forming first in overdensities or the most compact dark matter haloes.

KW - 310

KW - Galaxies and Cosmology

U2 - 10.3847/1538-4357/ac4419

DO - 10.3847/1538-4357/ac4419

M3 - Journal article

VL - 926

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 117

ER -