High dust content of a quiescent galaxy at z ∼ 2 revealed by deep ALMA observation
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High dust content of a quiescent galaxy at z ∼ 2 revealed by deep ALMA observation. / Lee, Minju M.; Steidel, Charles C.; Brammer, Gabriel; Förster-Schreiber, Natascha; Renzini, Alvio; Liu, Daizhong; Herrera-Camus, Rodrigo; Naab, Thorsten; Price, Sedona H.; Übler, Hannah; Arriagada-Neira, Sebastián; Magdis, Georgios.
In: Monthly Notices of the Royal Astronomical Society, Vol. 527, No. 4, 2024, p. 9529-9547.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - High dust content of a quiescent galaxy at z ∼ 2 revealed by deep ALMA observation
AU - Lee, Minju M.
AU - Steidel, Charles C.
AU - Brammer, Gabriel
AU - Förster-Schreiber, Natascha
AU - Renzini, Alvio
AU - Liu, Daizhong
AU - Herrera-Camus, Rodrigo
AU - Naab, Thorsten
AU - Price, Sedona H.
AU - Übler, Hannah
AU - Arriagada-Neira, Sebastián
AU - Magdis, Georgios
N1 - Publisher Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2024
Y1 - 2024
N2 - We report the detection of cold dust in an apparently quiescent massive galaxy (log (M∗/M☉) ≈ 11) at z ∼ 2 (G4). The source is identified as a serendipitous 2 mm continuum source in a deep ALMA observation within the field of Q2343-BX610, a z = 2.21 massive star-forming disc galaxy. Available multiband photometry of G4 suggests redshift of z ∼ 2 and a low specific star formation rate (sSFR), log (SFR/M∗)[yr−1] ≈ −10.2, corresponding to ≈1.2 dex below the z = 2 main sequence (MS). G4 appears to be a peculiar dust-rich quiescent galaxy for its stellar mass (log (Mdust/M∗) = −2.71 ± 0.26), with its estimated mass-weighted age (∼1–2 Gyr). We compile z ≳ 1 quiescent galaxies in the literature and discuss their age–∆MS and log (Mdust/M∗)–age relations to investigate passive evolution and dust depletion scale. A long dust depletion time and its morphology suggest morphological quenching along with less efficient feedback that could have acted on G4. The estimated dust yield for G4 further supports this idea, requiring efficient survival of dust and/or grain growth, and rejuvenation (or additional accretion). Follow-up observations probing the stellar light and cold dust peak are necessary to understand the implication of these findings in the broader context of galaxy evolutionary studies and quenching in the early universe.
AB - We report the detection of cold dust in an apparently quiescent massive galaxy (log (M∗/M☉) ≈ 11) at z ∼ 2 (G4). The source is identified as a serendipitous 2 mm continuum source in a deep ALMA observation within the field of Q2343-BX610, a z = 2.21 massive star-forming disc galaxy. Available multiband photometry of G4 suggests redshift of z ∼ 2 and a low specific star formation rate (sSFR), log (SFR/M∗)[yr−1] ≈ −10.2, corresponding to ≈1.2 dex below the z = 2 main sequence (MS). G4 appears to be a peculiar dust-rich quiescent galaxy for its stellar mass (log (Mdust/M∗) = −2.71 ± 0.26), with its estimated mass-weighted age (∼1–2 Gyr). We compile z ≳ 1 quiescent galaxies in the literature and discuss their age–∆MS and log (Mdust/M∗)–age relations to investigate passive evolution and dust depletion scale. A long dust depletion time and its morphology suggest morphological quenching along with less efficient feedback that could have acted on G4. The estimated dust yield for G4 further supports this idea, requiring efficient survival of dust and/or grain growth, and rejuvenation (or additional accretion). Follow-up observations probing the stellar light and cold dust peak are necessary to understand the implication of these findings in the broader context of galaxy evolutionary studies and quenching in the early universe.
KW - galaxies: bulges
KW - galaxies: evolution
KW - galaxies: formation
KW - galaxies: high-redshift
KW - galaxies: ISM
U2 - 10.1093/mnras/stad3718
DO - 10.1093/mnras/stad3718
M3 - Journal article
AN - SCOPUS:85181847042
VL - 527
SP - 9529
EP - 9547
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 389663645