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An Ancient Massive Quiescent Galaxy Found in a Gas-rich z ∼ 3 Group

Kalita, Boris S. and Daddi, Emanuele and D’Eugenio, Chiara and Valentino, Francesco and Rich, R. Michael and Gómez-Guijarro, Carlos and Coogan, Rosemary T. and Delvecchio, Ivan and Elbaz, David and Neill, James D. and Puglisi, Annagrazia and Strazzullo, Veronica (2021) An Ancient Massive Quiescent Galaxy Found in a Gas-rich z ∼ 3 Group. Astrophysical Journal Letters, 917 (2). Art. No. L17. ISSN 2041-8205. doi:10.3847/2041-8213/ac16dc.

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Deep Atacama Large Millimeter/submillimeter Array and Hubble Space Telescope observations reveal the presence of a quenched massive galaxy within the z = 2.91 galaxy group RO-1001. With a mass-weighted stellar age of 1.6 ± 0.4 Gyr this galaxy is one of the oldest known at z ∼ 3, implying that most of its 10¹¹ M_⊙ of stars were rapidly formed at z > 6–8. This is a unique example of the predominantly passive evolution of a galaxy over at least 3 < z < 6 following its high-redshift quenching and a smoking-gun event pointing to the early imprint of an age–environment relation. At the same time, being in a dense group environment with extensive cold gas reservoirs as betrayed by a giant Lyα halo, the existence of this galaxy demonstrates that gas accretion shutdown is not necessary for quenching and its maintenance.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kalita, Boris S.0000-0001-9215-7053
Daddi, Emanuele0000-0002-3331-9590
D’Eugenio, Chiara0000-0001-7344-3126
Valentino, Francesco0000-0001-6477-4011
Rich, R. Michael0000-0003-0427-8387
Gómez-Guijarro, Carlos0000-0002-4085-9165
Coogan, Rosemary T.0000-0002-4343-0479
Delvecchio, Ivan0000-0001-8706-2252
Elbaz, David0000-0002-7631-647X
Neill, James D.0000-0002-0466-1119
Puglisi, Annagrazia0000-0001-9369-1805
Strazzullo, Veronica0000-0001-7975-2894
Additional Information:© 2021. The American Astronomical Society. Received 2021 June 1; revised 2021 July 13; accepted 2021 July 22; published 2021 August 16. We would like to express our gratitude to Raphael Gobat for his valuable inputs. We also thank Gabriel Brammer for assistance with the use of grizli for the HST data reduction. R.M.R. and J.D.N. acknowledge support from GO15910. V.S. acknowledges the support from the ERC-StG ClustersXCosmo grant agreement 716762. F.V. acknowledges support from the Carlsberg Foundation Research Grant CF18-0388 "Galaxies: Rise and Death" and from the Cosmic Dawn Center of Excellence funded by the Danish National Research Foundation under then grant No. 140. A.P. gratefully acknowledges financial support from STFC through grants ST/T000244/1 and ST/P000541/1. B.S.K. would like to thank William G. Hartley (ETH Zurich, Switzerland), for providing crucial software-related files that were needed for this work. This paper makes use of the following ALMA data: 2019.1.00399. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. Software: SExtractor (Bertin & Arnouts 1996), GALFIT (Peng et al. 2002, 2010), grizli (v0.4.0; Brammer 2018), CASA (McMullin et al. 2007), HYPERZ (Bolzonella et al. 2000).
Group:Space Radiation Laboratory
Funding AgencyGrant Number
European Research Council (ERC)716762
Carlsberg FoundationCF18-0388
Danish National Research Foundation140
Science and Technology Facilities Council (STFC)ST/T000244/1
Science and Technology Facilities Council (STFC)ST/P000541/1
Subject Keywords:High-redshift galaxies; Galaxy evolution; Galaxy groups
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: High-redshift galaxies (734); Galaxy evolution (594); Galaxy groups (597)
Record Number:CaltechAUTHORS:20210914-225354517
Persistent URL:
Official Citation:Boris S. Kalita et al 2021 ApJL 917 L17
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110884
Deposited By: George Porter
Deposited On:15 Sep 2021 16:55
Last Modified:15 Sep 2021 16:55

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