DESI Massive Poststarburst Galaxies at z ~ 1.2 Have Compact Structures and Dense Cores

Zhang, Yunchong; Setton, David J.; Price, Sedona H.; Bezanson, Rachel; Khullar, Gourav; Newman, Jeffrey A.; Aguilar, Jessica Nicole; Ahlen, Steven; Andrews, Brett H.; Brooks, David; Claybaugh, Todd; de la Macorra, Axel; Dey, Biprateep; Doel, Peter; Gaztañaga, Enrique; Gontcho A Gontcho, Satya; Greene, Jenny E.; Juneau, Stephanie; Kehoe, Robert; Kisner, Theodore; Kriek, Mariska; Leja, Joel; Manera, Marc; Meisner, Aaron; Miquel, Ramon; Moustakas, John; Prada, Francisco; Rossi, Graziano; Sanchez, Eusebio; Schubnell, Michael; Siudek, Małgorzata; Spilker, Justin; Sprayberry, David; Suess, Katherine A.; Tarlé, Gregory; Zou, Hu

doi:10.3847/1538-4357/ad7c45

Title: DESI Massive Poststarburst Galaxies at z ~ 1.2 Have Compact Structures and Dense Cores

Journal Article · 11 November 2024 · The Astrophysical Journal

DOI: https://doi.org/10.3847/1538-4357/ad7c45 · OSTI ID:2476832

^[1];

;

; Aguilar, Jessica Nicole;

;

; Claybaugh, Todd;

;

; Doel, Peter;

;

University of Pittsburgh

Poststarburst galaxies (PSBs) are young quiescent galaxies that have recently experienced a rapid decrease in star formation, allowing us to probe the fast-quenching period of galaxy evolution. In this work, we obtained Hubble Space Telescope (HST)/WFC3 F110W imaging to measure the sizes of 171 massive (log(M_$$\ast$$/M_⊙) ~ 11) spectroscopically identified PSBs at 1 < z 1.3 selected from the DESI Survey Validation luminous red galaxy sample. This statistical sample constitutes an order of magnitude increase from the ~20 PSBs with space-based imaging and deep spectroscopy. We perform structural fitting of the target galaxies with pysersic and compare them to quiescent and star-forming galaxies in the 3D-HST survey. We find that these PSBs are more compact than the general population of quiescent galaxies, lying systematically ~0.1 dex below the established size–mass relation. However, their central surface mass densities are similar to those of their quiescent counterparts (log(Σ_1kpc/(M_⊙kpc^-2))~10.1). These findings are easily reconciled by later ex situ growth via minor mergers or a slight progenitor bias. These PSBs are round in projection (b/a_median ~ 0.8), suggesting that they are primarily spheroids, not disks, in 3D. We find no correlation between the time since quenching and light-weighted PSB sizes or central densities. This disfavors apparent structural growth due to the fading of centralized starbursts in this galaxy population. Instead, we posit that the fast quenching of massive galaxies at this epoch occurs preferentially in galaxies with preexisting compact structures.

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Research Organization:: University of Pittsburgh, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: DESI Collaboration

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2476832

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 976; ISSN 0004-637X

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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An Older, More Quiescent Universe from Panchromatic SED Fitting of the 3D- HST Survey Leja, Joel; Johnson, Benjamin D.; Conroy, Charlie The Astrophysical Journal, Vol. 877, Issue 2 https://doi.org/10.3847/1538-4357/ab1d5a	journal	June 2019
COSMOS-DASH: The Evolution of the Galaxy Size–Mass Relation since z ∼ 3 from New Wide-field WFC3 Imaging Combined with CANDELS/3D- HST Mowla, Lamiya A.; Dokkum, Pieter van; Brammer, Gabriel B. The Astrophysical Journal, Vol. 880, Issue 1 https://doi.org/10.3847/1538-4357/ab290a	journal	July 2019
Evidence for Inside-out Galaxy Growth and Quenching of a z ∼ 2 Compact Galaxy From High-resolution Molecular Gas Imaging Spilker, Justin S.; Bezanson, Rachel; Weiner, Benjamin J. The Astrophysical Journal, Vol. 883, Issue 1 https://doi.org/10.3847/1538-4357/ab3804	journal	September 2019
The Colors and Sizes of Recently Quenched Galaxies: A Result of Compact Starburst before Quenching Wu, Po-Feng; Wel, Arjen van der; Bezanson, Rachel The Astrophysical Journal, Vol. 888, Issue 2 https://doi.org/10.3847/1538-4357/ab5fd9	journal	January 2020
SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients Setton, David J.; Bezanson, Rachel; Suess, Katherine A. The Astrophysical Journal, Vol. 905, Issue 1 https://doi.org/10.3847/1538-4357/abc265	journal	December 2020
Galaxy Sizes Since z = 2 from the Perspective of Stellar Mass Distribution within Galaxies Mosleh, Moein; Hosseinnejad, Shiva; Hosseini-ShahiSavandi, S. Zahra The Astrophysical Journal, Vol. 905, Issue 2 https://doi.org/10.3847/1538-4357/abc7cc	journal	December 2020
Compact Starburst Galaxies with Fast Outflows: Central Escape Velocities and Stellar Mass Surface Densities from Multiband Hubble Space Telescope Imaging Diamond-Stanic, Aleksandar M.; Moustakas, John; Sell, Paul H. The Astrophysical Journal, Vol. 912, Issue 1 https://doi.org/10.3847/1538-4357/abe935	journal	April 2021
Dissecting the Size–Mass and Σ ₁ –Mass Relations at 1.0 < z < 2.5: Galaxy Mass Profiles and Color Gradients as a Function of Spectral Shape Suess, Katherine A.; Kriek, Mariska; Price, Sedona H. The Astrophysical Journal, Vol. 915, Issue 2 https://doi.org/10.3847/1538-4357/abf1e4	journal	July 2021
Searching for Local Counterparts of High-redshift Poststarburst Galaxies in Integral Field Unit Spectroscopic Surveys of Nearby Galaxies Wu, Po-Feng The Astrophysical Journal, Vol. 913, Issue 1 https://doi.org/10.3847/1538-4357/abf493	journal	May 2021
Hyper Suprime-Cam Subaru Strategic Program: A Mass-dependent Slope of the Galaxy Size−Mass Relation at z < 1 Kawinwanichakij, Lalitwadee; Silverman, John D.; Ding, Xuheng The Astrophysical Journal, Vol. 921, Issue 1 https://doi.org/10.3847/1538-4357/ac1f21	journal	October 2021
Now You See It, Now You Don’t: Star Formation Truncation Precedes the Loss of Molecular Gas by ∼100 Myr in Massive Poststarburst Galaxies at z ∼ 0.6 Bezanson, Rachel; Spilker, Justin S.; Suess, Katherine A. The Astrophysical Journal, Vol. 925, Issue 2 https://doi.org/10.3847/1538-4357/ac3dfa	journal	February 2022
SQuIGGL⃗E : Studying Quenching in Intermediate-z Galaxies—Gas, AnguL⃗ar Momentum, and Evolution Suess, Katherine A.; Kriek, Mariska; Bezanson, Rachel The Astrophysical Journal, Vol. 926, Issue 1 https://doi.org/10.3847/1538-4357/ac404a	journal	February 2022
The Compact Structures of Massive z ∼ 0.7 Post-starburst Galaxies in the SQuIGGL⃗E Sample Setton, David J.; Verrico, Margaret; Bezanson, Rachel The Astrophysical Journal, Vol. 931, Issue 1 https://doi.org/10.3847/1538-4357/ac6096	journal	May 2022
The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package* The Astrophysical Journal, Vol. 935, Issue 2 https://doi.org/10.3847/1538-4357/ac7c74	journal	August 2022
Color Gradients and Half-mass Radii of Galaxies Out to z = 2 in the CANDELS/3D-HST Fields: Further Evidence for Important Differences in the Evolution of Mass-weighted and Light-weighted Sizes Miller, Tim B.; van Dokkum, Pieter; Mowla, Lamiya The Astrophysical Journal, Vol. 945, Issue 2 https://doi.org/10.3847/1538-4357/acbc74	journal	March 2023
Kinematics, Structure, and Mass Outflow Rates of Extreme Starburst Galactic Outflows Perrotta, Serena; Coil, Alison L.; Rupke, David S. N. The Astrophysical Journal, Vol. 949, Issue 1 https://doi.org/10.3847/1538-4357/acc660	journal	May 2023
Extending the Dynamic Range of Galaxy Outflow Scaling Relations: Massive Compact Galaxies with Extreme Outflows Davis, Julie D.; Tremonti, Christy A.; Swiggum, Cameren N. The Astrophysical Journal, Vol. 951, Issue 2 https://doi.org/10.3847/1538-4357/accbbf	journal	July 2023
3D-DASH: The Evolution of Size, Shape, and Intrinsic Scatter in Populations of Young and Old Quiescent Galaxies at 0.5 < z < 3 Clausen, Maike; Whitaker, Katherine E.; Momcheva, Ivelina The Astrophysical Journal, Vol. 971, Issue 1 https://doi.org/10.3847/1538-4357/ad528a	journal	August 2024
The Size–Mass Relation at Rest-frame 1.5 μm from JWST/NIRCam in the COSMOS-WEB and PRIMER-COSMOS Fields Martorano, Marco; van der Wel, Arjen; Baes, Maarten The Astrophysical Journal, Vol. 972, Issue 2 https://doi.org/10.3847/1538-4357/ad5c6a	journal	September 2024
JADES Ultrared Flattened Objects: Morphologies and Spatial Gradients in Color and Stellar Populations Gibson, Justus L.; Nelson, Erica; Williams, Christina C. The Astrophysical Journal, Vol. 974, Issue 1 https://doi.org/10.3847/1538-4357/ad64c2	journal	October 2024
Stellar Population Inference with Prospector Johnson, Benjamin D.; Leja, Joel; Conroy, Charlie The Astrophysical Journal Supplement Series, Vol. 254, Issue 2 https://doi.org/10.3847/1538-4365/abef67	journal	May 2021
Siena Galaxy Atlas 2020 Moustakas, John; Lang, Dustin; Dey, Arjun The Astrophysical Journal Supplement Series, Vol. 269, Issue 1 https://doi.org/10.3847/1538-4365/acfaa2	journal	October 2023
THE RELATION BETWEEN GALAXY STRUCTURE AND SPECTRAL TYPE: IMPLICATIONS FOR THE BUILDUP OF THE QUIESCENT GALAXY POPULATION AT 0.5 < z < 2.0 Yano, Michael; Kriek, Mariska; Wel, Arjen van der The Astrophysical Journal, Vol. 817, Issue 2 https://doi.org/10.3847/2041-8205/817/2/L21	journal	January 2016
Massive Quenched Galaxies at z ∼ 0.7 Retain Large Molecular Gas Reservoirs Suess, Katherine A.; Bezanson, Rachel; Spilker, Justin S. The Astrophysical Journal, Vol. 846, Issue 2 https://doi.org/10.3847/2041-8213/aa85dc	journal	September 2017
Stellar Metallicities and Elemental Abundance Ratios of z ∼ 1.4 Massive Quiescent Galaxies Kriek, Mariska; Price, Sedona H.; Conroy, Charlie The Astrophysical Journal, Vol. 880, Issue 2 https://doi.org/10.3847/2041-8213/ab2e75	journal	August 2019
Half-mass Radii of Quiescent and Star-forming Galaxies Evolve Slowly from 0 ≲ z ≤ 2.5: Implications for Galaxy Assembly Histories Suess, Katherine A.; Kriek, Mariska; Price, Sedona H. The Astrophysical Journal, Vol. 885, Issue 1 https://doi.org/10.3847/2041-8213/ab4db3	journal	October 2019
Color Gradients along the Quiescent Galaxy Sequence: Clues to Quenching and Structural Growth Suess, Katherine A.; Kriek, Mariska; Price, Sedona H. The Astrophysical Journal, Vol. 899, Issue 2 https://doi.org/10.3847/2041-8213/abacc9	journal	August 2020
DESI Survey Validation Spectra Reveal an Increasing Fraction of Recently Quenched Galaxies at z ∼ 1 Setton, David J.; Dey, Biprateep; Khullar, Gourav The Astrophysical Journal Letters, Vol. 947, Issue 2 https://doi.org/10.3847/2041-8213/acc9b5	journal	April 2023
Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample Zhou, Rongpu; Newman, Jeffrey A.; Dawson, Kyle S. Research Notes of the AAS, Vol. 4, Issue 10 https://doi.org/10.3847/2515-5172/abc0f4	journal	October 2020
astropy/photutils: 1.8.0 Bradley, Larry https://doi.org/10.5281/zenodo.7946442	software	May 2023