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Squiggle: Studying Quenching in Intermediate-z Galaxies—Gas, Angular Momentum, and Evolution

Suess, Katherine A; Kriek, Mariska; Bezanson, Rachel; Greene, Jenny E; Setton, David; Spilker, Justin S; Feldmann, Robert; Goulding, Andy D; Johnson, Benjamin D; Leja, Joel; Narayanan, Desika; Hall-Hooper, Khalil; Hunt, Qiana; Lower, Sidney; Verrico, Margaret (2022). Squiggle: Studying Quenching in Intermediate-z Galaxies—Gas, Angular Momentum, and Evolution. The Astrophysical Journal, 926(1):89.

Abstract

We describe the Studying Quenching in Intermediate-z Galaxies: Gas, ${\rm{angu}}\overrightarrow{L}{\rm{ar}}$ momentum, and Evolution ($\mathrm{SQuIGG}\vec{L}{\rm{E}}$) survey of intermediate-redshift post-starburst galaxies. We leverage the large sky coverage of the Sloan Digital Sky Survey to select ∼ 1300 recently quenched galaxies at 0.5 < z ≤ 0.9 based on their unique spectral shapes. These bright, intermediate-redshift galaxies are ideal laboratories to study the physics responsible for the rapid quenching of star formation: they are distant enough to be useful analogs for high-redshift quenching galaxies, but low enough redshift that multiwavelength follow-up observations are feasible with modest telescope investments. We use the Prospector code to infer the stellar population properties and nonparametric star formation histories (SFHs) of all galaxies in the sample. We find that $\mathrm{SQuIGG}\vec{L}{\rm{E}}$ galaxies are both very massive (M* ∼ 1011.25 M⊙) and quenched, with inferred star formation rates ≲1 M⊙ yr−1, more than an order of magnitude below the star-forming main sequence. The best-fit SFHs confirm that these galaxies recently quenched a major burst of star formation: >75% of $\mathrm{SQuIGG}\vec{L}{\rm{E}}$ galaxies formed at least a quarter of their total stellar mass in the recent burst, which ended just ∼200 Myr before observation. We find that $\mathrm{SQuIGG}\vec{L}{\rm{E}}$ galaxies are on average younger and more burst-dominated than most other z ≲ 1 post-starburst galaxy samples. This large sample of bright post-starburst galaxies at intermediate redshift opens a wide range of studies into the quenching process. In particular, the full $\mathrm{SQuIGG}\vec{L}{\rm{E}}$ survey will investigate the molecular gas reservoirs, morphologies, kinematics, resolved stellar populations, active galactic nucleus incidence, and infrared properties of this unique sample of galaxies in order to place definitive constraints on the quenching process.

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Astronomy and Astrophysics
Physical Sciences > Space and Planetary Science
Uncontrolled Keywords:Space and Planetary Science, Astronomy and Astrophysics
Language:English
Date:1 February 2022
Deposited On:21 Nov 2022 10:00
Last Modified:28 Oct 2024 02:38
Publisher:IOP Publishing
ISSN:1538-4357
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.3847/1538-4357/ac404a
Related URLs:https://www.zora.uzh.ch/id/eprint/223327/
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