Molecular Gas Reservoirs in Massive Quiescent Galaxies at $\mathrm{z}\sim 0.7$ Linked to Late Time Star Formation

Abstract

We explore how the presence of detectable molecular gas depends on the inferred star formation histories (SFHs) in 8 massive, quiescent galaxies at $\mathrm{z}\sim 0.7$. Half of the sample have clear detections of molecular gas, traced by CO(2-1). We find that the molecular gas content is unrelated to the rate of star formation decline prior to the most recent 1 Gyr, suggesting that the gas reservoirs are not leftover from their primary star formation epoch. However, the recent SFHs of CO-detected galaxies demonstrate evidence for secondary bursts of star formation in their last Gyr. The fraction of stellar mass formed in these secondary bursts ranges from ${\mathrm{f}}_{\mathrm{burst}}\approx 0.3-6\%$, and ended between $\mathrm{t_{end\mbox{-}burst}\approx0-330~Myr}$ ago. The CO-detected galaxies form a higher fraction of mass in the last Gyr (${\mathrm{f}}_{{\mathrm{M}}_{1Gyr}}=2.6\pm 1.8\%$) compared to the CO-undetected galaxies (${\mathrm{f}}_{{\mathrm{M}}_{1Gyr}}=0.2\pm 0.1\%$). The galaxies with gas reservoirs have enhanced late-time star formation, highlighting this as a contributing factor to the observed heterogeneity in the gas reservoirs in high-redshift quiescent galaxies. We find that the amount of gas and star formation driven by these secondary bursts are inconsistent with that expected from dry minor mergers, and instead are likely driven by recently-accreted gas i.e., gas-rich minor mergers. This conclusion would not have been made based on $\mathrm{SF}{\mathrm{R}}_{\mathrm{UV}+\mathrm{IR}}$ measurements alone, highlighting the power of detailed SFH modeling in the interpretation of gas reservoirs. Larger samples are needed to understand the frequency of low-level rejuvenation among quiescent galaxies at intermediate redshifts, and to what extent this drives the diversity of molecular gas reservoirs.

References in corpus (204)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• Galactic Stellar and Substellar Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Modules for Experiments in Stellar Astrophysics (MESA)
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• How Do Galaxies Get Their Gas?
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• The Host Galaxies and Classification of Active Galactic Nuclei
• The CO-to-H2 Conversion Factor
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• A Unified, Merger-Driven Model for the Origin of Starbursts, Quasars, the Cosmic X-Ray Background, Supermassive Black Holes and Galaxy Spheroids
• Galaxy Bimodality due to Cold Flows and Shock Heating
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• Nearly 5000 Distant Early-Type Galaxies in COMBO-17: a Red Sequence and its Evolution since z~1
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods
• Simba: Cosmological Simulations with Black Hole Growth and Feedback
• Galaxy Luminosity Functions to z~1: DEEP2 vs. COMBO-17 and Implications for Red Galaxy Formation
• Virial shocks in galactic haloes?
• The Evolution of the Stellar Mass Functions of Star-Forming and Quiescent Galaxies to z = 4 from the COSMOS/UltraVISTA Survey
• Minor mergers and the size evolution of elliptical galaxies
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• Dancing in the dark: galactic properties trace spin swings along the cosmic web
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• Calibrating Extinction-Free Star Formation Rate Diagnostics with 33GHz Free-Free Emission in NGC6946
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• Morphological quenching of star formation: making early-type galaxies red
• The Growth of Massive Galaxies Since z=2
• AGN Dusty Tori: II. Observational Implications of Clumpiness
• The First Release COSMOS Optical and Near-IR Data and Catalog
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• An updated MILES stellar library and stellar population models
• The host galaxies of radio-loud AGN: mass dependencies, gas cooling and AGN feedback
• Confirmation of the remarkable compactness of massive quiescent galaxies at z~2.3: early-type galaxies did not form in a simple monolithic collapse
• Stellar Population Inference with Prospector
• The Spitzer Legacy Survey of the HST-ACS 2 sq. deg. COSMOS Field: survey strategy and first analysis
• A comprehensive classification of galaxies in the SDSS: How to tell true from fake AGN?
• AGN Dusty Tori: I. Handling of Clumpy Media
• The CO-to-H2 Conversion Factor and Dust-to-Gas Ratio on Kiloparsec Scales in Nearby Galaxies
• Compaction and Quenching of High-z Galaxies in Cosmological Simulations: Blue and Red Nuggets
• Dust Attenuation Curves in the Local Universe: Demographics and New Laws for Star-forming Galaxies and High-redshift Analogs
• How to Measure Galaxy Star Formation Histories II: Nonparametric Models
• The Relation Between Compact, Quiescent High Redshift Galaxies and Massive Nearby Elliptical Galaxies: Evidence for Hierarchical, Inside-Out Growth
• The Evolution of the Stellar Mass Function of Galaxies from z=4.0 and the First Comprehensive Analysis of its Uncertainties: Evidence for Mass-dependent Evolution
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• The size evolution of galaxies since z~3: combining SDSS, GEMS and FIRES
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• Deriving Physical Properties from Broadband Photometry with Prospector: Description of the Model and a Demonstration of its Accuracy Using 129 Galaxies in the Local Universe
• COSMOS : Hubble Space Telescope Observations
• Wet Disc Contraction to Galactic Blue Nuggets and Quenching to Red Nuggets
• The NEWFIRM Medium-band Survey: Photometric Catalogs, Redshifts and the Bimodal Color Distribution of Galaxies out to z~3
• Galaxy Stellar Mass Functions from ZFOURGE/CANDELS: An Excess of Low-Mass Galaxies Since z=2 and the Rapid Buildup of Quiescent Galaxies
• Can Minor Merging Account for the Size Growth of Quiescent Galaxies? New Results from the CANDELS Survey
• Size evolution of the most massive galaxies at 1.7<z<3 from GOODS NICMOS survey imaging
• [OII] as a Star Formation Rate Indicator
• The Atlas3D project -- IV: the molecular gas content of early-type galaxies
• Nebular Continuum and Line Emission in Stellar Population Synthesis Models
• A Public Ks-selected Catalog in the COSMOS/UltraVISTA Field: Photometry, Photometric Redshifts and Stellar Population Parameters
• Stellar Population Diagnostics of Elliptical Galaxy Formation
• The cosmological size and velocity dispersion evolution of massive early-type galaxies
• The Dust Attenuation Law in Distant Galaxies: Evidence for Variation with Spectral Type
• The VLA-COSMOS 3 GHz Large Project: Continuum data and source catalog release
• IRAC Mid-Infrared Imaging of the Hubble Deep Field South: Star Formation Histories and Stellar Masses of Red Galaxies at z>2
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• What do we learn from IRAC observations of galaxies at 2 < z < 3.5?
• SDSS IV MaNGA - Spatially resolved diagnostic diagrams: A proof that many galaxies are LIERs
• Environment and self-regulation in galaxy formation
• The Baryonic Assembly of Dark Matter Halos
• The Atlas3D project - X. On the origin of the molecular and ionised gas in early-type galaxies
• The Spectral Energy Distributions Of z~8 Galaxies From The IRAC Ultra Deep Fields: Emission Lines, Stellar Masses, And Specific Star Formation Rates At 650 Myr
• Newly-quenched galaxies as the cause for the apparent evolution in average size of the population
• The Assembly History of Field Spheroidals: Evolution of Mass-to-light Ratios and Signatures of Recent Star Formation
• The impact of interactions, bars, bulges, and AGN on star formation efficiency in local massive galaxies
• Compact High-Redshift Galaxies Are the Cores of the Most Massive Present-Day Spheroids
• An Older, More Quiescent Universe from Panchromatic SED Fitting of the 3D-HST Survey
• The VLA-COSMOS Survey. IV. Deep Data and Joint Catalog
• Stellar Kinematics of z~2 Galaxies and the Inside-Out Growth of Quiescent Galaxies
• MOSFIRE Spectroscopy of Quiescent Galaxies at 1.5 < z < 2.5. II - Star Formation Histories and Galaxy Quenching
• Molecular Gas and Star Formation in the SAURON Early-type Galaxies
• The effect of environment on the UV colour-magnitude relation of early-type galaxies
• On the Stellar Populations of Galaxies at z=9-11: The Growth of Metals and Stellar Mass at Early Times
• The VLT LEGA-C Spectroscopic Survey: The Physics of Galaxies at a Lookback Time of 7 Gyr
• Star formation rates and stellar masses of z=7-8 galaxies from IRAC observations of the WFC3/IR ERS and the HUDF field
• Dissecting the size evolution of elliptical galaxies since z~1: puffing up vs minor merging scenarios
• Superdense galaxies and the mass-size relation at low redshift
• The structures and total (minor + major) merger histories of massive galaxies up to z = 3 in the HST GOODS NICMOS Survey: A possible solution to the size evolution problem
• How Well Can We Measure the Stellar Mass of a Galaxy: The Impact of the Assumed Star Formation History Model in SED Fitting
• Fast, Slow, Early, Late: Quenching Massive Galaxies at z~0.8
• Relaxation and Stripping: The Evolution of Sizes, Dispersions and Dark Matter Fractions in Major and Minor Mergers of Elliptical Galaxies
• Low, Milky-Way like, Molecular Gas Excitation of Massive Disk Galaxies at z~1.5
• The role of minor mergers in the recent star formation history of early-type galaxies
• On the Dearth of Compact, Massive, Red Sequence Galaxies in the Local Universe
• The Spectral Energy Distribution of Post-Starburst Galaxies in the NEWFIRM Medium-Band Survey: A Low Contribution from TP-AGB Stars
• Mid-IR Luminosities and UV/Optical Star Formation Rates at z<1.4
• The Rest-Frame Submillimeter Spectrum of High-Redshift, Dusty, Star-Forming Galaxies
• The Detailed Evolution of E+A Galaxies into Early Types
• A New Census of the 0.2< z <3.0 Universe, Part II: The Star-Forming Sequence
• The total infrared luminosity may significantly overestimate the star formation rate of recently quenched galaxies
• Velocity Dispersions and Dynamical Masses for a Large Sample of Quiescent Galaxies at z > 1: Improved Measures of the Growth in Mass and Size
• Constraining The Assembly Of Normal And Compact Passively Evolving Galaxies From Redshift z=3 To The Present With CANDELS
• Surface density effects in quenching: cause or effect?
• It's not easy being green: The evolution of galaxy colour in the EAGLE simulation
• Discovery of Large Molecular Gas Reservoirs in Post-Starburst Galaxies
• The Argo Simulation: I. Quenching of Massive Galaxies at High Redshift as a Result of Cosmological Starvation
• A radio spectral index map and catalogue at 147-1400 MHz covering 80 per cent of the sky
• The stellar mass structure of massive galaxies from z=0 to z=2.5; surface density profiles and half-mass radii
• X-rays across the galaxy population I: tracing the main sequence of star formation
• A coincidence of disturbed morphology and blue UV colour: minor-merger driven star formation in early-type galaxies at z~0.6
• The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release II: dynamical and stellar population properties of z ~< 1 galaxies in the COSMOS field
• Heart of Darkness: the influence of galactic dynamics on quenching star formation in galaxy spheroids
• Fast and slow paths to quiescence: ages and sizes of 400 quiescent galaxies from the LEGA-C survey
• The evolution of the cold interstellar medium in galaxies following a starburst
• The unexpectedly large dust and gas content of quiescent galaxies at z>1.4
• Hot dust in Panchromatic SED Fitting: Identification of AGN and improved galaxy properties
• Star Formation Signatures in Optically Quiescent Early-type Galaxies
• The Pair Fraction of Massive Galaxies at 0 < z < 3
• How dead are dead galaxies? Mid-Infrared fluxes of quiescent galaxies at redshift 0.3 < z < 2.5: implications for star formation rates and dust heating
• The UV colours of high-redshift early-type galaxies: evidence for recent star formation and stellar mass assembly over the last 8 billion years
• The Nature of Massive Transition Galaxies in CANDELS, GAMA, and Cosmological Simulations
• Observational constraints on the specific accretion-rate distribution of X-ray selected AGN
• Connection Between Stellar Mass Distributions Within Galaxies and Quenching Since z =2
• Spitzer 70 and 160-micron Observations of the COSMOS Field
• GALEX UV Color Relations for Nearby Early-Type Galaxies
• Clocking the Evolution of Post-Starburst Galaxies: Methods and First Results
• Massive quenched galaxies at z~0.7 retain large molecular gas reservoirs
• Log-normal star formation histories in simulated and observed galaxies
• Minor Mergers or Progenitor Bias? The Stellar Ages of Small and Large Quenched Early-Type Galaxies
• Half-mass radii of quiescent and star-forming galaxies evolve slowly from 0 < z < 2.5: implications for galaxy assembly histories
• Molecular Gas Contents and Scaling Relations for Massive Passive Galaxies at Intermediate Redshifts from the LEGA-C Survey
• The Slow Death (or Rebirth?) of Extended Star Formation in z~0.1 Green Valley Early-Type Galaxies
• Shocked POststarburst Galaxy Survey II: The Molecular Gas Content and Properties of a Subset of SPOGs
• Simultaneous Modeling of the Stellar and Dust Emission in Distant Galaxies: Implications for Star Formation Rate Measurements
• The intrinsic characteristics of galaxies on the SFR-stellar mass plane at 1.2<z<4: I. the correlation between stellar age, central density and position relative to the main sequence
• Galaxy Zoo: dust and molecular gas in early-type galaxies with prominent dust lanes
• Molecular gas and star formation in the red-sequence counter-rotating disc galaxy NGC 4550
• KMOS-3D Reveals Low-Level Star Formation Activity in Massive Quiescent Galaxies at 0.7 < z < 2.7
• After The Fall: The Dust and Gas in E+A Post-Starburst Galaxies
• Quenching of star formation from a lack of inflowing gas to galaxies
• Inferring the star formation histories of the most massive and passive early-type galaxies at z<0.3
• Constraints on the merging channel of massive galaxies since z~1
• Self-consistent predictions for LIER-like emission lines from post-AGB stars
• The MASSIVE Survey - III. Molecular gas and a broken Tully-Fisher relation in the most massive early-type galaxies
• Rejuvenation in $z\sim 0.8$ quiescent galaxies in LEGA-C
• GOODS-Herschel: Separating High Redshift active galactic Nuclei and star forming galaxies Using Infrared Color Diagnostics
• ALMA measures rapidly depleted molecular gas reservoirs in massive quiescent galaxies at z~1.5
• A direct constraint on the gas content of a massive, passively evolving elliptical galaxy at z = 1.43
• CLEAR II: Evidence for Early Formation of the Most Compact Quiescent Galaxies at High Redshift
• Sub one percent mass fractions of young stars in red massive galaxies
• Rejuvenated galaxies with very old bulges at the origin of the bending of the main sequence and of the "green valley"
• The Interstellar Medium of Quiescent Galaxies and its Evolution With Time
• Extremely Low Molecular Gas Content in a Compact, Quiescent Galaxy at z=1.522
• Evolution of the cold gas properties of simulated post-starburst galaxies
• The Evolution of the Rest-frame V-band Luminosity Function from z=4: A Constant Faint-end Slope over the Last 12 Gyr of Cosmic History
• After The Fall: Resolving the Molecular Gas in Post-Starburst Galaxies
• Purely dry mergers do not explain the observed evolution of massive early-type galaxies since z = 1
• Morphology Dependence Of Stellar Age in Quenched Galaxies at Redshift ~ 1.2: Massive Compact Galaxies Are Older Than More Extended Ones
• The Diverse Molecular Gas Content of Massive Galaxies Undergoing Quenching at z~1
• Mergers and Star Formation: The environment and Stellar Mass Growth of the Progenitors of Ultra-Massive Galaxies since z = 2
• Reconstructing the Assembly of Massive Galaxies. I: The Importance of the Progenitor Effect in the Observed Properties of Quiescent Galaxies at $z\approx 2$
• An ALMA view of star formation efficiency suppression in early-type galaxies after gas-rich minor mergers
• Stellar Dynamics and Star-Formation Histories of z $\sim$ 1 Radio-loud Galaxies
• Evidence of Environmental Quenching at Redshift z ~ 2
• A combined VANDELS and LEGA-C study: the evolution of quiescent galaxy size, stellar mass and age from $\text{z}=0.6$ to $\text{z}=1.3$
• High Molecular-Gas to Dust Mass Ratios Predicted in Most Quiescent Galaxies
• The Evolution of the Interstellar Medium in Post-Starburst Galaxies
• A Bayesian Population Model for the Observed Dust Attenuation in Galaxies
• On the evolution of the central density of quiescent galaxies
• AGN evolution from galaxy evolution viewpoint - II
• Discovery of Counter-Rotating Gas in the Galaxies NGC1596 and NGC3203 and the Incidence of Gas Counter-Rotation in S0 Galaxies
• Why Post-Starburst Galaxies are Now Quiescent
• Recent Star-formation in a Massive Slowly-Quenched Lensed Quiescent Galaxy at z=1.88
• RXJ0848.6+4453: The Evolution of Galaxy Sizes and Stellar Populations in a z=1.27 Cluster
• Early Science with the Large Millimeter Telescope: Constraining the Gas Fraction of a Compact Quiescent Galaxy at z=1.883
• The Effect of Surface Brightness Dimming in the Selection of High-z Galaxies
• Star-Gas Misalignment in Galaxies: II. Origins Found from the Horizon-AGN Simulation
• Clues on the history of early-type galaxies from SDSS spectra and GALEX photometry
• Ubiquitous [OII] Emission in Quiescent Galaxies at z ~ 0.85
• A Herschel-ATLAS study of dusty spheroids: probing the minor-merger process in the local Universe
• Some Die Filthy Rich: The Diverse Molecular Gas Contents of Post-starburst Galaxies Probed by Dust Absorption
• Gas accretion as fuel for residual star formation in Galaxy Zoo elliptical galaxies
• Stellar and Molecular Gas Rotation in a Recently-Quenched Massive Galaxy at z~0.7
• ALMA observations of massive molecular gas reservoirs in dusty early-type galaxies
• Early-type galaxies at intermediate redshift observed with HST WFC3: perspectives on recent star-formation
• Evidence for Non-smooth Quenching in Massive Galaxies at $z\sim 1$

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• In pursuit of giants: II. Evolution of dusty quiescent galaxies over the last six billion years from the hCOSMOS survey
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