Extremely Low Molecular Gas Content in a Compact, Quiescent Galaxy at z=1.522

Abstract

One of the greatest challenges to theoretical models of massive galaxy formation is the regulation of star formation at early times. The relative roles of molecular gas expulsion, depletion, and stabilization are uncertain as direct observational constraints of the gas reservoirs in quenched or quenching galaxies at high redshift are scant. We present ALMA observations of CO(2-1) in a massive ($\log M_{\star }/M_{\odot }=11.2$), recently quenched galaxy at $z=1.522$. The optical spectrum of this object shows strong Balmer absorption lines, which implies that star formation ceased $\sim$0.8 Gyr ago. We do not detect CO(2-1) line emission, placing an upper limit on the molecular ${\mathrm{H}}_2$ gas mass of 1.1$\times 10^{10}{M}_{\odot }$. The implied gas fraction is $f_{{\mathrm{H}}_2}\equiv M_{H_2}/M_{\star }<7\%$, $\sim 10\times$ lower than typical star forming galaxies at similar stellar masses at this redshift, among the lowest gas fractions at this specific star formation rate at any epoch, and the most stringent constraint on the gas contents of a $z>1$ passive galaxy to date. Our observations show that the depletion of ${\mathrm{H}}_2$ from the interstellar medium of quenched objects can be both efficient and fairly complete, in contrast to recent claims of significant cold gas in recently quenched galaxies. We explore the variation in observed gas fractions in high-$z$ galaxies and show that galaxies with high stellar surface density have low $f_{{\mathrm{H}}_2}$, similar to recent correlations between specific star formation rate and stellar surface density.

arXiv comment8 pages, 5 figures, resubmitted to ApJL following referee report

References in corpus (58)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Demography of Massive Dark Objects in Galaxy Centres
• Detailed Structural Decomposition of Galaxy Images
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• The CO-to-H2 Conversion Factor
• The Dependence of Star Formation History and Internal Structure on Stellar Mass for 10^5 Low-Redshift Galaxies
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• 3D-HST WFC3-selected Photometric Catalogs in the Five CANDELS/3D-HST Fields: Photometry, Photometric Redshifts and Stellar Masses
• The Evolution of the Stellar Mass Functions of Star-Forming and Quiescent Galaxies to z = 4 from the COSMOS/UltraVISTA Survey
• High molecular gas fractions in normal massive star forming galaxies in the young Universe
• PHIBSS: molecular gas content and scaling relations in z~1-3 normal star forming galaxies
• Very High Gas Fractions and Extended Gas Reservoirs in z=1.5 Disk Galaxies
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• PHIBSS: Unified Scaling Relations of Gas Depletion Time and Molecular Gas Fractions
• Structural Parameters of Galaxies in CANDELS
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• The NEWFIRM Medium-band Survey: Photometric Catalogs, Redshifts and the Bimodal Color Distribution of Galaxies out to z~3
• Structure and star formation in galaxies out to z=3: evidence for surface density dependent evolution and upsizing
• Galaxy Stellar Mass Functions from ZFOURGE/CANDELS: An Excess of Low-Mass Galaxies Since z=2 and the Rapid Buildup of Quiescent Galaxies
• The Atlas3D project -- IV: the molecular gas content of early-type galaxies
• COLD GASS, an IRAM Legacy Survey of Molecular Gas in Massive Galaxies: II. The non-universality of the Molecular Gas Depletion Timescale
• A General Model for the CO-H2 Conversion Factor in Galaxies with Applications to the Star Formation Law
• The number density and mass density of star-forming and quiescent galaxies at 0.4 < z < 2.2
• A Link Between Star Formation Quenching and Inner Stellar Mass Density in SDSS Central Galaxies
• The Atlas3D project - X. On the origin of the molecular and ionised gas in early-type galaxies
• A massive, quiescent galaxy at redshift of z=3.717
• The impact of interactions, bars, bulges, and AGN on star formation efficiency in local massive galaxies
• Herschel-ATLAS: Rapid evolution of dust in galaxies in the last 5 billion years
• The Dependence of Quenching upon the Inner Structure of Galaxies at 0.5<z< 0.8 in the DEEP2/AEGIS Survey
• The Atlas3D project - XIV. The extent and kinematics of molecular gas in early-type galaxies
• A Large Population of Massive Compact Post-Starburst Galaxies at z>1: Implications for the Size Evolution and Quenching Mechanism of Quiescent Galaxies
• A substantial population of massive quiescent galaxies at z~4 from ZFOURGE
• The CO-H2 Conversion Factor in Disc Galaxies and Mergers
• Deep near-infrared spectroscopy of passively evolving galaxies at z>1.4
• Star formation quenching in massive galaxies
• Predicting Quiescence: The Dependence of Specific Star Formation Rate on Galaxy Size and Central Density at 0.5<z<2.5
• Surface density effects in quenching: cause or effect?
• Stellar mass estimates in early-type galaxies: procedures, uncertainties and models dependence
• Discovery of Large Molecular Gas Reservoirs in Post-Starburst Galaxies
• A Near-Infrared Spectroscopic Survey of K-selected Galaxies at z ~ 2.3: Comparison of Stellar Population Synthesis Codes and Constraints from the Rest-frame NIR
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Molecular gas reservoirs in high-redshift galaxies
• PHIBSS2: survey design and z=0.5-0.8 results. Molecular gas reservoirs during the winding-down of star formation
• The Atlas3D project -- XXVII. Cold Gas and the Colours and Ages of Early-type Galaxies
• The unexpectedly large dust and gas content of quiescent galaxies at z>1.4
• Massive quenched galaxies at z~0.7 retain large molecular gas reservoirs
• Molecular gas reservoirs in cluster galaxies at z=1.46
• Molecular Gas Contents and Scaling Relations for Massive Passive Galaxies at Intermediate Redshifts from the LEGA-C Survey
• Massive and Newly Dead: Discovery of a Significant Population of Galaxies with High Velocity Dispersions and Strong Balmer Lines at z~1.5 from Deep Keck Spectra and HST/WFC3 Imaging
• Deep CO(1-0) Observations of z=1.62 Cluster Galaxies with Substantial Molecular Gas Reservoirs and Normal Star Formation Efficiencies
• A direct constraint on the gas content of a massive, passively evolving elliptical galaxy at z = 1.43
• The MASSIVE Survey - III. Molecular gas and a broken Tully-Fisher relation in the most massive early-type galaxies
• The X-factor in Galaxies: II. The molecular hydrogen -- star formation relation
• Low Gas Fractions Connect Compact Star-Forming Galaxies to their z ~ 2 Quiescent Descendants
• Why Post-Starburst Galaxies are Now Quiescent
• Stellar and Molecular Gas Rotation in a Recently-Quenched Massive Galaxy at z~0.7

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