COOL-LAMPS II. Characterizing the Size and Star Formation History of a Bright Strongly Lensed Early-Type Galaxy at Redshift 1.02

Abstract

We present COOL J1323+0343, an early-type galaxy at $z=1.0153\pm 0.0006$, strongly lensed by a cluster of galaxies at z = $z=0.353\pm 0.001$. This object was originally imaged by DECaLS and noted as a gravitational lens by COOL-LAMPS, a collaboration initiated to find strong-lensing systems in recent public optical imaging data, and confirmed with follow-up data. With ground-based grzH imaging and optical spectroscopy from the Las Campanas Observatory and the Nordic Optical Telescope, we derive a stellar mass, metallicity, and star-formation history from stellar-population synthesis modeling. The lens modeling implies a total magnification of $\mu \sim$113. The median remnant stellar mass in the source plane is M${}_{\ast }\sim 10.63$ $M_{\odot }$ and the median star-formation rate in the source plane is SFR $\sim 1.55\times 10^{-3}$ M${}_{\odot }$ yr${}^{-1}$ (log sSFR = -13.4 yr${}^{-1}$) in the youngest two age bins (0-100 Myr), closest to the epoch of observation. Our measurements place COOL J1323+0343 below the characteristic mass of the stellar mass function, making it an especially compelling target that could help clarify how intermediate mass quiescent galaxies evolve. We reconstruct COOL J1323+0343 in the source plane and fit its light profile. This object is below the expected size-evolution of early-type galaxy at this mass with an effective radius r${}_e\sim$ 0.5 kpc. This extraordinarily magnified and bright lensed early-type galaxy offers an exciting opportunity to study the morphology and star formation history of an intermediate mass early-type galaxy in detail at $z\sim$1 .

arXiv commentSubmitted to the Astrophysical Journal. 11 pages, 7 figures, and 2 tables. Feedback welcome

References in corpus (78)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Detailed Structural Decomposition of Galaxy Images
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Overview of the DESI Legacy Imaging Surveys
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• 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
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• The Growth of Massive Galaxies Since z=2
• redMaPPer I: Algorithm and SDSS DR8 Catalog
• 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
• A Bayesian approach to strong lensing modelling of galaxy clusters
• A New Method For Galaxy Cluster Detection I: The Algorithm
• 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
• Strong size evolution of the most massive galaxies since z~2
• 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
• Can Minor Merging Account for the Size Growth of Quiescent Galaxies? New Results from the CANDELS Survey
• The Dust Attenuation Law in Distant Galaxies: Evidence for Variation with Spectral Type
• The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry
• The Atacama Cosmology Telescope: A Catalog of > 4000 Sunyaev-Zel'dovich Galaxy Clusters
• A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7
• Evolution of Density Profiles in High-z Galaxies: Compaction and Quenching Inside-Out
• Newly-quenched galaxies as the cause for the apparent evolution in average size of the population
• How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?
• The Formation of Massive, Compact Galaxies at z=2 in the Illustris Simulation
• Compact High-Redshift Galaxies Are the Cores of the Most Massive Present-Day Spheroids
• Extremely compact massive galaxies at z~1.4
• A Large Population of Massive Compact Post-Starburst Galaxies at z>1: Implications for the Size Evolution and Quenching Mechanism of Quiescent Galaxies
• MOSFIRE Spectroscopy of Quiescent Galaxies at 1.5 < z < 2.5. II - Star Formation Histories and Galaxy Quenching
• Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey
• The VANDELS survey: the star-formation histories of massive quiescent galaxies at 1.0 < z < 1.3
• The VLT LEGA-C Spectroscopic Survey: The Physics of Galaxies at a Lookback Time of 7 Gyr
• CMU DeepLens: Deep Learning For Automatic Image-based Galaxy-Galaxy Strong Lens Finding
• Fast, Slow, Early, Late: Quenching Massive Galaxies at z~0.8
• Stellar populations from spectroscopy of a large sample of quiescent galaxies at z > 1: Measuring the contribution of progenitor bias to early size growth
• Cosmic Evolution of Size and Velocity Dispersion for Early Type Galaxies
• Half-mass radii for ~7,000 galaxies at 1.0 < z < 2.5: most of the evolution in the mass-size relation is due to color gradients
• The relative abundance of compact and normal massive early-type galaxies and its evolution from redshift z~2 to the present
• NGC1277: a massive compact relic galaxy in the nearby Universe
• Velocity Dispersions and Dynamical Masses for a Large Sample of Quiescent Galaxies at z > 1: Improved Measures of the Growth in Mass and Size
• A Near-Infrared Spectroscopic Survey of K-selected Galaxies at z~2.3: Redshifts and Implications for Broadband Photometric Studies
• Keck Spectroscopy of z>1 Field Spheroidals: Dynamical Constraints on the Growth Rate of Red "Nuggets"
• Size and velocity-dispersion evolution of early-type galaxies in a Lambda cold dark matter universe
• Finding Strong Gravitational Lenses in the DESI DECam Legacy Survey
• Discovering New Strong Gravitational Lenses in the DESI Legacy Imaging Surveys
• The formation of massive, quiescent galaxies at cosmic noon
• Two new confirmed massive relic galaxies: red nuggets in the present-day Universe
• Spatially Resolved Stellar Kinematics from LEGA-C: Increased Rotational Support in z~0.8 Quiescent 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
• Strong Lens Models for 37 Clusters of Galaxies from the SDSS Giant Arcs Survey
• Quenching of star formation from a lack of inflowing gas to galaxies
• Resolving Quiescent Galaxies at $z\gtrsim 2$: I. Search for Gravitationally Lensed Sources and Characterization of their Structure, Stellar Populations, and Line Emission
• Lightcurves of Type Ia Supernovae from Near the Time of Explosion
• Red nuggets grow inside-out: evidence from gravitational lensing
• Resolved Multi-element Stellar Chemical Abundances in the Brightest Quiescent Galaxy at z $\sim$ 2
• A bright, spatially extended lensed galaxy at z = 1.7 behind the cluster RCS2 032727-132623
• An exquisitely deep view of quenching galaxies through the gravitational lens: Stellar population, morphology, and ionized gas
• Recent Star-formation in a Massive Slowly-Quenched Lensed Quiescent Galaxy at z=1.88
• REQUIEM-2D: Spatially Resolved Stellar Populations from HST 2D Grism Spectroscopy
• COOL-LAMPS I. An Extraordinarily Bright Lensed Galaxy at Redshift 5.04
• Two Moderate-Redshift Analogs to Compact Massive Early-Type Galaxies at High Redshifts
• A Search for Moderate-Redshift Survivors from the Population of Luminous Compact Passive Galaxies at High Redshift
• The FourStar Infrared Camera
• Compact Quiescent Galaxies at Intermediate Redshifts

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• JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc
• COOL-LAMPS III: Discovery of a 25".9 Separation Quasar Lensed by a Merging Galaxy Cluster
• A Glimpse of the Stellar Populations and Elemental Abundances of Gravitationally Lensed, Quiescent Galaxies at $z\gtrsim 1$ with Keck Deep Spectroscopy
• COOL-LAMPS IV: A Sample of Bright Strongly-Lensed Galaxies at $3<z<4$
• COOL-LAMPS. VII. Quantifying Strong-lens Scaling Relations with 177 Cluster-scale Strong Gravitational Lenses in DECaLS