Discovery of a Strong Lensing Galaxy Embedded in a Cluster at z = 1.62

Abstract

We identify a strong lensing galaxy in the cluster IRC 0218 (also known as XMM-LSS J02182$-$05102) that is spectroscopically confirmed to be at $z=1.62$, making it the highest-redshift strong lens galaxy known. The lens is one of the two brightest cluster galaxies and lenses a background source galaxy into an arc and a counterimage. With Hubble Space Telescope (HST) grism and Keck/LRIS spectroscopy, we measure the source redshift to be $z_{\mathrm{S}}=2.26$. Using HST imaging in ACS/F475W, ACS/F814W, WFC3/F125W, and WFC3/F160W, we model the lens mass distribution with an elliptical power-law profile and account for the effects of the cluster halo and nearby galaxies. The Einstein radius is ${\theta }_{\mathrm{E}}=0.38_{-0.01}^{+0.02}$" ($3.2_{-0.1}^{+0.2}$ kpc) and the total enclosed mass is M${}_{\mathrm{tot}}(<{\theta }_{\mathrm{E}})=1.8_{-0.1}^{+0.2}\times 10^{11}{\mathrm{M}}_{\odot }$. We estimate that the cluster environment contributes $\sim 10$% of this total mass. Assuming a Chabrier IMF, the dark matter fraction within ${\theta }_{\mathrm{E}}$ is $f_{\mathrm{DM}}^{\mathrm{Chab}}=0.3_{-0.3}^{+0.1}$, while a Salpeter IMF is marginally inconsistent with the enclosed mass ($f_{\mathrm{DM}}^{\mathrm{Salp}}=-0.3_{-0.5}^{+0.2}$). The total magnification of the source is ${\mu }_{\mathrm{tot}}=2.1_{-0.3}^{+0.4}$. The source has at least one bright compact region offset from the source center. Emission from Ly$\alpha$ and [O III] are likely to probe different regions in the source.

arXiv commentAccepted for publication in ApJL; emulateapj format; 6 pages, 3 figures, 1 table

References in corpus (36)

• Galactic Stellar and Substellar Initial Mass Function
• The Structure of Cold Dark Matter Halos
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• Optimal Techniques in Two-dimensional Spectroscopy: Background Subtraction for the 21st Century
• A systematic variation of the stellar initial mass function in early-type galaxies
• The Sloan Lens ACS Survey. III - The Structure and Formation of Early-type Galaxies and their Evolution since z~1
• Accurate universal models for the mass accretion histories and concentrations of dark matter halos
• CANDELS Multiwavelength catalogs: Source Identification and Photometry in the CANDELS UKIDSS Ultra-Deep Survey Field
• A Spitzer-Selected Galaxy Cluster at z=1.62
• A Bayesian analysis of regularised source inversions in gravitational lensing
• Reversal of Fortune: Confirmation of an Increasing Star Formation-Density Relation in a Cluster at z=1.62
• Dark Matter Contraction and the Stellar Content of Massive Early-type Galaxies: Disfavoring "Light" Initial Mass Functions
• The SL2S Galaxy-scale Lens Sample. IV. The dependence of the total mass density profile of early-type galaxies on redshift, stellar mass, and size
• The Halos of Satellite Galaxies: the Companion of the Massive Elliptical Lens SL2S J08544-0121
• Evidence for dark matter contraction and a Salpeter IMF in a massive early-type galaxy
• Disentangling Baryons and Dark Matter in the Spiral Gravitational Lens B1933+503
• CANDELS Observations of the Structural Properties and Evolution of Galaxies in a Cluster at z=1.62
• Diffuse Lyman-alpha Halos around Galaxies at z=2.2-6.6: Implications for Galaxy Formation and Cosmic Reionization
• The Sloan Lens ACS Survey. VIII. The relation between environment and internal structure of early-type galaxies
• The spectroscopically confirmed X-ray cluster at z=1.62 with a possible companion in the Subaru/XMM-Newton deep field
• A Spectroscopic Study of the Environments of Gravitational Lens Galaxies
• Dynamical Versus Stellar Masses in Compact Early-Type Galaxies: Further Evidence for Systematic Variation in the Stellar Initial Mass Function
• A low-mass cut-off near the hydrogen burning limit for Salpeter-like initial mass functions in early-type galaxies
• The Effect of Environment on Shear in Strong Gravitational Lenses
• 3D-HST Grism Spectroscopy of a Gravitationally Lensed, Low-metallicity Starburst Galaxy at z=1.847
• A Keck Spectroscopic Survey of MS1054-03 (z=0.83): Forming the Red Sequence
• Searching for Neutral Hydrogen Halos around z ~ 2.1 and z ~ 3.1 Ly-alpha Emitting Galaxies
• Major Cluster Mergers and the Location of the Brightest Cluster Galaxy
• IDCS J1426.5+3508: Cosmological implications of a massive, strong lensing cluster at Z = 1.75
• A Chandra view of the z=1.62 galaxy cluster IRC-0218A
• Discovery of a Quadruple Lens in CANDELS with a Record Lens Redshift z=1.53

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• Planck's Dusty GEMS. III. A massive lensing galaxy with a bottom-heavy stellar initial mass function at z=1.5
• The COSMOS-Web ring: in-depth characterization of an Einstein ring lensing system at z~2
• J1721+8842: The first Einstein zig-zag lens
• Strong Lensing Model of SPT-CLJ0356-5337, a Major Merger Candidate at Redshift 1.0359
• Lower mass normalization of the stellar initial mass function for dense massive early-type galaxies at z ~ 1.4
• The COSMOS-Web ring: Spectroscopic confirmation of the background source at z = 5.1
• A spectroscopically confirmed z=1.327 galaxy-scale deflector magnifying a z~8 Lyman-Break galaxy in the Brightest of Reionizing Galaxies survey
• Schwarzschild Lensing From Geodesic Deviation
• Many body gravity and the galaxy rotation curves
• Optical+NIR analysis of a Newly Confirmed Einstein ring at z$\sim$1 from the Kilo-Degree Survey: Dark matter fraction, total and dark matter density slope and IMF
• Many body gravity and the bullet cluster
• The AGEL Survey: Spectroscopic Confirmation of Strong Gravitational Lenses in the DES and DECaLS Fields Selected Using Convolutional Neural Networks
• Milky-Way-like stars in a galaxy core 8 billion years ago revealed by gravitational lensing