The powerful lens galaxy cluster PLCK G287.0+32.9 (${\theta }_E\sim 43^{\prime \prime }$)

Abstract

We present a new high-precision strong lensing model of PLCK G287.0$+$32.9, a massive lens galaxy cluster at $z=0.383$, with the aim to get an accurate estimation of its effective Einstein radius and total mass distribution. We also present a spectroscopic catalog containing accurate redshift measurements for 490 objects, including multiply-lensed sources and cluster member galaxies. We exploit high-quality spectroscopic data from three pointings of the VLT Multi Unit Spectroscopic Explorer, covering a central $3{\mathrm{arcmin}}^2$ region of the cluster. We complete the spectroscopic catalog by including redshift measurements from VLT-VIMOS and KECK-DEIMOS. We identify 129 spectroscopic cluster member galaxies, with redshift values $0.360\le z\le 0.405$ and $m_{F160W}\le 21$, and 24 photometric ones identified with a Convolutional Neural Network from ancillary HST imaging. We also identify 114 multiple images from 28 background sources, of which 84 images from 16 sources are new and the remaining ones were identified in previous work. The best-fitting lens model shows a root mean square separation value between the predicted and observed positions of the multiple images of $0.75^{\prime \prime }$, corresponding to an improvement in reconstructing the observed positions of the multiple images of a factor of $2.5$ with respect to previous models. Using the predictive power of our new lens model we find 3 new multiple images and we confirm the configuration of three systems of multiple images that were not used for the optimization of the model. The derived total mass distribution confirms this cluster to be a very prominent gravitational lens with an effective Einstein ${\theta }_E=43.4^{\prime \prime }\pm 0.1^{\prime \prime }$, that is in agreement with previous estimates and corresponds to a total mass enclosed in the critical curve of $M_E={3.33}_{-0.07}^{+0.02}\times 10^{14}{M}_{\odot }$.

submitted to "Astronomy & Astrophysics" and accepted the on January 29th 2024

References in corpus (25)

• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• The MUSE second-generation VLT instrument
• A Bayesian approach to strong lensing modelling of galaxy clusters
• The Data Processing Pipeline for the MUSE Instrument
• Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens
• Hubble Space Telescope Combined Strong and Weak Lensing Analysis of the CLASH Sample: Mass and Magnification Models and Systematic Uncertainties
• Multi-scale cluster lens mass mapping I. Strong Lensing modelling
• CLASH-VLT: Insights on the mass substructures in the Frontier Fields Cluster MACS J0416.1-2403 through accurate strong lens modeling
• The Population of Dark Matter Subhaloes: Mass Functions and Average Mass Loss Rates
• An excess of small-scale gravitational lenses observed in galaxy clusters
• COSMOGRAIL XVI: Time delays for the quadruply imaged quasar DES J0408-5354 with high-cadence photometric monitoring
• Mass distribution in the core of MACS J1206: robust modeling from an exceptionally large sample of central multiple images
• The MUSE Deep Lensed Field on the Hubble Frontier Field MACS~J0416
• New high-precision strong lensing modeling of Abell 2744. Preparing for JWST observations
• A new high-precision strong lensing model of the galaxy cluster MACS J0416.1-2403
• A Search for Red Giant Solar-like Oscillations in All Kepler Data
• A persistent excess of galaxy-galaxy strong lensing observed in galaxy clusters
• The probability of galaxy-galaxy strong lensing events in hydrodynamical simulations of galaxy clusters
• MC${}^2$: Subaru and Hubble Space Telescope Weak-Lensing Analysis of the Double Radio Relic Galaxy Cluster PLCK G287.0+32.9
• Lens Model and Time Delay Predictions for the Sextuply Lensed Quasar SDSS J2222+2745
• A state-of-the-art strong lensing model of MACS J0416.1-2403 with the largest sample of spectroscopic multiple images
• VLT/MUSE observations of SDSS J1029+2623: towards a high-precision strong lensing model
• New strong lensing modelling of SDSS J2222+2745 enhanced with VLT/MUSE spectroscopy
• The strongest gravitational lenses: II. Is the large Einstein radius of MACS J0717.5+3745 in conflict with LCDM?
• Exploring the low-mass regime of galaxy-scale strong lensing: Insights into the mass structure of cluster galaxies

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