RELICS: High-resolution Constraints on the Inner Mass Distribution of the z = 0.83 Merging Cluster RXJ0152.7-1357 from Strong Lensing

Acebron, AnaAnaAcebronAlon, MayMayAlonZitrin, AdiAdiZitrinMahler, GuillaumeGuillaumeMahlerCoe, DanDanCoeSharon, KerenKerenSharonCibirka, NatháliaNatháliaCibirkaBradač, MarušaMarušaBradačTrenti, MicheleMicheleTrentiUmetsu, KeiichiKeiichiUmetsuAndrade-Santos, FelipeFelipeAndrade-SantosAvila, Roberto J.Roberto J.AvilaBradley, LarryLarryBradleyCarrasco, DanielaDanielaCarrascoCerny, CatherineCatherineCernyCzakon, Nicole G.Nicole G.CzakonDawson, William A.William A.DawsonFrye, BrendaBrendaFryeHoag, Austin T.Austin T.HoagHuang, Kuang-HanKuang-HanHuangJohnson, Traci L.Traci L.JohnsonJones, ChristineChristineJonesKikuchihara, ShotaroShotaroKikuchiharaLam, DanielDanielLamLivermore, Rachael C.Rachael C.LivermoreLOVISARI, LORENZOLORENZOLOVISARIMainali, RameshRameshMainaliOesch, Pascal A.Pascal A.OeschOgaz, SaraSaraOgazOuchi, MasamiMasamiOuchiPast, MatthewMatthewPastPaterno-Mahler, RachelRachelPaterno-MahlerPeterson, AveryAveryPetersonRyan, Russell E.Russell E.RyanSalmon, BrettBrettSalmonSendra-Server, IreneIreneSendra-ServerStark, Daniel P.Daniel P.StarkStrait, VictoriaVictoriaStraitToft, SuneSuneToftVulcani, BenedettaBenedettaVulcani2020-12-172020-12-1720190004-637Xhttp://hdl.handle.net/20.500.12386/28942Strong gravitational lensing (SL) is a powerful means of mapping the distribution of dark matter. In this work, we perform an SL analysis of the prominent X-ray cluster RXJ0152.7-1357 (z = 0.83, also known as CL0152.7-1357) in Hubble Space Telescope images, taken in the framework of the Reionization Lensing Cluster Survey (RELICS). On top of a previously known z = 3.93 galaxy multiply imaged by RXJ0152.7-1357, for which we identify an additional multiple image, guided by a light-traces-mass approach, we identify seven new sets of multiply imaged background sources lensed by this cluster, spanning the redshift range [1.79-3.93]. A total of 25 multiple images are seen over a small area of ∼0.4 arcmin<SUP>2</SUP>, allowing us to put relatively high-resolution constraints on the inner matter distribution. Although modestly massive, the high degree of substructure, together with its very elongated shape, makes RXJ0152.7-1357 a very efficient lens for its size. This cluster also comprises the third-largest sample of z ∼ 6-7 candidates in the RELICS survey. Finally, we present a comparison of our resulting mass distribution and magnification estimates with those from a Lenstool model. These models are made publicly available through the Mikulski Archive for Space Telescopes.STAMPAenRELICS: High-resolution Constraints on the Inner Mass Distribution of the z = 0.83 Merging Cluster RXJ0152.7-1357 from Strong LensingArticle10.3847/1538-4357/ab0adf2-s2.0-85064434316000463102400004https://iopscience.iop.org/article/10.3847/1538-4357/ab0adf2019ApJ...874..132AFIS/04 - FISICA NUCLEARE E SUBNUCLEARE