The next step in galaxy cluster strong lensing: modeling the surface brightness of multiply-imaged sources
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Acebron, Ana Grillo, Claudio Suyu, Sherry H. Angora, Giuseppe Bergamini, Pietro Caminha, Gabriel B. Ertl, Sebastian Mercurio, Amata Nonino, Mario Rosati, Piero Wang, Han Bolamperti, Andrea Meneghetti, Massimo Schuldt, Stefan Vanzella, Eros |
| author_facet | Acebron, Ana Grillo, Claudio Suyu, Sherry H. Angora, Giuseppe Bergamini, Pietro Caminha, Gabriel B. Ertl, Sebastian Mercurio, Amata Nonino, Mario Rosati, Piero Wang, Han Bolamperti, Andrea Meneghetti, Massimo Schuldt, Stefan Vanzella, Eros |
| contents | Overcoming both modeling and computational challenges, we present, for the first time, the extended surface-brightness distribution model of a strongly-lensed source in a complex galaxy-cluster-scale system. We exploit the high-resolution Hubble Space Telescope (HST) imaging and extensive Multi Unit Spectroscopic Explorer spectroscopy to build an extended strong-lensing model, in a full multi-plane formalism, of SDSS J1029+2623, a lens cluster at $z = 0.588$ with three multiple images of a background quasar ($z = 2.1992$). Going beyond typical cluster strong-lensing modeling techniques, we include as observables both the positions of 26 pointlike multiple images from seven background sources, spanning a wide redshift range between 1.02 and 5.06, and the extended surface-brightness distribution of the strongly-lensed quasar host galaxy, over $\sim78000$ HST pixels. In addition, we model the light distribution of seven objects, angularly close to the strongly-lensed quasar host, over $\sim9300$ HST pixels. Our extended lens model reproduces well both the observed intensity and morphology of the quasar host galaxy in the HST F160W band (with a 0''.03 pixel scale). The reconstructed source shows a single, compact, and smooth surface-brightness distribution, for which we estimate an intrinsic magnitude of 23.3 $\pm$ 0.1 in the F160W band and a half-light radius of (2.39 $\pm$ 0.03) kpc. The increased number of observables enables the accurate determination of the total mass of line-of-sight halos lying angularly close to the extended arc. This work paves the way for a new generation of galaxy cluster strong-lens models, where additional, complementary lensing observables are directly incorporated as model constraints. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01883 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The next step in galaxy cluster strong lensing: modeling the surface brightness of multiply-imaged sources Acebron, Ana Grillo, Claudio Suyu, Sherry H. Angora, Giuseppe Bergamini, Pietro Caminha, Gabriel B. Ertl, Sebastian Mercurio, Amata Nonino, Mario Rosati, Piero Wang, Han Bolamperti, Andrea Meneghetti, Massimo Schuldt, Stefan Vanzella, Eros Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Overcoming both modeling and computational challenges, we present, for the first time, the extended surface-brightness distribution model of a strongly-lensed source in a complex galaxy-cluster-scale system. We exploit the high-resolution Hubble Space Telescope (HST) imaging and extensive Multi Unit Spectroscopic Explorer spectroscopy to build an extended strong-lensing model, in a full multi-plane formalism, of SDSS J1029+2623, a lens cluster at $z = 0.588$ with three multiple images of a background quasar ($z = 2.1992$). Going beyond typical cluster strong-lensing modeling techniques, we include as observables both the positions of 26 pointlike multiple images from seven background sources, spanning a wide redshift range between 1.02 and 5.06, and the extended surface-brightness distribution of the strongly-lensed quasar host galaxy, over $\sim78000$ HST pixels. In addition, we model the light distribution of seven objects, angularly close to the strongly-lensed quasar host, over $\sim9300$ HST pixels. Our extended lens model reproduces well both the observed intensity and morphology of the quasar host galaxy in the HST F160W band (with a 0''.03 pixel scale). The reconstructed source shows a single, compact, and smooth surface-brightness distribution, for which we estimate an intrinsic magnitude of 23.3 $\pm$ 0.1 in the F160W band and a half-light radius of (2.39 $\pm$ 0.03) kpc. The increased number of observables enables the accurate determination of the total mass of line-of-sight halos lying angularly close to the extended arc. This work paves the way for a new generation of galaxy cluster strong-lens models, where additional, complementary lensing observables are directly incorporated as model constraints. |
| title | The next step in galaxy cluster strong lensing: modeling the surface brightness of multiply-imaged sources |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2410.01883 |