An improved Magellan weak lensing analysis of the galaxy cluster Abell 2744
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Abriola, Davide Della Pergola, Daniele Lombardi, Marco Bergamini, Pietro Nonino, Mario Grillo, Claudio Rosati, Piero |
| author_facet | Abriola, Davide Della Pergola, Daniele Lombardi, Marco Bergamini, Pietro Nonino, Mario Grillo, Claudio Rosati, Piero |
| contents | We present a new weak lensing analysis of the Hubble Frontier Fields galaxy cluster Abell 2744 ($z$ = 0.308) using new Magellan/MegaCam multi-band $gri$ imaging data. We carry out our study by applying brand-new PSF and shape measurement softwares that allow for the use of multi-band data simultaneously, which we first test on Subaru/Suprime-Cam $BR_cz'$ imaging data of the same cluster. The projected total mass of this system within $2.35 \, \mathrm{Mpc}$ from the south-west BCG is $(2.56 \pm 0.26) \times 10^{15} \, \mathrm{M}_\odot$, which makes Abell 2744 one of the most massive clusters known. This value is consistent, within the errors, with previous weak lensing and dynamical studies. Our analysis reveals the presence of three high-density substructures, thus supporting the picture of a complex merging scenario. This result is also confirmed by a comparison with a recent strong lensing study based on high-resolution JWST imaging. Moreover, our reconstructed total mass profile nicely agrees with an extrapolation of the strong lensing best-fit model up to several Mpc from the BCG centre. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_08364 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An improved Magellan weak lensing analysis of the galaxy cluster Abell 2744 Abriola, Davide Della Pergola, Daniele Lombardi, Marco Bergamini, Pietro Nonino, Mario Grillo, Claudio Rosati, Piero Cosmology and Nongalactic Astrophysics We present a new weak lensing analysis of the Hubble Frontier Fields galaxy cluster Abell 2744 ($z$ = 0.308) using new Magellan/MegaCam multi-band $gri$ imaging data. We carry out our study by applying brand-new PSF and shape measurement softwares that allow for the use of multi-band data simultaneously, which we first test on Subaru/Suprime-Cam $BR_cz'$ imaging data of the same cluster. The projected total mass of this system within $2.35 \, \mathrm{Mpc}$ from the south-west BCG is $(2.56 \pm 0.26) \times 10^{15} \, \mathrm{M}_\odot$, which makes Abell 2744 one of the most massive clusters known. This value is consistent, within the errors, with previous weak lensing and dynamical studies. Our analysis reveals the presence of three high-density substructures, thus supporting the picture of a complex merging scenario. This result is also confirmed by a comparison with a recent strong lensing study based on high-resolution JWST imaging. Moreover, our reconstructed total mass profile nicely agrees with an extrapolation of the strong lensing best-fit model up to several Mpc from the BCG centre. |
| title | An improved Magellan weak lensing analysis of the galaxy cluster Abell 2744 |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.08364 |