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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.08360 |
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| _version_ | 1866911433994797056 |
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| author | Li, Yicheng Fu, Liping Luo, Wentao Liu, Binyang Du, Wei Kilbinger, Martin Murray, Calum Miller, Christopher J. Wang, Ray Turner, David Miller, Lance Liu, Dezi Radovich, Mario Kneib, Jean-Paul Shan, Huanyuan Mai, Kaiwen Wang, Zicheng Zhao, Haoran |
| author_facet | Li, Yicheng Fu, Liping Luo, Wentao Liu, Binyang Du, Wei Kilbinger, Martin Murray, Calum Miller, Christopher J. Wang, Ray Turner, David Miller, Lance Liu, Dezi Radovich, Mario Kneib, Jean-Paul Shan, Huanyuan Mai, Kaiwen Wang, Zicheng Zhao, Haoran |
| contents | We present a multi-wavelength analysis of the galaxy cluster RXCJ0110.0+1358 ($z=0.058$), a rotating cluster candidate, combining deep CFHT imaging, SDSS photometry, spectroscopic redshifts, and XMM-Newton X-ray observations. We find a notable discrepancy between the optical and X-ray views: while optical data reveal a pronounced bimodal galaxy distribution with significant kinematic substructure signatures, the X-ray emission exhibits a single, smoothly extended component centered on the BCG. Our weak lensing analysis resolves this discrepancy by revealing that the mass is predominantly concentrated in the southeast ($\log M_{200}/M_\odot = 14.04_{-0.40}^{+0.24}$), while the northwestern substructure has a negligible mass ($\sim 10^{13} M_\odot$). This immense mass disparity rules out the dynamical possibility of a rotating system. We demonstrate that the apparent optical bimodality arises from the projection of a filament, which led optical group-finding algorithms to misclassify these galaxies as cluster members. This contamination creates a spurious substructure that mimics a rotation signal and leads to an overestimation of the luminosity-based halo mass, resolving the observed inconsistencies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_08360 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | CFHT MegaCam Two Deep Fields Imaging Survey (2DFIS) II: Decoding the Lensing Profile of a "Rotating" Cluster with Deep CFHT Imaging Li, Yicheng Fu, Liping Luo, Wentao Liu, Binyang Du, Wei Kilbinger, Martin Murray, Calum Miller, Christopher J. Wang, Ray Turner, David Miller, Lance Liu, Dezi Radovich, Mario Kneib, Jean-Paul Shan, Huanyuan Mai, Kaiwen Wang, Zicheng Zhao, Haoran Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics We present a multi-wavelength analysis of the galaxy cluster RXCJ0110.0+1358 ($z=0.058$), a rotating cluster candidate, combining deep CFHT imaging, SDSS photometry, spectroscopic redshifts, and XMM-Newton X-ray observations. We find a notable discrepancy between the optical and X-ray views: while optical data reveal a pronounced bimodal galaxy distribution with significant kinematic substructure signatures, the X-ray emission exhibits a single, smoothly extended component centered on the BCG. Our weak lensing analysis resolves this discrepancy by revealing that the mass is predominantly concentrated in the southeast ($\log M_{200}/M_\odot = 14.04_{-0.40}^{+0.24}$), while the northwestern substructure has a negligible mass ($\sim 10^{13} M_\odot$). This immense mass disparity rules out the dynamical possibility of a rotating system. We demonstrate that the apparent optical bimodality arises from the projection of a filament, which led optical group-finding algorithms to misclassify these galaxies as cluster members. This contamination creates a spurious substructure that mimics a rotation signal and leads to an overestimation of the luminosity-based halo mass, resolving the observed inconsistencies. |
| title | CFHT MegaCam Two Deep Fields Imaging Survey (2DFIS) II: Decoding the Lensing Profile of a "Rotating" Cluster with Deep CFHT Imaging |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2602.08360 |