The role of supercluster filaments in shaping galaxy clusters
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Baier-Soto, Raúl Jaffé, Yara Finoguenov, Alexis Haines, P. Christopher Merluzzi, Paola Méndez-Hernández, Hugo Monachesi, Antonela Kuchner, Ulrike Smith, Rory Tejos, Nicolas Sifón, Cristóbal Argudo-Fernández, Maria Bom, C. R. Comparat, Johan Demarco, Ricardo Haack, F. Rodrigo Lacerna, Ivan Lima, E. V. R. Lima-Dias, Ciria Lösch, Elismar de Oliveira, C. Mendes Pallero, Diego Sodré Jr, Laerte Teixeira, S. M. Gabriel Alghamdi, O. Almeida-Fernandes, F. Barsanti, Stefania Bilton, E. Lawrence Canducci, M. Carvalho, Maiara D'Ago, Giuseppe Fritz, Alexander Herpich, R. Fábio Ibar, E. Kim, Hyowon Lopez, Sebastian Moretti, Alessia Nakazono, L. M. I. Olave-Rojas, D. E. Schwarz, G. B. Oliveira Piraino-Cerda, Franco Pompei, Emanuela Rescigno, U. Roukema, F. Boudewijn Sampaio, V. M. Tiño, P. Vásquez-Bustos, P. |
| author_facet | Baier-Soto, Raúl Jaffé, Yara Finoguenov, Alexis Haines, P. Christopher Merluzzi, Paola Méndez-Hernández, Hugo Monachesi, Antonela Kuchner, Ulrike Smith, Rory Tejos, Nicolas Sifón, Cristóbal Argudo-Fernández, Maria Bom, C. R. Comparat, Johan Demarco, Ricardo Haack, F. Rodrigo Lacerna, Ivan Lima, E. V. R. Lima-Dias, Ciria Lösch, Elismar de Oliveira, C. Mendes Pallero, Diego Sodré Jr, Laerte Teixeira, S. M. Gabriel Alghamdi, O. Almeida-Fernandes, F. Barsanti, Stefania Bilton, E. Lawrence Canducci, M. Carvalho, Maiara D'Ago, Giuseppe Fritz, Alexander Herpich, R. Fábio Ibar, E. Kim, Hyowon Lopez, Sebastian Moretti, Alessia Nakazono, L. M. I. Olave-Rojas, D. E. Schwarz, G. B. Oliveira Piraino-Cerda, Franco Pompei, Emanuela Rescigno, U. Roukema, F. Boudewijn Sampaio, V. M. Tiño, P. Vásquez-Bustos, P. |
| contents | In a hierarchical $Λ$CDM Universe, cosmic filaments serve as the primary channels for matter accretion into galaxy clusters, influencing the shape of their dark matter halos. We investigate whether the elongation of galaxy clusters correlates with the orientation of surrounding filaments, providing the first observational test of this relationship in large supercluster regions. We identified and characterized cosmic filaments in two dimensions within the two superclusters that are part of the low-redshift sub-survey of the Chilean Cluster Galaxy Evolution Survey (CHANCES): the Shapley supercluster and the Horologium-Reticulum supercluster. We analyzed the alignment between filament directions -- traced by galaxy distributions -- and the triaxiality of cluster gravitational potentials -- traced by X-ray emission- using publicly available optical and X-ray data. We have found that most (82%) of the X-ray clusters are associated with and interconnected by the optically detected filaments. The clusters-filaments alignment analysis shows that the elongation of most clusters is well aligned with nearby filaments, providing observational confirmation of theoretical predictions, with the alignment progressively reducing at larger cluster-centric distances ($> 1.6 r_{200}$). Overall, our results support the notion that filaments are the main source of galaxy accretion at redshift below 0.1 and additionally provide evidence that matter accretion through filaments shapes the gravitational potential of galaxy clusters. We propose this measurement as a simple observational proxy to determine the direction of accretion in clusters, which is key to understanding both galaxy evolution and the merger history of galaxy clusters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_23311 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The role of supercluster filaments in shaping galaxy clusters Baier-Soto, Raúl Jaffé, Yara Finoguenov, Alexis Haines, P. Christopher Merluzzi, Paola Méndez-Hernández, Hugo Monachesi, Antonela Kuchner, Ulrike Smith, Rory Tejos, Nicolas Sifón, Cristóbal Argudo-Fernández, Maria Bom, C. R. Comparat, Johan Demarco, Ricardo Haack, F. Rodrigo Lacerna, Ivan Lima, E. V. R. Lima-Dias, Ciria Lösch, Elismar de Oliveira, C. Mendes Pallero, Diego Sodré Jr, Laerte Teixeira, S. M. Gabriel Alghamdi, O. Almeida-Fernandes, F. Barsanti, Stefania Bilton, E. Lawrence Canducci, M. Carvalho, Maiara D'Ago, Giuseppe Fritz, Alexander Herpich, R. Fábio Ibar, E. Kim, Hyowon Lopez, Sebastian Moretti, Alessia Nakazono, L. M. I. Olave-Rojas, D. E. Schwarz, G. B. Oliveira Piraino-Cerda, Franco Pompei, Emanuela Rescigno, U. Roukema, F. Boudewijn Sampaio, V. M. Tiño, P. Vásquez-Bustos, P. Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies In a hierarchical $Λ$CDM Universe, cosmic filaments serve as the primary channels for matter accretion into galaxy clusters, influencing the shape of their dark matter halos. We investigate whether the elongation of galaxy clusters correlates with the orientation of surrounding filaments, providing the first observational test of this relationship in large supercluster regions. We identified and characterized cosmic filaments in two dimensions within the two superclusters that are part of the low-redshift sub-survey of the Chilean Cluster Galaxy Evolution Survey (CHANCES): the Shapley supercluster and the Horologium-Reticulum supercluster. We analyzed the alignment between filament directions -- traced by galaxy distributions -- and the triaxiality of cluster gravitational potentials -- traced by X-ray emission- using publicly available optical and X-ray data. We have found that most (82%) of the X-ray clusters are associated with and interconnected by the optically detected filaments. The clusters-filaments alignment analysis shows that the elongation of most clusters is well aligned with nearby filaments, providing observational confirmation of theoretical predictions, with the alignment progressively reducing at larger cluster-centric distances ($> 1.6 r_{200}$). Overall, our results support the notion that filaments are the main source of galaxy accretion at redshift below 0.1 and additionally provide evidence that matter accretion through filaments shapes the gravitational potential of galaxy clusters. We propose this measurement as a simple observational proxy to determine the direction of accretion in clusters, which is key to understanding both galaxy evolution and the merger history of galaxy clusters. |
| title | The role of supercluster filaments in shaping galaxy clusters |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.23311 |