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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.22166 |
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| _version_ | 1866911538367954944 |
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| author | Eskandarlou, Sepideh Akhlaghi, Mohammad Arizo-Borillo, Francisco Knapen, Johan H. Sánchez, Helena Domínguez Fernández-Ontiveros, Juan Antonio López-Sanjuan, Carlos Delgado, Rosa María González Teja, Yolanda Jiménez Dupke, Renato Revaz, Yves Jablonka, Pascale Roca-Fábrega, Santi Miró-Carretero, Juan Martínez-Delgado, David Lumbreras-Calle, Alejandro Hernán-Caballero, Antonio Ramió, Héctor Vázquez Infante-Sainz, Raúl Chies-Santos, Ana L. Ederoclite, Alessandro Martín, Julio Esteban Rodríguez Abramo, Raul Alcaniz, Jailson Benitez, Narciso Bonoli, Silvia Zaragoza, Javier Carneiro, Saulo Cenarro, Javier Cristóbal-Hornillos, David Daflon, Simone Hernández-Monteagudo, Carlos Liu, Jifeng Franch, Antonio Marín de Oliveira, Claudia Mendes Moles, Mariano Roig, Fernando Sodré Jr., Laerte Taylor, Keith Varela, Jesús Vilchez, José Manuel |
| author_facet | Eskandarlou, Sepideh Akhlaghi, Mohammad Arizo-Borillo, Francisco Knapen, Johan H. Sánchez, Helena Domínguez Fernández-Ontiveros, Juan Antonio López-Sanjuan, Carlos Delgado, Rosa María González Teja, Yolanda Jiménez Dupke, Renato Revaz, Yves Jablonka, Pascale Roca-Fábrega, Santi Miró-Carretero, Juan Martínez-Delgado, David Lumbreras-Calle, Alejandro Hernán-Caballero, Antonio Ramió, Héctor Vázquez Infante-Sainz, Raúl Chies-Santos, Ana L. Ederoclite, Alessandro Martín, Julio Esteban Rodríguez Abramo, Raul Alcaniz, Jailson Benitez, Narciso Bonoli, Silvia Zaragoza, Javier Carneiro, Saulo Cenarro, Javier Cristóbal-Hornillos, David Daflon, Simone Hernández-Monteagudo, Carlos Liu, Jifeng Franch, Antonio Marín de Oliveira, Claudia Mendes Moles, Mariano Roig, Fernando Sodré Jr., Laerte Taylor, Keith Varela, Jesús Vilchez, José Manuel |
| contents | Galaxies frequently interact with nearby systems, a process that can significantly alter their morphology and star formation activity. However, spectroscopic studies of their faint and diffuse remnants require very long exposure times and often exceed the limited field of view of integral field units (IFUs). On the other hand, broad-band imaging can have a much wider field of view, but lacks the spectral resolution to identify key spectral features, restricting accurate constraints on stellar population properties. With its 54 narrow-band filters in the optical and wide coverage (planned 8000 square degrees), J-PAS fills this gap. In this case study, we examine PGC 3087775, a massive galaxy at z = 0.046179 (~ 201 Mpc) in the later stages of a major merger in the J-PAS early data release. Photometry was validated with MaNGA IFU data (for the central part). Stellar population properties was derived using both J-PAS and SDSS photometry. SDSS indicates a metal-rich population with an extended star formation history (SFH) and elevated star formation rates. J-PAS instead points to a less metal-rich population with moderate extinction and a more rapid SFH, consistent with a quenched stellar population. The average Dn(4000) index of the tidal features is 1.24, suggesting that it was a non-dry merger and a fourfold improvement in the precision of stellar mass and Dn (4000) was found with J-PAS. We also assessed two heuristic methods for estimating the mass-to-light ratio from SDSS filters and found that they overestimate the stellar mass in this galaxy by 0.5 dex and 0.4 dex relative to SED fitting results from J-PAS and SDSS, respectively. Future work will extend this analysis to a larger sample of merging galaxies and evolution of the stellar populations of such structures across the nearby Universe to unprecedented detail. This project is fully reproducible, through Maneage (commit 0f0d7e2). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_22166 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | J-PAS: unprecedented precision in stellar populations of diffuse tidal features Eskandarlou, Sepideh Akhlaghi, Mohammad Arizo-Borillo, Francisco Knapen, Johan H. Sánchez, Helena Domínguez Fernández-Ontiveros, Juan Antonio López-Sanjuan, Carlos Delgado, Rosa María González Teja, Yolanda Jiménez Dupke, Renato Revaz, Yves Jablonka, Pascale Roca-Fábrega, Santi Miró-Carretero, Juan Martínez-Delgado, David Lumbreras-Calle, Alejandro Hernán-Caballero, Antonio Ramió, Héctor Vázquez Infante-Sainz, Raúl Chies-Santos, Ana L. Ederoclite, Alessandro Martín, Julio Esteban Rodríguez Abramo, Raul Alcaniz, Jailson Benitez, Narciso Bonoli, Silvia Zaragoza, Javier Carneiro, Saulo Cenarro, Javier Cristóbal-Hornillos, David Daflon, Simone Hernández-Monteagudo, Carlos Liu, Jifeng Franch, Antonio Marín de Oliveira, Claudia Mendes Moles, Mariano Roig, Fernando Sodré Jr., Laerte Taylor, Keith Varela, Jesús Vilchez, José Manuel Astrophysics of Galaxies Galaxies frequently interact with nearby systems, a process that can significantly alter their morphology and star formation activity. However, spectroscopic studies of their faint and diffuse remnants require very long exposure times and often exceed the limited field of view of integral field units (IFUs). On the other hand, broad-band imaging can have a much wider field of view, but lacks the spectral resolution to identify key spectral features, restricting accurate constraints on stellar population properties. With its 54 narrow-band filters in the optical and wide coverage (planned 8000 square degrees), J-PAS fills this gap. In this case study, we examine PGC 3087775, a massive galaxy at z = 0.046179 (~ 201 Mpc) in the later stages of a major merger in the J-PAS early data release. Photometry was validated with MaNGA IFU data (for the central part). Stellar population properties was derived using both J-PAS and SDSS photometry. SDSS indicates a metal-rich population with an extended star formation history (SFH) and elevated star formation rates. J-PAS instead points to a less metal-rich population with moderate extinction and a more rapid SFH, consistent with a quenched stellar population. The average Dn(4000) index of the tidal features is 1.24, suggesting that it was a non-dry merger and a fourfold improvement in the precision of stellar mass and Dn (4000) was found with J-PAS. We also assessed two heuristic methods for estimating the mass-to-light ratio from SDSS filters and found that they overestimate the stellar mass in this galaxy by 0.5 dex and 0.4 dex relative to SED fitting results from J-PAS and SDSS, respectively. Future work will extend this analysis to a larger sample of merging galaxies and evolution of the stellar populations of such structures across the nearby Universe to unprecedented detail. This project is fully reproducible, through Maneage (commit 0f0d7e2). |
| title | J-PAS: unprecedented precision in stellar populations of diffuse tidal features |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2603.22166 |