Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.16116 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909854229069824 |
|---|---|
| author | Fujimoto, Seiji Faisst, Andreas L. Tsujita, Akiyoshi Kohandel, Mahsa Lee, Lilian L. Übler, Hannah Loiacono, Federica Nezhad, Negin Pallottini, Andrea Aravena, Manuel Assef, Roberto J. Battisti, Andrew J. Béthermin, Matthieu Boquien, Médéric da Cunha, Elisabete Ferrara, Andrea Franco, Maximilien Ginolfi, Michele Hadi, Ali Haghjoo, Aryana Herrera-Camus, Rodrigo Inami, Hanae Koekemoer, Anton M. Lemaux, Brian C. Li, Yuan Liu, Lun-Jun Molina, Juan Nanni, Ambra Pozzi, Francesca Relano, Monica Romano, Michael Sanders, David B. Schreiber, Natascha M. Förster Silverman, John Spilker, Justin Telikova, Kseniia Villanueva, Vicente Vallini, Livia Wang, Wuji Zamorani, Giovanni |
| author_facet | Fujimoto, Seiji Faisst, Andreas L. Tsujita, Akiyoshi Kohandel, Mahsa Lee, Lilian L. Übler, Hannah Loiacono, Federica Nezhad, Negin Pallottini, Andrea Aravena, Manuel Assef, Roberto J. Battisti, Andrew J. Béthermin, Matthieu Boquien, Médéric da Cunha, Elisabete Ferrara, Andrea Franco, Maximilien Ginolfi, Michele Hadi, Ali Haghjoo, Aryana Herrera-Camus, Rodrigo Inami, Hanae Koekemoer, Anton M. Lemaux, Brian C. Li, Yuan Liu, Lun-Jun Molina, Juan Nanni, Ambra Pozzi, Francesca Relano, Monica Romano, Michael Sanders, David B. Schreiber, Natascha M. Förster Silverman, John Spilker, Justin Telikova, Kseniia Villanueva, Vicente Vallini, Livia Wang, Wuji Zamorani, Giovanni |
| contents | We present a statistical study of spatially resolved chemical enrichment in 18 main-sequence galaxies at $z=4$--6, observed with \jwst/NIRSpec IFU as part of the ALPINE-CRISTAL-\jwst\ survey. Performing an optimized reduction and calibration procedure, including local background subtraction, light-leakage masking, stripe removal, and astrometry refinement, we achieve robust emission-line mapping on kiloparsec scales. Although line-ratio distributions vary across galaxies in our sample, we generally find mild central enhancements in [O\,\textsc{iii}]/H$β$, [O\,\textsc{ii}]/[O\,\textsc{iii}], [S\,\textsc{ii}]$_{6732}$/[S\,\textsc{ii}]$_{6718}$, H$α$/H$β$, and $L_{\rm Hα}/L_{\rm UV}$, consistent with elevated electron density, dust obscuration, and bursty star formation accompanied by reduced metallicity and ionization parameter. These features point to inside-out growth fueled by recent inflows of pristine gas. Nevertheless, the median metallicity gradient is nearly flat over a few kpc scale, $Δ\log({\rm O/H}) = 0.02 \pm 0.01$ dex kpc$^{-1}$, implying efficient chemical mixing through inflows, outflows, and mergers. From pixel-by-pixel stellar and emission-line characterizations, we further investigate the resolved Fundamental Metallicity Relation (rFMR). Metallicity is described by a fundamental plane with stellar mass and SFR surface densities, but with a stronger dependence on $Σ_{\rm SFR}$ than seen in local galaxies. Our results indicate that the regulatory processes linking star formation, gas flows, and metal enrichment were already vigorous $\sim$1 Gyr after the Big Bang, producing the nearly flat metallicity gradient and a stronger coupling between star formation and metallicity than observed in evolved systems in the local universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16116 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The ALPINE-CRISTAL-JWST Survey: NIRSpec IFU Data Processing and Spatially-resolved Views of Chemical Enrichment in Normal Galaxies at z=4-6 Fujimoto, Seiji Faisst, Andreas L. Tsujita, Akiyoshi Kohandel, Mahsa Lee, Lilian L. Übler, Hannah Loiacono, Federica Nezhad, Negin Pallottini, Andrea Aravena, Manuel Assef, Roberto J. Battisti, Andrew J. Béthermin, Matthieu Boquien, Médéric da Cunha, Elisabete Ferrara, Andrea Franco, Maximilien Ginolfi, Michele Hadi, Ali Haghjoo, Aryana Herrera-Camus, Rodrigo Inami, Hanae Koekemoer, Anton M. Lemaux, Brian C. Li, Yuan Liu, Lun-Jun Molina, Juan Nanni, Ambra Pozzi, Francesca Relano, Monica Romano, Michael Sanders, David B. Schreiber, Natascha M. Förster Silverman, John Spilker, Justin Telikova, Kseniia Villanueva, Vicente Vallini, Livia Wang, Wuji Zamorani, Giovanni Astrophysics of Galaxies We present a statistical study of spatially resolved chemical enrichment in 18 main-sequence galaxies at $z=4$--6, observed with \jwst/NIRSpec IFU as part of the ALPINE-CRISTAL-\jwst\ survey. Performing an optimized reduction and calibration procedure, including local background subtraction, light-leakage masking, stripe removal, and astrometry refinement, we achieve robust emission-line mapping on kiloparsec scales. Although line-ratio distributions vary across galaxies in our sample, we generally find mild central enhancements in [O\,\textsc{iii}]/H$β$, [O\,\textsc{ii}]/[O\,\textsc{iii}], [S\,\textsc{ii}]$_{6732}$/[S\,\textsc{ii}]$_{6718}$, H$α$/H$β$, and $L_{\rm Hα}/L_{\rm UV}$, consistent with elevated electron density, dust obscuration, and bursty star formation accompanied by reduced metallicity and ionization parameter. These features point to inside-out growth fueled by recent inflows of pristine gas. Nevertheless, the median metallicity gradient is nearly flat over a few kpc scale, $Δ\log({\rm O/H}) = 0.02 \pm 0.01$ dex kpc$^{-1}$, implying efficient chemical mixing through inflows, outflows, and mergers. From pixel-by-pixel stellar and emission-line characterizations, we further investigate the resolved Fundamental Metallicity Relation (rFMR). Metallicity is described by a fundamental plane with stellar mass and SFR surface densities, but with a stronger dependence on $Σ_{\rm SFR}$ than seen in local galaxies. Our results indicate that the regulatory processes linking star formation, gas flows, and metal enrichment were already vigorous $\sim$1 Gyr after the Big Bang, producing the nearly flat metallicity gradient and a stronger coupling between star formation and metallicity than observed in evolved systems in the local universe. |
| title | The ALPINE-CRISTAL-JWST Survey: NIRSpec IFU Data Processing and Spatially-resolved Views of Chemical Enrichment in Normal Galaxies at z=4-6 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.16116 |