MARTA: Temperature-temperature relationships and strong-line metallicity calibrations from multiple auroral-line detections at cosmic noon
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Cataldi, E. Belfiore, F. Curti, M. Moreschini, B. Mannucci, F. D'Amato, Q. Cresci, G. Feltre, A. Ginolfi, M. Marconi, A. Amiri, A. Arnaboldi, M. Bertola, E. Bracci, C. Carniani, S. Ceci, M. Chakraborty, A. Cirasuolo, M. Cullen, F. Kobayashi, C. Kumari, N. Maiolino, R. Marconcini, C. Scialpi, M. Ulivi, L. |
| author_facet | Cataldi, E. Belfiore, F. Curti, M. Moreschini, B. Mannucci, F. D'Amato, Q. Cresci, G. Feltre, A. Ginolfi, M. Marconi, A. Amiri, A. Arnaboldi, M. Bertola, E. Bracci, C. Carniani, S. Ceci, M. Chakraborty, A. Cirasuolo, M. Cullen, F. Kobayashi, C. Kumari, N. Maiolino, R. Marconcini, C. Scialpi, M. Ulivi, L. |
| contents | We present the first results from MARTA (Measuring Abundances at high Redshift with the T$_e$ Approach), a programme leveraging ultra-deep, medium-resolution JWST/NIRSpec spectroscopy to probe the interstellar medium (ISM) of star-forming galaxies at $z \sim 2 - 3$. We report detections of one or more auroral lines, including [O III]$\lambda4363$, [O II]$λ\lambda7320,7330$, [S II] $\lambda4068$, and [S III] $\lambda6312$ for 16 galaxies in the sample, providing measurements of multiple ionic temperatures. We tested the validity of the T[O II]-T[O III] relation at high redshift considering a total sample of 21 objects including literature data, and obtained a shallower slope than in the low-$z$ literature. However, such a slope is consistent with low-redshift data when ultra-low metallicity objects are considered. We assessed the correlation of the T[O II]-T[O III] relationship and its scatter on different physical parameters, finding a mild correlation with the ionisation parameter and radiation field hardness, while no significant correlation with gas density. The location of high-redshift data is also consistent with the low-$z$ literature in the T[O II]-T[S II], and T[S III]-T[O III] relations, although this conclusion is limited with low-number statistics. Finally, we leveraged our sample together with a comprehensive compilation of galaxies with [O III]$\lambda4363$ detections from the literature to recalibrate classical strong-line diagnostics at high redshift. MARTA represents a key addition in this space because it provides direct metallicities at moderately high oxygen abundances (12+log(O/H) $\sim8.0-8.4$). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03839 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | MARTA: Temperature-temperature relationships and strong-line metallicity calibrations from multiple auroral-line detections at cosmic noon Cataldi, E. Belfiore, F. Curti, M. Moreschini, B. Mannucci, F. D'Amato, Q. Cresci, G. Feltre, A. Ginolfi, M. Marconi, A. Amiri, A. Arnaboldi, M. Bertola, E. Bracci, C. Carniani, S. Ceci, M. Chakraborty, A. Cirasuolo, M. Cullen, F. Kobayashi, C. Kumari, N. Maiolino, R. Marconcini, C. Scialpi, M. Ulivi, L. Astrophysics of Galaxies We present the first results from MARTA (Measuring Abundances at high Redshift with the T$_e$ Approach), a programme leveraging ultra-deep, medium-resolution JWST/NIRSpec spectroscopy to probe the interstellar medium (ISM) of star-forming galaxies at $z \sim 2 - 3$. We report detections of one or more auroral lines, including [O III]$\lambda4363$, [O II]$λ\lambda7320,7330$, [S II] $\lambda4068$, and [S III] $\lambda6312$ for 16 galaxies in the sample, providing measurements of multiple ionic temperatures. We tested the validity of the T[O II]-T[O III] relation at high redshift considering a total sample of 21 objects including literature data, and obtained a shallower slope than in the low-$z$ literature. However, such a slope is consistent with low-redshift data when ultra-low metallicity objects are considered. We assessed the correlation of the T[O II]-T[O III] relationship and its scatter on different physical parameters, finding a mild correlation with the ionisation parameter and radiation field hardness, while no significant correlation with gas density. The location of high-redshift data is also consistent with the low-$z$ literature in the T[O II]-T[S II], and T[S III]-T[O III] relations, although this conclusion is limited with low-number statistics. Finally, we leveraged our sample together with a comprehensive compilation of galaxies with [O III]$\lambda4363$ detections from the literature to recalibrate classical strong-line diagnostics at high redshift. MARTA represents a key addition in this space because it provides direct metallicities at moderately high oxygen abundances (12+log(O/H) $\sim8.0-8.4$). |
| title | MARTA: Temperature-temperature relationships and strong-line metallicity calibrations from multiple auroral-line detections at cosmic noon |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2504.03839 |