Constraining the physical properties of gas in high-z galaxies with far-infrared and submillimetre line ratios
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929422683078656 |
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| author | Schimek, Alice Cicone, Claudia Shen, Sijing Decataldo, Davide Klaassen, Pamela Mayer, Lucio |
| author_facet | Schimek, Alice Cicone, Claudia Shen, Sijing Decataldo, Davide Klaassen, Pamela Mayer, Lucio |
| contents | Optical emission line diagnostics, which are a common tool to constrain the properties of the interstellar medium (ISM) of galaxies, become progressively inaccessible at higher redshifts for ground-based facilities. Far-infrared (FIR) emission lines, which are redshifted into atmospheric windows accessible by ground-based sub-millimeter facilities, could provide alternative ISM diagnostics to optical emission lines. We investigate FIR line ratios involving [CII]$λ158 μ$m, [OIII]$λ88 μ$m, [OIII]$λ52 μ$m, [NII]$λ122 μ$m and [NIII$λ57 μ$m, using synthetic emission lines applied to a high-resolution (m$_{\rm gas}$= 883.4 M$_{\odot}$) cosmological zoom-in simulation, including radiative-transfer post processing with KramsesRT at z = 6.5. We find that the [CII]/[NII]122 ratio is sensitive to the temperature and density of photo-dissociation regions, and thus could be a useful tool to trace the properties of this gas phase in galaxies. We also find that [NII]/[NIII] is a good tracer of the temperature and [OIII]52/[OIII]88 a good tracer of the gas density of HII regions. Emission line ratios containing the [OIII]$λ88 μ$m line are sensitive to high velocity outflowing gas. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_11559 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Constraining the physical properties of gas in high-z galaxies with far-infrared and submillimetre line ratios Schimek, Alice Cicone, Claudia Shen, Sijing Decataldo, Davide Klaassen, Pamela Mayer, Lucio Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Optical emission line diagnostics, which are a common tool to constrain the properties of the interstellar medium (ISM) of galaxies, become progressively inaccessible at higher redshifts for ground-based facilities. Far-infrared (FIR) emission lines, which are redshifted into atmospheric windows accessible by ground-based sub-millimeter facilities, could provide alternative ISM diagnostics to optical emission lines. We investigate FIR line ratios involving [CII]$λ158 μ$m, [OIII]$λ88 μ$m, [OIII]$λ52 μ$m, [NII]$λ122 μ$m and [NIII$λ57 μ$m, using synthetic emission lines applied to a high-resolution (m$_{\rm gas}$= 883.4 M$_{\odot}$) cosmological zoom-in simulation, including radiative-transfer post processing with KramsesRT at z = 6.5. We find that the [CII]/[NII]122 ratio is sensitive to the temperature and density of photo-dissociation regions, and thus could be a useful tool to trace the properties of this gas phase in galaxies. We also find that [NII]/[NIII] is a good tracer of the temperature and [OIII]52/[OIII]88 a good tracer of the gas density of HII regions. Emission line ratios containing the [OIII]$λ88 μ$m line are sensitive to high velocity outflowing gas. |
| title | Constraining the physical properties of gas in high-z galaxies with far-infrared and submillimetre line ratios |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2406.11559 |