Fundamental physics with ESPRESSO: a new determination of the D/H ratio towards PKS1937-101
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Guarneri, Francesco Pasquini, Luca D'Odorico, Valentina Cristiani, Stefano Cupani, Guido Di Marcantonio, Paolo Hernández, J. I. González Martins, C. J. A. P. Mascareño, Alejandro Suárez Milaković, Dinko Molaro, Paolo Murphy, Michael T. Nunes, Nelson J. Palle, Enric Pepe, Francesco Rebolo, Rafael Santos, Nuno C. Santos, Ricardo Génova Schmidt, Tobias M. Sousa, Sérgio G. Sozzetti, Alessandro Trost, Andrea |
| author_facet | Guarneri, Francesco Pasquini, Luca D'Odorico, Valentina Cristiani, Stefano Cupani, Guido Di Marcantonio, Paolo Hernández, J. I. González Martins, C. J. A. P. Mascareño, Alejandro Suárez Milaković, Dinko Molaro, Paolo Murphy, Michael T. Nunes, Nelson J. Palle, Enric Pepe, Francesco Rebolo, Rafael Santos, Nuno C. Santos, Ricardo Génova Schmidt, Tobias M. Sousa, Sérgio G. Sozzetti, Alessandro Trost, Andrea |
| contents | Primordial abundances of light elements are sensitive to the physics of the early Universe and can directly constrain cosmological quantities, such as the baryon-to-photon ratio $η_{10}$, the baryon density and the number of neutrino families. Deuterium is especially suited for these studies: its primordial abundance is sensitive and monotonically dependent on $η_{10}$, allowing an independent measurement of the cosmic baryon density that can be compared, for instance, against the Planck satellite data. The primordial deuterium abundance can be measured in high $H_I$ column density absorption systems towards distant quasars. We report here a new measurement, based on high-resolution ESPRESSO data, of the primordial $D_I$ abundance of a system at redshift $z \sim 3.572$, towards PKS1937-101. Using only ESPRESSO data, we find a D/H ratio of $2.638\pm0.128 \times 10^{-5}$, while including the available UVES data improves the precision, leading to a ratio of $2.608 \pm 0.102 \times 10^{-5}$. The results of this analysis agree with those of the most precise existing measurements. We find that the relatively low column density of this system ($\log{N_{\rm H_I}/ {\rm cm}^{-2}}\sim18 $) introduces modelling uncertainties, which become the main contributor to the error budget. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_05586 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fundamental physics with ESPRESSO: a new determination of the D/H ratio towards PKS1937-101 Guarneri, Francesco Pasquini, Luca D'Odorico, Valentina Cristiani, Stefano Cupani, Guido Di Marcantonio, Paolo Hernández, J. I. González Martins, C. J. A. P. Mascareño, Alejandro Suárez Milaković, Dinko Molaro, Paolo Murphy, Michael T. Nunes, Nelson J. Palle, Enric Pepe, Francesco Rebolo, Rafael Santos, Nuno C. Santos, Ricardo Génova Schmidt, Tobias M. Sousa, Sérgio G. Sozzetti, Alessandro Trost, Andrea Cosmology and Nongalactic Astrophysics Primordial abundances of light elements are sensitive to the physics of the early Universe and can directly constrain cosmological quantities, such as the baryon-to-photon ratio $η_{10}$, the baryon density and the number of neutrino families. Deuterium is especially suited for these studies: its primordial abundance is sensitive and monotonically dependent on $η_{10}$, allowing an independent measurement of the cosmic baryon density that can be compared, for instance, against the Planck satellite data. The primordial deuterium abundance can be measured in high $H_I$ column density absorption systems towards distant quasars. We report here a new measurement, based on high-resolution ESPRESSO data, of the primordial $D_I$ abundance of a system at redshift $z \sim 3.572$, towards PKS1937-101. Using only ESPRESSO data, we find a D/H ratio of $2.638\pm0.128 \times 10^{-5}$, while including the available UVES data improves the precision, leading to a ratio of $2.608 \pm 0.102 \times 10^{-5}$. The results of this analysis agree with those of the most precise existing measurements. We find that the relatively low column density of this system ($\log{N_{\rm H_I}/ {\rm cm}^{-2}}\sim18 $) introduces modelling uncertainties, which become the main contributor to the error budget. |
| title | Fundamental physics with ESPRESSO: a new determination of the D/H ratio towards PKS1937-101 |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.05586 |