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| Главные авторы: | , , , , , , , , , , |
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| Формат: | Preprint |
| Опубликовано: |
2024
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| Online-ссылка: | https://arxiv.org/abs/2402.05721 |
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| author | De Somma, Giulia Marconi, Marcella Cassisi, Santi Molinaro, Roberto Bhardwaj, Anupam Ripepi, Vincenzo Musella, Ilaria Pietrinferni, Adriano Sicignano, Teresa Trentin, Erasmo Leccia, Silvio |
| author_facet | De Somma, Giulia Marconi, Marcella Cassisi, Santi Molinaro, Roberto Bhardwaj, Anupam Ripepi, Vincenzo Musella, Ilaria Pietrinferni, Adriano Sicignano, Teresa Trentin, Erasmo Leccia, Silvio |
| contents | Homogeneous multi-wavelength observations of classical Cepheids from the forthcoming Rubin-LSST have the potential to significantly contribute to our understanding of the evolutionary and pulsation properties of these pulsating stars. Updated pulsation models for Classical Cepheid stars have been computed under various assumptions about chemical compositions, including relatively low metallicity ($Z$ = $0.004$ with $Y$ =$0.25$ and $Z$=$0.008$ with $Y$ =$0.25$), solar metallicity ($Z$=$0.02$ with $Y$=$0.28$), and supersolar metallicity environments ($Z$ = $0.03$ with $Y$ = $0.28$).
From the predicted periods, intensity-weighted mean magnitudes, and colors, we have derived the first theoretical pulsation relations in the Rubin-LSST filters (ugrizy), including period-luminosity-color, period-Wesenheit, and period-age-color relations. We find that the coefficients of these relations are almost insensitive to the efficiency of superadiabatic convection but are significantly affected by the assumption of the mass-luminosity relation and the adopted chemical composition. Metal-dependent versions of these relations are also derived, representing valuable tools for individual distance determinations and correction for metallicity effects on the cosmic distance scale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_05721 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Classical Cepheid Pulsation properties in the Rubin-LSST filters De Somma, Giulia Marconi, Marcella Cassisi, Santi Molinaro, Roberto Bhardwaj, Anupam Ripepi, Vincenzo Musella, Ilaria Pietrinferni, Adriano Sicignano, Teresa Trentin, Erasmo Leccia, Silvio Solar and Stellar Astrophysics Homogeneous multi-wavelength observations of classical Cepheids from the forthcoming Rubin-LSST have the potential to significantly contribute to our understanding of the evolutionary and pulsation properties of these pulsating stars. Updated pulsation models for Classical Cepheid stars have been computed under various assumptions about chemical compositions, including relatively low metallicity ($Z$ = $0.004$ with $Y$ =$0.25$ and $Z$=$0.008$ with $Y$ =$0.25$), solar metallicity ($Z$=$0.02$ with $Y$=$0.28$), and supersolar metallicity environments ($Z$ = $0.03$ with $Y$ = $0.28$). From the predicted periods, intensity-weighted mean magnitudes, and colors, we have derived the first theoretical pulsation relations in the Rubin-LSST filters (ugrizy), including period-luminosity-color, period-Wesenheit, and period-age-color relations. We find that the coefficients of these relations are almost insensitive to the efficiency of superadiabatic convection but are significantly affected by the assumption of the mass-luminosity relation and the adopted chemical composition. Metal-dependent versions of these relations are also derived, representing valuable tools for individual distance determinations and correction for metallicity effects on the cosmic distance scale. |
| title | Classical Cepheid Pulsation properties in the Rubin-LSST filters |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2402.05721 |