The Variation of the Galaxy-Wide IMF for Low-Mass Stars: Modeling and Observational Insights
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917676954157056 |
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| author | Yan, Zhiqiang Li, Jiadong Kroupa, Pavel Jerabkova, Tereza Gjergo, Eda Zhang, Zhi-Yu |
| author_facet | Yan, Zhiqiang Li, Jiadong Kroupa, Pavel Jerabkova, Tereza Gjergo, Eda Zhang, Zhi-Yu |
| contents | The Stellar Initial Mass Function (IMF) characterizes the mass distribution of newly formed stars in various cosmic environments, serving as a fundamental assumption in astrophysical research. Recent findings challenge the prevalent notion of a universal and static IMF, proposing instead that the IMF's shape is contingent upon the star formation environment. In this study, we analyze the galaxy-wide variation of the IMF for low-mass stars in both dwarf and massive galaxies with diverse observational methods. Despite systematic discrepancies between different approaches, an IMF model with a metallicity-dependent slope for the low-mass stars aligns with the majority of observations, indicating a high degree of uniformity in the star formation processes across the universe. We also emphasize the need for a more comprehensive understanding of the variation of the low-mass IMF, considering measurement biases and factors beyond metallicity. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_05308 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Variation of the Galaxy-Wide IMF for Low-Mass Stars: Modeling and Observational Insights Yan, Zhiqiang Li, Jiadong Kroupa, Pavel Jerabkova, Tereza Gjergo, Eda Zhang, Zhi-Yu Astrophysics of Galaxies Solar and Stellar Astrophysics The Stellar Initial Mass Function (IMF) characterizes the mass distribution of newly formed stars in various cosmic environments, serving as a fundamental assumption in astrophysical research. Recent findings challenge the prevalent notion of a universal and static IMF, proposing instead that the IMF's shape is contingent upon the star formation environment. In this study, we analyze the galaxy-wide variation of the IMF for low-mass stars in both dwarf and massive galaxies with diverse observational methods. Despite systematic discrepancies between different approaches, an IMF model with a metallicity-dependent slope for the low-mass stars aligns with the majority of observations, indicating a high degree of uniformity in the star formation processes across the universe. We also emphasize the need for a more comprehensive understanding of the variation of the low-mass IMF, considering measurement biases and factors beyond metallicity. |
| title | The Variation of the Galaxy-Wide IMF for Low-Mass Stars: Modeling and Observational Insights |
| topic | Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2405.05308 |