The Villafranca project: Combining Gaia and ground-based surveys to study Galactic OB groups
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910631916994560 |
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| author | Apellániz, J. Maíz Barbá, R. H. Lera, J. A. Molina Martínez, A. Lambarri Aranda, R. Fernández |
| author_facet | Apellániz, J. Maíz Barbá, R. H. Lera, J. A. Molina Martínez, A. Lambarri Aranda, R. Fernández |
| contents | The Villafranca project is studying Galactic stellar groups with OB stars combining information from $Gaia$ and ground-based surveys. We summarize the status of the project and we present its most important results. The Villafranca project has been used to produce a new astrometric calibration for $Gaia$ (E)DR3, which improves the previous one significantly for bright stars. We have discovered that dynamical interactions among massive stars at a very young age ($\sim$1 Ma or less) can play a significant interaction in the dynamical evolution of clusters. As a consequence, our current view of the massive-star IMF may be distorted and the number of free-floating neutron stars and black holes higher than previously considered. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21399 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Villafranca project: Combining Gaia and ground-based surveys to study Galactic OB groups Apellániz, J. Maíz Barbá, R. H. Lera, J. A. Molina Martínez, A. Lambarri Aranda, R. Fernández Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics The Villafranca project is studying Galactic stellar groups with OB stars combining information from $Gaia$ and ground-based surveys. We summarize the status of the project and we present its most important results. The Villafranca project has been used to produce a new astrometric calibration for $Gaia$ (E)DR3, which improves the previous one significantly for bright stars. We have discovered that dynamical interactions among massive stars at a very young age ($\sim$1 Ma or less) can play a significant interaction in the dynamical evolution of clusters. As a consequence, our current view of the massive-star IMF may be distorted and the number of free-floating neutron stars and black holes higher than previously considered. |
| title | The Villafranca project: Combining Gaia and ground-based surveys to study Galactic OB groups |
| topic | Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2407.21399 |