The dissolution of star clusters and the formation of wide binaries | César Guerra
Автор: Coloquios de Física PUCP
Загружено: 2020-04-16
Просмотров: 468
Coloquio de Física PUCP 16/04/2020
The dissolution of star clusters and the formation of wide binaries
César Guerra
Sección Física PUCP
Wide binaries are ubiquitous in the Galaxy, they are extremely useful for a large variety of astronomical applications, and nowadays we keep learning about their properties and their populations thanks to Gaia’s precision astrometry. How exactly they have formed, however, remains as a relatively unexplored question, and no canonical, widely-accepted formation model really exists yet. In this context, N-body simulations have suggested that they could be formed during the dissolution phase of low-mass star clusters and associations although these models are very simplified regarding the escaping binaries count. In this talk I will present a more realistic approach in which we carefully follow shells of the cluster as it expands, and we consider escaping binaries only in relation to the mean background density of the environment where the clusters sit. Our procedure allows us to identify key aspects of the physics of this formation channel that cannot be followed by more simplified models, thus offering observational insight on how to better understand the formation of these intriguing systems.
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