Por favor, use este identificador para citar o enlazar este ítem:
http://rid.unrn.edu.ar/handle/20.500.12049/2871
| Título: | On the relevance of chaos for halo stars in the solar neighbourhood |
| Autor(es): | Maffione, Nicolás Pablo Gómez, F. Cincotta, Pablo Miguel Giordano, Claudia Marcela Cooper, Andrew P. O'Shea, B. |
| Fecha de publicación: | feb-2015 |
| Citación: | Maffione, Nicolas P., Gomez, F., Cincotta, Pablo M., Giordano, Claudia M., Cooper, A. & et al. (2015). On the relevance of chaos for halo stars in the solar neighbourhood. Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 453; 3; 2830-2847 |
| Revista: | Monthly Notices of the Royal Astronomical Society |
| Resumen: | We show that diffusion due to chaotic mixing in the neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse solar neighbourhood-like volumes extracted from cosmological simulations that naturally account for chaotic orbital behaviour induced by the strongly triaxial and cuspy shape of the resulting dark matter haloes, among other factors. In the approximation of an analytical static triaxial model, our results show that a large fraction of stellar halo particles in such local volumes have chaos onset times (i.e. the timescale at which stars commonly associated with chaotic orbits will exhibit their chaotic behaviour) significantly larger than a Hubble time. Furthermore, particles that do present a chaotic behaviour within a Hubble time do not exhibit significant diffusion in phase space. |
| URI: | https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2871 |
| Identificador DOI: | http://dx.doi.org/10.1093/mnras/stv1778 |
| ISSN: | 0035-8711 |
| Otros enlaces: | https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stv1778 http://arxiv.org/abs/1508.00579 http://hdl.handle.net/11336/13886 |
| Aparece en las colecciones: | Artículos |
Archivos en este ítem:
| Archivo | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| On the relevance of chaos for halo stars in the solar neighbourhood.pdf | 3,1 MB | Adobe PDF | Visualizar/Abrir |
Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899
Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional.