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Título: Simulating cosmological substructure in the solar neighbourhood
Autor(es): Simpson, Christine M.
Gargiulo, Ignacio
Gómez, Facundo A.
Grand, Robert J.
Maffione, Nicolás P.
Cooper, Andrew P.
Deason, Alis J.
Frenk, Carlos
Helly, John
Marinacci, Federico
Pakmor, Rudiger
Fecha de publicación: sep-2019
Editorial: Oxford University Press
Citación: Simpson, Christine M., Gargiulo, Ignacio., Gómez, Facundo A., Grand, Robert J., Maffione, Nicolás P. y et al. (2019). Simulating cosmological substructure in the solar neighbourhood. Oxford University Press; Monthly Notices of the Royal Astronomical Society: Letters; 490 (1); L32-L37
Revista: Monthly Notices of the Royal Astronomical Society: Letters
Resumen: We explore the predictive power of cosmological, hydrodynamical simulations for stellar phase-space substructure and velocity correlations with the AURIGA simulations and AURIGAIA mock Gaia catalogues. We show that at the solar circle the AURIGA simulations commonly host phase-space structures in the stellar component that have constant orbital energies and arise from accreted subhaloes. These structures can persist for a few Gyr, even after coherent streams in position space have been erased. We also explore velocity two-point correlation functions and find this diagnostic is not deterministic for particular clustering patterns in phase space. Finally, we explore these structure diagnostics with the AURIGAIA catalogues and show that current catalogues have the ability to recover some structures in phase space but careful consideration is required to separate physical structures from numerical structures arising from catalogue generation methods.
URI: https://rid.unrn.edu.ar/jspui/handle/20.500.12049/3767
Identificador DOI: https://doi.org/10.1093/mnrasl/slz142
ISSN: 1745-3933
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Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899