Artículo
Simulating cosmological substructure in the solar neighbourhood
Simpson, Christine M.; Gargiulo, Ignacio Daniel
; Gómez, Facundo Ariel; Grand, Robert J. J.; Maffione, Nicolas Pablo
; Cooper, Andrew P.; Deason, Alis J.; Frenk, Carlos; Helly, John; Marinacci, Federico; Pakmor, Rüdiger
Fecha de publicación:
11/2019
Editorial:
Oxford University Press
Revista:
Monthly Notices of the Royal Astronomical Society: Letters
ISSN:
1745-3933
e-ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
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.
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Simpson, Christine M.; Gargiulo, Ignacio Daniel; Gómez, Facundo Ariel; Grand, Robert J. J.; Maffione, Nicolas Pablo; et al.; Simulating cosmological substructure in the solar neighbourhood; Oxford University Press; Monthly Notices of the Royal Astronomical Society: Letters; 490; 1; 11-2019; L32-L37
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