Bibcode
Walo-Martín, D.; Falcón-Barroso, J.; Dalla Vecchia, C.; Pérez, I.; Negri, A.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society
Advertised on:
5
2020
Citations
21
Refereed citations
21
Description
We have developed a new tool to analyse galaxies in the eagle simulations as close as possible to observations. We investigated the evolution of their kinematic properties by means of the angular momentum proxy parameter, λRe, for galaxies with M⋆ ≥ 5 × 109 M☉ in the RefL0100N1504 simulation up to redshift two (z = 2). Galaxies in the simulation show a wide variety of kinematic features, similiar to those found in integral-field spectroscopic studies. At z = 0 the distribution of galaxies in the λRe-∊ plane is also in good agreement with results from observations. Scaling relations at z = 0 indicate that there is a critical mass, Mcrit /M☉ = 1010.3, that divides two different regimes when we include the λRe parameter. The simulation shows that the distribution of galaxies in the λRe-∊ plane evolves with time until z = 2 when galaxies are equally distributed in both λRe and ∊. We studied the evolution of λRe with time and found that there is no connection between the angular momentum at z = 2 and z = 0. All systems reach their maximum λRe at z = 1 and then steadily lose angular momentum regardless of their merger history, except for the high star-forming systems that sustain that maximum value over time. The evolution of λRe in galaxies that have not experienced any merger in the last 10 Gyr can be explained by their level of gas accretion.
Related projects
Numerical Astrophysics: Galaxy Formation and Evolution
How galaxies formed and evolved through cosmic time is one of the key questions of modern astronomy and astrophysics. Cosmological time- and length-scales are so large that the evolution of individual galaxies cannot be directly observed. Only through numerical simulations can one follow the emergence of cosmic structures within the current
Claudio
Dalla Vecchia
Traces of Galaxy Formation: Stellar populations, Dynamics and Morphology
We are a large, diverse, and very active research group aiming to provide a comprehensive picture for the formation of galaxies in the Universe. Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe.
Ignacio
Martín Navarro