Bibcode
Furlong, M.; Bower, R. G.; Theuns, T.; Schaye, J.; Crain, R. A.; Schaller, M.; Dalla Vecchia, C.; Frenk, C. S.; McCarthy, I. G.; Helly, J.; Jenkins, A.; Rosas-Guevara, Y. M.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 450, Issue 4, p.4486-4504
Fecha de publicación:
7
2015
Número de citas
376
Número de citas referidas
364
Descripción
We investigate the evolution of galaxy masses and star formation rates
in the Evolution and Assembly of Galaxies and their Environment (EAGLE)
simulations. These comprise a suite of hydrodynamical simulations in a
Λ cold dark matter cosmogony with subgrid models for radiative
cooling, star formation, stellar mass-loss and feedback from stars and
accreting black holes. The subgrid feedback was calibrated to reproduce
the observed present-day galaxy stellar mass function and galaxy sizes.
Here, we demonstrate that the simulations reproduce the observed growth
of the stellar mass density to within 20 per cent. The simulations also
track the observed evolution of the galaxy stellar mass function out to
redshift z = 7, with differences comparable to the plausible
uncertainties in the interpretation of the data. Just as with observed
galaxies, the specific star formation rates of simulated galaxies are
bimodal, with distinct star forming and passive sequences. The specific
star formation rates of star-forming galaxies are typically 0.2 to 0.5
dex lower than observed, but the evolution of the rates track the
observations closely. The unprecedented level of agreement between
simulation and data across cosmic time makes EAGLE a powerful resource
to understand the physical processes that govern galaxy formation.
Proyectos relacionados
Astrofísica Numérica: Formación y Evolución de Galaxias
Entre las cuestiones fundamentales en Astronomía y Astrofísica están la formación y evolución de galaxias. Las escalas de tiempo y tamaño son tan astronómicas que su observación en galaxias individuales es imposible. Solo con el uso de simulaciones numéricas es posible entender la formación de estructuras cósmicas dentro del actual marco
Claudio
Dalla Vecchia