Buscar
Mostrando ítems 21-30 de 392
Effects of supernova feedback on the formation of galaxy discs
(Wiley Blackwell Publishing, Inc, 2008-09)
We use cosmological simulations in order to study the effects of supernova (SN) feedback on the formation of a Milky Way-type galaxy of virial mass ∼1012 h−1 M. We analyse a set of simulations run with the code described ...
Mild evolution of the stellar metallicity gradients of disc galaxies
(2017)
Context. The metallicity gradients of the stellar populations in disc galaxies and their evolution store relevant information on the disc formation history and on those processes which could mix stars a posteriori, such ...
The effects of mergers on the formation of disc-bulge systems in hierarchical clustering scenarios
(Oxford University Press, 2003-02)
We study the effects of mergers on the structural properties of disc-like systems by using smooth particle hydrodynamical (SPH) numerical simulations in hierarchical clustering scenarios. In order to assess the effects of ...
Yule-Simpson's paradox in galactic archaeology
(Wiley Blackwell Publishing, Inc, 2019-05)
Simpson's paradox, or Yule-Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this phenomenon for chemo-kinematical ...
The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903’s bulge, bar, and outer disc
(Oxford University Press, 2020)
We study the stellar populations and assembly of the nearby spiral galaxy NGC 2903's bulge, bar, and outer disc using the VIRUS-P Exploration of Nearby Galaxies IFS survey. We observe NGC 2903 with a spatial resolution of ...
The mass-size plane of EAGLE galaxies
(EDP Sciences, 2019-08)
Context. Current observational results show that both late- and early-type galaxies follow tight mass–size planes on which physical properties such as age, velocity dispersion, and metallicity correlate with the scatter ...
The spiral structure of the Galaxy revealed by CS sources and evidence for the 4:1 resonance
(WILEY-BLACKWELL, 2011)
We present a map of the spiral structure of the Galaxy, as traced by molecular carbon monosulphide (CS) emission associated with IRAS sources which are believed to be compact H II regions. The CS line velocities are used ...
Hydrodynamical simulations of Galactic fountains - I. Evolution of single fountains
(WILEY-BLACKWELL, 2008)
The ejection of the gas out of the disc in late-type galaxies is related to star formation and is due mainly to Type II supernovae. In this paper, we studied in detail the development of the Galactic fountains in order to ...
Assembly of spheroid-dominated galaxies in the EAGLE simulation
(Astronomy and Astrophysics, 2019)
Context: Despite the insights gained in the last few years, our knowledge about the formation and evolution scenario for the spheroid-dominated galaxies is still incomplete. New and more powerful cosmological simulations ...