On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation
Cosmological hydrodynamical simulations are studied in order to analyse generic trends for the stellar, baryonic and halo mass assembly of low-mass galaxies (M* < 3 × 1010M⊙) as a function of their present halo mass, in the context of the λcold dark matter (λCDM) scenario and common subgrid p...
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todo:paper_00358711_v435_n3_p2736_DeRossi2023-10-03T14:47:08Z On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation De Rossi, M.E. Avila-Reese, V. Tissera, P.B. González-Samaniego, A. Pedrosa, S.E. Cosmology: Theory Galaxies: Evolution Galaxies: Haloes Galaxies: Highredshift Galaxies: Star Formation Methods: Numerical Cosmological hydrodynamical simulations are studied in order to analyse generic trends for the stellar, baryonic and halo mass assembly of low-mass galaxies (M* < 3 × 1010M⊙) as a function of their present halo mass, in the context of the λcold dark matter (λCDM) scenario and common subgrid physics schemes.We obtain that smaller galaxies exhibit higher specific star formation rates and higher gas fractions. Although these trends are in rough agreement with observations, the absolute values of these quantities tend to be lower than observed ones since z ~ 2. The simulated galaxy stellar mass fraction increases with halo mass, consistently with semi-empirical inferences. However, the predicted correlation between them shows negligible variations up to high z, while these inferences seem to indicate some evolution. The hot-gas mass in z = 0 haloes is higher than the central galaxy mass by a factor of ~1-1.5 and this factor increases up to ~5-7 at z ~ 2 for the smallest galaxies. The stellar, baryonic and halo evolutionary tracks of simulated galaxies show that smaller galaxies tend to delay their baryonic and stellar mass assembly with respect to the halo one. The supernova feedback treatment included in this model plays a key role on this behaviour albeit the trend is still weaker than the one inferred from observations. At z > 2, the overall properties of simulated galaxies are not in large disagreement with those derived from observations. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Fil:De Rossi, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tissera, P.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pedrosa, S.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v435_n3_p2736_DeRossi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cosmology: Theory Galaxies: Evolution Galaxies: Haloes Galaxies: Highredshift Galaxies: Star Formation Methods: Numerical |
| spellingShingle |
Cosmology: Theory Galaxies: Evolution Galaxies: Haloes Galaxies: Highredshift Galaxies: Star Formation Methods: Numerical De Rossi, M.E. Avila-Reese, V. Tissera, P.B. González-Samaniego, A. Pedrosa, S.E. On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| topic_facet |
Cosmology: Theory Galaxies: Evolution Galaxies: Haloes Galaxies: Highredshift Galaxies: Star Formation Methods: Numerical |
| description |
Cosmological hydrodynamical simulations are studied in order to analyse generic trends for the stellar, baryonic and halo mass assembly of low-mass galaxies (M* < 3 × 1010M⊙) as a function of their present halo mass, in the context of the λcold dark matter (λCDM) scenario and common subgrid physics schemes.We obtain that smaller galaxies exhibit higher specific star formation rates and higher gas fractions. Although these trends are in rough agreement with observations, the absolute values of these quantities tend to be lower than observed ones since z ~ 2. The simulated galaxy stellar mass fraction increases with halo mass, consistently with semi-empirical inferences. However, the predicted correlation between them shows negligible variations up to high z, while these inferences seem to indicate some evolution. The hot-gas mass in z = 0 haloes is higher than the central galaxy mass by a factor of ~1-1.5 and this factor increases up to ~5-7 at z ~ 2 for the smallest galaxies. The stellar, baryonic and halo evolutionary tracks of simulated galaxies show that smaller galaxies tend to delay their baryonic and stellar mass assembly with respect to the halo one. The supernova feedback treatment included in this model plays a key role on this behaviour albeit the trend is still weaker than the one inferred from observations. At z > 2, the overall properties of simulated galaxies are not in large disagreement with those derived from observations. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. |
| format |
JOUR |
| author |
De Rossi, M.E. Avila-Reese, V. Tissera, P.B. González-Samaniego, A. Pedrosa, S.E. |
| author_facet |
De Rossi, M.E. Avila-Reese, V. Tissera, P.B. González-Samaniego, A. Pedrosa, S.E. |
| author_sort |
De Rossi, M.E. |
| title |
On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| title_short |
On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| title_full |
On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| title_fullStr |
On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| title_full_unstemmed |
On the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| title_sort |
on the mass assembly of low-mass galaxies in hydrodynamical simulations of structure formation |
| url |
http://hdl.handle.net/20.500.12110/paper_00358711_v435_n3_p2736_DeRossi |
| work_keys_str_mv |
AT derossime onthemassassemblyoflowmassgalaxiesinhydrodynamicalsimulationsofstructureformation AT avilareesev onthemassassemblyoflowmassgalaxiesinhydrodynamicalsimulationsofstructureformation AT tisserapb onthemassassemblyoflowmassgalaxiesinhydrodynamicalsimulationsofstructureformation AT gonzalezsamaniegoa onthemassassemblyoflowmassgalaxiesinhydrodynamicalsimulationsofstructureformation AT pedrosase onthemassassemblyoflowmassgalaxiesinhydrodynamicalsimulationsofstructureformation |
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1807316063865536512 |