| Texto completo | |
| Autor(es): |
Lanfranchi, Gustavo A.
;
Caproni, Anderson
;
Soares, Jennifer F.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 535, n. 4, p. 17-pg., 2024-12-03. |
| Resumo | |
The absence of neutral gas in Local Group dwarf spheroidal galaxies is a well-known fact. However, the physical mechanism that led to the removal or consumption of their gas remains an unsolved puzzle. It is possible that galactic winds triggered by supernovae or external physical processes such as ram pressure or tidal stripping could have played a significant role in removing a considerable portion of gas from these galaxies. This study utilizes a non-cosmological 3D hydrodynamic simulation code to explore the impact of feedback from Types Ia and II supernovae on the dynamics of the gas of a typical dwarf spheroidal galaxy. The simulation code considers a fixed and cored dark matter potential and a ratio of baryonic to dark matter based on cosmic background radiation, and it takes into account the effects of both Type II and Type Ia supernova feedback. The gas distribution inside the tidal radius of the galaxy is allowed to evolve over 1 billion years considering different prescriptions for the spatial and temporal distribution of the supernovae. Our results suggest that Type Ia supernovae are more effective in expelling the gas out of the galaxy whereas Type II supernovae remove the gas from the central regions of the system. Whereas the spatial distribution of supernovae is more influential on gas loss than their temporal distribution, both factors should be considered in stellar feedback studies. Moreover, both types of supernovae, with their distinct time-scales, should be incorporated into these investigations. (AU) | |
| Processo FAPESP: | 17/25651-5 - Estudos numéricos de objetos extragalácticos no universo local e em altos redshifts |
| Beneficiário: | Anderson Caproni |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/25799-2 - Galáxias Anãs Locais: Dinâmica Interna e Enriquecimento Químico |
| Beneficiário: | Gustavo Amaral Lanfranchi |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/21615-0 - Efeitos das Explosões de Supernovas na Dinâmica do Gás em Galáxias Esferoidais Anãs |
| Beneficiário: | Jennifer Ferreira Soares |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |
| Processo FAPESP: | 14/11156-4 - O que determina o crescimento da massa estelar de galáxias elípticas? Intrínseco ou ambiente: a saga contínua |
| Beneficiário: | Reinaldo Ramos de Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |