| Full text | |
| Author(s): |
Caproni, Anderson
;
Lanfranchi, Gustavo Amaral
;
Campos Baio, Gabriel Henrique
;
Kowal, Grzegorz
;
Falceta-Goncalves, Diego
Total Authors: 5
|
| Document type: | Journal article |
| Source: | ASTROPHYSICAL JOURNAL; v. 838, n. 2 APR 1 2017. |
| Web of Science Citations: | 3 |
| Abstract | |
We present results from a non-cosmological, three-dimensional hydrodynamical simulation of the gas in the dwarf spheroidal galaxy Ursa Minor. Assuming an initial baryonic-to-dark-matter ratio derived from the cosmic microwave background radiation, we evolved the galactic gas distribution over 3 Gyr, taking into account the effects of the types Ia and II supernovae. For the first time, we used in our simulation the instantaneous supernovae rates derived from a chemical evolution model applied to spectroscopic observational data of Ursa Minor. We show that the amount of gas that is lost in this process is variable with time and radius, being the highest rates observed during the initial 600 Myr in our simulation. Our results indicate that types Ia and II supernovae must be essential drivers of the gas loss in Ursa Minor galaxy (and probably in other similar dwarf galaxies), but it is ultimately the combination of galactic winds powered by these supernovae and environmental effects (e. g., ram-pressure stripping) that results in the complete removal of the gas content. (AU) | |
| FAPESP's process: | 13/04073-2 - Magnetic reconnection and related processes in collisional and collisionless astrophysical plasmas: from solar flares to extragalactic sources |
| Grantee: | Grzegorz Kowal |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 14/11156-4 - What drives the stellar mass growth of Early-Type galaxies? Born or made: the saga continues |
| Grantee: | Reinaldo Ramos de Carvalho |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center |
| Grantee: | Elisabete Maria de Gouveia Dal Pino |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 13/10559-5 - Investigation of high energy and plasma astrophysics phenomena: theory, numerical simulations, observations, and instrument development for the Cherenkov Telescope Array (CTA) |
| Grantee: | Elisabete Maria de Gouveia Dal Pino |
| Support Opportunities: | Special Projects |