Gas removal in the Ursa Minor galaxy: linking hydrodynamics and chemical evolution models

• Grant number: 17/03173-4
• Support Opportunities: Regular Research Grants - Publications - Scientific article
• Duration: April 01, 2017 - September 30, 2017
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
• Principal Investigator: Anderson Caproni
• Grantee: Anderson Caproni
• Host Institution: Pró-Reitoria de Pós-Graduação e Pesquisa. Universidade Cruzeiro do Sul (UNICSUL). São Paulo , SP, Brazil
• Associated research grant: 14/11156-4 - What drives the stellar mass growth of Early-Type galaxies? Born or made: the saga continues, AP.TEM

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 in the literature, 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 which 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)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CAPRONI, ANDERSON; LANFRANCHI, GUSTAVO A.; CAMPOS BAIAO, GABRIEL H.; KOWAL, GRZEGORZ; FALCETA-GONCALVES, DIEGO; MCQUINN, KBW; STIERWALT, S. The hydrodynamic evolution of the gas content in the dSph galaxy Ursa Minor induced by the feedback from types Ia and II supernovae. DWARF GALAXIES: FROM THE DEEP UNIVERSE TO THE PRESENT, v. 14, n. S344, p. 4-pg., 2019-01-01. (14/11156-4, 17/25651-5, 17/03173-4, 09/54006-4)

LANFRANCHI, GUSTAVO A.; HAZENFRATZ, ROBERTO; CAPRONI, ANDERSON; SILK, JOSEPH. Parameterizing the Outflow from a Central Black Hole in Dwarf Spheroidal Galaxies: A 3D Hydrodynamic Simulation. ASTROPHYSICAL JOURNAL, v. 914, n. 1, JUN 2021. (17/03173-4, 17/25651-5, 14/11156-4)