A possible formation scenario for dwarf spheroidal galaxies - III. Adding star formation histories to the fiducial model
arXiv:1710.06696 · doi:10.1093/mnras/stx2712
Abstract
Dwarf spheroidal galaxies are regarded as the basic building blocks in the formation of larger galaxies and are believed to be the most dark matter dominated systems known in the Universe. There are several models that attempt to explain their formation and evolution, but they have problems to model the formation of isolated dwarf spheroidal galaxies. Here, we will explain a possible formation scenario in which star clusters form inside the dark matter halo of a dwarf spheroidal galaxy. Those star clusters suffer from low star formation efficiency and dissolve while orbiting inside the dark matter halo. Thereby, they build the faint luminous components that we observe in dwarf spheroidal galaxies. In this paper we study this model by adding different star formation histories to the simulations to compare the results with our previous work and observational data to show that we can explain the formation of dwarf spheroidal galaxies.
12 pages, 7 figures, accepted for publication by MNRAS
References in corpus (9)
- The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem
- Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
- The Star Formation Histories of Local Group Dwarf Galaxies I. Hubble Space Telescope / Wide Field Planetary Camera 2 Observations
- Velocity Dispersion Profiles of Seven Dwarf Spheroidal Galaxies
- Exploring Halo Substructure with Giant Stars XI: The Tidal Tails of the Carina Dwarf Spheroidal and the Discovery of Magellanic Cloud Stars in the Carina Foreground
- The mass and velocity anisotropy of the Carina, Fornax, Sculptor and Sextans dwarf spheroidal galaxies
- A spectroscopic confirmation of the Bootes II dwarf spheroidal
- The shape of the initial cluster mass function: what it tells us about the local star formation efficiency
- Deadly dark matter cusps vs faint and extended star clusters: Eridanus II and Andromeda XXV