1. Radiative properties of the first galaxies: Rapid transition from blue to red
- Author
-
Kentaro Nagamine, Shohei Arata, Sadegh Khochfar, Yuexing Li, and Hidenobu Yajima
- Subjects
Physics ,Space and Planetary Science ,Computer Science::Information Retrieval ,Radiative transfer ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Astrophysics::Galaxy Astrophysics ,Galaxy - Abstract
Combining cosmological hydrodynamic simulations and radiative transfer (RT) calculations, we present predictions of multi-wavelength radiative properties of the first galaxies at z ∼ 6–5. We find that intermittent star formation due to supernova (SN) feedback causes the escape fraction of UV photons to fluctuate rapidly, which then produces the observed diversity of SEDs for high-z galaxies. The simulated galaxies make rapid transition between UV-bright and IR-bright phase, and our RT calculations suggest that dust temperatures in the first galaxies are higher than z < 3 galaxies with ∼ 60 K.
- Published
- 2019