Radiative properties of the first galaxies: Rapid transition from blue to red. Issue Volume 15:Issue S341(2019) (November 2019)

• Record Type: Journal Article
• Authors: Arata, Shohei; Yajima, Hidenobu; Nagamine, Kentaro; Li, Yuexing; Khochfar, Sadegh
• Editors: Boquien, Médéric; Lusso, Elisabeta; Gruppioni, Carlotta; Tissera, Patricia
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S341(2019)
• Page Start: 261
• Page End: 263
• Publication Date: 2019-11
• Subjects: galaxies: formation, -- galaxies: high-redshift, -- methods: numerical, -- radiative transfer; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319003004
• Languages: English
• ISSNs: 1743-9213

Abstract

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.