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A new galaxy Spectral Energy Distribution model with the evolution of dust consistent with chemical evolution

Published online by Cambridge University Press:  10 June 2020

Kazuki Y. Nishida
Nagoya University, Japan
Tsutomu T. Takeuchi
Nagoya University, Japan
Takuma Nagata
Nagoya University, Japan
Ryosuke S. Asano
Nagoya University, Japan
Akio K. Inoue
Osaka Sangyo University, Japan Waseda University, Japan
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The spectral energy distribution (SED) model should treat the evolution of a galaxy from its birth. Dust in galaxies affects the formation and evolution of galaxies in various ways. For example, dust grains scatter and absorb stellar emitted ultraviolet (UV) photons and re-emit the radiation at infrared (IR) wavelengths. In this work, we construct a galaxy SED model based on our dust evolution model (Asano et al. 2013a,b, 2014) with a rigorous treatment of the chemical evolution. To reduce the computational cost, we adopt mega-grain approximation (MGA; (MGA; Inoue, 2005). MGA regards a high density dusty region as a huge size (10 pc) dust grain for calculating dust scattering. In this approximation, we can solve the radiative transfer easily and provide SEDs and attenuation curves of galaxies. This model can be used to fit any galaxy in the wavelength range of 10 nm-3 mm.

Contributed Papers
© International Astronomical Union 2020


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