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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 ,
Tsutomu T. Takeuchi ,
Takuma Nagata ,
Ryosuke S. Asano  and
Akio K. Inoue
Kazuki Y. Nishida
Affiliation:
Nagoya University, Japan
Tsutomu T. Takeuchi
Affiliation:
Nagoya University, Japan
Takuma Nagata
Affiliation:
Nagoya University, Japan
Ryosuke S. Asano
Affiliation:
Nagoya University, Japan
Akio K. Inoue
Affiliation:
Osaka Sangyo University, Japan Waseda University, Japan
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Abstract

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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.

Keywords

Panchromatic codes and modeling techniques
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S341: Challenges in Panchromatic Modelling with Next Generation Facilities , November 2019 , pp. 152 - 156
Copyright
© International Astronomical Union 2020

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