Japan Geoscience Union Meeting 2019

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[J] Oral

P (Space and Planetary Sciences ) » P-CG Complex & General

[P-CG23] Origin and evolution of materials in space

Sun. May 26, 2019 9:00 AM - 10:30 AM 201B (2F)

convener:Hitoshi Miura(Graduate School of Natural Sciences, Department of Information and Basic Science, Nagoya City University), Hideko Nomura(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Takafumi Ootsubo(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Aki Takigawa(Division of Earth and Planetary Science, Kyoto University), Chairperson:Ryo Tazaki, Aoi Takahashi

9:00 AM - 9:15 AM

[PCG23-01] Origin of cosmic dust: Galaxy-scale perspective

★Invited Papers

*Akio Inoue1,2 (1.Osaka Sangyo University, 2.Waseda University)

Galaxies are the fundamental component of the Universe. In the Milky Way Galaxy and other galaxies in the present (i.e. nearby) Universe, the mass ratio of dust and stars integrated over a galaxy-scale is about 0.1%. On the other hand, in the Universe several hundreds million years after the Big Bang, some galaxies have been detected in dust with ALMA but others haven't. The dust-to-stellar mass ratio integrated in a galaxy-scale is distributed over more than an order of magnitude. In this talk, I will discuss the reason of this diversity in dust mass in the early Universe and the origin of dust in a galaxy-wide scale.