ASIAA Summer Students Program
ASIAA Summer Student Program 2022
July 1 - August 31

2022 Project Description

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Cosmic dust in the diffuse medium in and out of galaxies
This project can be carried out remotely.

Cosmic dust
galaxy evolution


Hiroyuki Hirashita
Find out more about supervisors on ASIAA website

Task Description and Goals

Dust (small solid particles) is contained in various environments in the Universe. In this project, we particularly focus on the nature of dust in the following two diffuse media: interstellar medium and circum-galactic medium. Students can choose one of the following unsolved problems and work on theoretical calculations/computations. (1) Evolution of carbon dust in the Universe: The exact form of carbonaceous materials in the interstellar medium is still unknown. In particular, the high abundance of aromatic carbons is a mystery. We try to explain theoretically how carbonaceous materials evolve in galaxies (interstellar medium), and aim at solving this mystery. (2) Evolution of dust in the circum-galactic medium (CGM). Although some observations revealed that dust exists in the CGM (i.e., out of galaxies), the origin of CGM dust is still unclear. We make a theoretical model for the evolution of dust in the CGM, and try to address why dust can exist in a wide area in the Universe, even out of galaxies.

Required Background

Basic understanding of physics and mathematics.

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