The chemical and isotopic compositions of Ryugu samples

by Dr Ryota Fukai (Institute of Space and Astronautical Science)

Tuesday 19 Jul 2022, 10:00 → 11:00 Asia/Shanghai

TDLI

Abstract

Constraints from meteoritics (e.g., age of the Solar System, chemical and isotopic compositions of the Solar System) covered a wide range of studies, such as geology, planetary science, and astronomy. Chondrites (undifferentiated meteorites) are the fragments of asteroids, but identifications of the specific parent asteroid are rarely available. The Hayabusa2 spacecraft delivered the samples collected from the near-Earth asteroid (162173) Ryugu (Cb-type) to Earth on 2020 December 6. The returned samples are rock fragments ranging in size up to ~10 mm, with a total mass of 5.4 g. The chemistry team, in the initial analysis of Hayabusa2, measured bulk chemical and isotopic compositions of Ryugu samples. They are mainly composed of materials like carbonaceous chondrite meteorite, notably the CI (Ivuna-type) group. CI group possesses the most primitive chemical compositions among extraterrestrial materials. Therefore, the elemental abundance of Ryugu samples potentially represents the average of the Solar System.

Biography

2022.3 ISAS/JAXA, assistant professor

2020.4–2022.2 ISAS/JAXA, postdoc fellow

2019.4–2020.3 The university of Tokyo, postdoc fellow

2019.3 Ph.D./Tokyo Institute of Technology

 

Interests: planetary formation, nucleosynthesis

Homepage of the Speaker

http://ryotafukai.web.fc2.com/

Chair

Masahiro Ogihara

Division

Astronomy and Astrophysics

Other information

Tencent Meeting link:  https://meeting.tencent.com/dm/mCsqCJgjQNOE

Meeting ID: 346-574-147