Early solar system dynamics

It has been discovered that carbonaceous chondrites and the other meteorites possess different isotopic compositions regarding various elements (i.e., isotopic dichotomy). Such observations most likely reflect the difference in the formation location of meteorite parent bodies. We have investigated isotopic compositions of Sr, Nd, and Mo in meteorites and their components to better understand the evolutionary processses in the early solar system.

Related papers

Yokoyama, T., Nagai, Y., Fukai, R., Hirata, T.

Origin and evolution of distinct Mo isotopic variabilities within carbonaceous and non-carbonaceous reservoirs.
Astrophys. J., 2019. 883, 62 (23pp). doi: 10.3847/1538-4357/ab39e7

Fukai, R., Yokoyama, T.

Nucleosynthetic Sr-Nd isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early Solar System.
Astrophys. J., 2019. 879, 79 (12 pp) doi: 10.3847/1538-4357/ab0e0d

Myojo, K., Yokoyama, T., Okabayashi, S., Wakaki, S., Sugiura, N. and Iwamori, H.

Origin and evolution of nucleosynthetic Sr isotope variability in calcium and aluminum-rich refractory inclusions.
The Astrophysical Journal, 853 (1), 48, 2018.

Yokoyama, T., Fukami, Y., Okui, W., Ito, N. and Yamazaki, H.

Nucleosynthetic Strontium Isotope Anomalies in Carbonaceous Chondrites.
Earth and Planetary Science Letters, 416, 46-55, 2015.