Member

TAKIGAWA, Aki Associate Professor Earth and Planetary System Science Group Office: Science Building 1 (Central)-734 TEL: +81-3-5841-4523 FAX: -- E-mail: HP:
Research Field Astromineralogy, experimental astrophysics, material circulation in the galaxy Current Research Dust grains condensed around evolved stars are injected into the interstellar medium. Some of them survived processing in the the interstellar medium and protoplanetary disks and become a building block of the new stars and planetary systems.The solar system formed via dust and gas disk around the young sun as well 4.6 Gyr ago and will provide materials into space at the last stage of the stellar evolution. Such a cycle of materials between circumstellar environments and interstellar medium is referred to as "galactic material circulation". Presolar grains identified in primitive meteorites are survivors of circumstellar dust around evolved stars. They may record their formation around evolved stars and alteration in the interstellar medium and protoplanetary disk. Are the formation and alteration conditions of presolar grains unique in the galaxy? My research includes (1) mineralogical and cosmochemical analysis of presolar grains in primitive meteorites, (2) experiments of dust formation and alteration of dust analogues, and (3) observation of dust formation in protoplanetary disks and around evolved stars. Representative Publications 1. Takigawa A., Kim T-H., Igami Y., Umemoto T., Tsuchiyama A., Koike C. Matsuno J., and Watanabe T. (2019) Formation of transition alumina dust around AGB stars: condensation experiments using induction thermal plasma systems. The Astrophysical Journal Letters, 878:L7 (8pp). 2. Takigawa A., Stroud R. M., Nittler L. R., Alexander C. M. O’D. and Miyake A. (2018) High-temperature dust condensation around an AGB Star: Evidence from a highly pristine presolar corundum. Astrophys. J. Lette. 862, L13 (6 pp). 3. Takigawa A., Kamizuka T., Tachibana S. and Yamamura I. (2017) Dust formation and wind acceleration around the aluminum oxide–rich AGB star W Hydrae. Science Advances 3, eaao2149.

TAKIGAWA, Aki

Associate Professor
Earth and Planetary System Science Group

Office: Science Building 1 (Central)-734
TEL: +81-3-5841-4523
FAX: --
E-mail:
HP:

Research Field

Astromineralogy, experimental astrophysics, material circulation in the galaxy

Current Research

Dust grains condensed around evolved stars are injected into the interstellar medium. Some of them survived processing in the the interstellar medium and protoplanetary disks and become a building block of the new stars and planetary systems.The solar system formed via dust and gas disk around the young sun as well 4.6 Gyr ago and will provide materials into space at the last stage of the stellar evolution. Such a cycle of materials between circumstellar environments and interstellar medium is referred to as "galactic material circulation".
Presolar grains identified in primitive meteorites are survivors of circumstellar dust around evolved stars. They may record their formation around evolved stars and alteration in the interstellar medium and protoplanetary disk. Are the formation and alteration conditions of presolar grains unique in the galaxy? My research includes (1) mineralogical and cosmochemical analysis of presolar grains in primitive meteorites, (2) experiments of dust formation and alteration of dust analogues, and (3) observation of dust formation in protoplanetary disks and around evolved stars.

Representative Publications

1. Takigawa A., Kim T-H., Igami Y., Umemoto T., Tsuchiyama A., Koike C. Matsuno J., and Watanabe T. (2019) Formation of transition alumina dust around AGB stars: condensation experiments using induction thermal plasma systems. The Astrophysical Journal Letters, 878:L7 (8pp).
2. Takigawa A., Stroud R. M., Nittler L. R., Alexander C. M. O’D. and Miyake A. (2018) High-temperature dust condensation around an AGB Star: Evidence from a highly pristine presolar corundum. Astrophys. J. Lette. 862, L13 (6 pp).
3. Takigawa A., Kamizuka T., Tachibana S. and Yamamura I. (2017) Dust formation and wind acceleration around the aluminum oxide–rich AGB star W Hydrae. Science Advances 3, eaao2149.