Astronomer / Astrophysicist
01 / ABOUT ME
I am a project assistant professor at Graduate School of Science and Engineering, Kagoshima University in Japan. My research interest is star and planet formation. I am particularly studying gas dynamics in star and planet formation processes around protostars with observations at (sub)millimeter wavelengths using ALMA and other telescopes.
Publication list
02 / RESEARCH
Stars and protoplanetary disks, which are disk-shaped structures with a size of ~100 au surrounding the central star, form through gravitational collapse of dense cores with a size of ~10,000 au. Then, planet formation occurs in the protoplanetary disks. Obtaining a whole picture of star and planet formation therefore requires understanding physical processes happening over a wide spatial range from ~10,000 au down to ~10 au. Below is research I led as the principle investigator.
RESEARCH / 01
Discoveries of a warped disk around L1489 IRS and multiple outflows from IRAS 15398-3359, both of which are single protostars, suggesting disk formation through chaotic mass accretion processes in turbulent environments.
Disk Structure around the Class I Protostar L1489 IRS Revealed by ALMA: A Warped-disk System Multiple Outflows around a Single Protostar IRAS 15398−3359
RESEARCH / 02
We probed gas kinematics around four protostars over radii of r~1000–10,000 au combining observations with radio interferometers and single dish telescopes. Revealed complex velocity structures on large scales, in contrast to systemic gas motions that are dominated by infall and rotation at small scales, suggest that rotation motions at scales less than ~1,000 are inherited from large-scale turbulence.
Which Part of Dense Cores Feeds Material to Protostars? The Case of L1489 IRS Probing Velocity Structures of Protostellar Envelopes: Infalling and Rotating Envelopes within Turbulent Dense Cores
RESEARCH / 03
Hint of early substructure formation in a young, embedded disk around Ced110 IRS4A, revealed by high-angular-resolution observations with ALMA conducted as a part of the eDisk large program.
Early Planet Formation in Embedded Disks (eDisk). V. Possible Annular Substructure in a Circumstellar Disk in the Ced110 IRS4 System
RESEARCH / 04
Looking into detailed gas dynamics within embedded disks around protostars beyond identifications of Keplerian rotation, which hint on-going mass accretion and planet formation processes.
Morphological and Kinematic Diagnostic of FU Orionis-type Outburst Mechanisms Nonthermal Velocity Dispersion in the Outer Disk of HL Taujn.insa.sai_at_gmail.com
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