Waseda Institute for Advanced Study (WIAS)Waseda University

Name

SHIMAKAWA, Rhythm

Degree

Doctor of Philosophy

Status

Associate Professor

HP (URL)

https://sites.google.com/view/rhythmshimakawa/home

Research Topic

Large-scale structure and galaxy formation in big data astronomy

How did the universe evolve, and how did the Milky Way and its surrounding supercluster form? To answer these questions, we aim to draw the large-scale structure of the distant universe and statistically clarify the formation and evolutionary history of associated galaxies by using big data covering tens of thousands to tens of billions of objects and mathematical statistical analysis.

Monthly Spotlight

[Monthly Spotlight] is focusing on a researcher to introduce his/her research.
Uncovering the Mystery of the Origin and Formation of Galaxies through a National Survey of Space Using Citizen Science and AI

Education and Academic Employment

Education

Academic Employment

Fields of Research Interests

Astronomy

Academic Publications

• R. Shimakawa, et al., “King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z = 0.55 using the Subaru Hyper Suprime-Cam”, Monthly Notice of the Royal Astronomical Society Letter, vol.519, issue.1, pp.L45-L50, February 2023
• R. Shimakawa, “Search for extended Lyman-α emission around 9k quasars at z = 2-3”, Monthly Notice of the Royal Astronomical Society, vol.514, issue.3, pp.3910-3924, August 2022
• R. Shimakawa, et al. “Passive spiral galaxies deeply captured by Subaru Hyper Suprime-Cam”, Publications of the Astronomical Society of Japan, vol.74, issue.3, pp.612-624, June 2022
• R. Shimakawa, et al., “H-alpha emission in the outskirts of galaxies at z=0.4”, Publications of the Astronomical Society of Japan, vol.74, issue.2, pp.318-325, April 2022
• R. Shimakawa, et al., “Subaru Hyper Suprime-Cam revisits the large-scale environmental dependence on galaxy morphology over 360 deg2 at z=0.3-0.6”, Publications of the Astronomical Society of Japan, vol.73, issue.6, pp.1575-1588, December 2021
• R. Shimakawa, et al., “Subaru Hyper Suprime-Cam excavates colossal over- and underdense structures over 360 deg2 out to z=1”, Monthly Notice of the Royal Astronomical Society, vol.503, issue.3, pp.3896-3912, May 2021
• R. Shimakawa, et al., “MAHALO Deep Cluster Survey II. Characterizing massive forming galaxies in the Spiderweb protocluster at z=2.2”, Monthly Notice of the Royal Astronomical Society, vol.481, issue.4, pp.5630-5650, December 2018
• R. Shimakawa, et al., “MAHALO Deep Cluster Survey I. Accelerated and enhanced galaxy formation in the densest regions of a protocluster at z=2.5”, Monthly Notice of the Royal Astronomical Society, vol.473, issue.2, pp.1977-1999, January 2018
• Shimakawa, et al., “Direct evidence for Lyα depletion in the protocluster core”, Monthly Notice of the Royal Astronomical Society Letter, vol.468, issue.1, pp.L21-L25, June 2017
• R. Shimakawa, et al., “Similarities and uniqueness of Lyα emitters among star-forming galaxies at z=2.5”, Monthly Notice of the Royal Astronomical Society, vol.468, issue.1, pp.1123-1141, June 2017
• R. Shimakawa, et al., “Correlation between star formation activity and electron density of ionized gas at z=2.5”, Monthly Notices of the Royal Astronomical Society, vol.451, issue.2, pp.1284-1289, August 2015
• R. Shimakawa, et al., “An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z>2”, Monthly Notice of the Royal Astronomical Society, vol.448, issue.1, pp.666-680, March 2015
• R. Shimakawa et al., “Identification of the progenitors of rich clusters and member galaxies in rapid formation at z>2”, Monthly Notice of the Royal Astronomical Society Letter, vol.441, pp.L1-L5, June 2014

Other Interests

Basketball

Affiliated Academic Organizations

The Astronomical Society of Japan

Awards

2015 SOKENDAI Future Scientist Award
2017 The SOKENDAI Research Award