Japanese
naoj

The Graduate University for Advanced Studies

  1. Home
  2. Faculty Members

Assistant Professor    YASUI, Chikako

Research Field

  • Optical and Infrared Astronomy, Astrophysics (Star and Planet Formation)

Degree

  • Ph.D. (Science), The University of Tokyo, 2010
    M.S. in Astronomy, The University of Tokyo, 2007
    B.S. in Physics, The University of Tokyo, 2005

Summary of Research

    My research aims to understand how stars and planetary systems form and evolve under diverse environmental conditions. In particular, I focus on low metallicity environments such as the outer regions of the Milky Way and the Magellanic Clouds, and conduct comparative studies of star forming regions and protoplanetary disks with those in the solar neighborhood to identify the key processes governing star and planet formation. Observationally, I use multi wavelength data spanning from optical to infrared and radio wavelengths, primarily based on observations with the Subaru Telescope and, more recently, the James Webb Space Telescope (JWST). I am also involved in the Thirty Meter Telescope (TMT) project, pursuing studies that anticipate the scientific opportunities enabled by future large ground based telescopes.

Research Achievements or Papers

  • “Revealing Potential Initial Mass Function Variations with Metallicity: JWST Observations of Young Open Clusters in a Low-metallicity Environment” Yasui C., Izumi N., Saito M., Lau R. M., Kobayashi N., Ressler M. E., 2024, ApJ, 975, 152.
  • “Mass Function of a Young Cluster in a Low-metallicity Environment. Sh 2-209” Yasui, C., Kobayashi, N., Saito, M., Izumi, N., Ikeda, Y., 2023, ApJ, 943, 137.
  • “Rapid evolution of the innermost dust disc of protoplanetary discs surrounding intermediate-mass stars” Yasui C., Kobayashi N., Tokunaga A. T., Saito M., 2014, MNRAS, 442, 2543.
  • “Short Lifetime of Protoplanetary Disks in Low-metallicity Environments” Yasui C., Kobayashi N., Tokunaga A. T., Saito M., Tokoku C., 2010, ApJL, 723, L113.
  • “The Lifetime of Protoplanetary Disks in a Low-metallicity Environment” Yasui C., Kobayashi N., Tokunaga A. T., Saito M., Tokoku C., 2009, ApJ, 705, 54.

Academic Society

  • Astronomical Society of Japan, American Astronomical Society, Japanese Society for Planetary Sciences, International Astronomical Union

Contact us

  • ck.yasui[at]nao.ac.jp
    (In the mailing address, replace [at] with @)

PageTop