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Assistant Professor    Harada, Nanase

Research Field

  • Nearby galaxies, astrochemistry

Degree

    Ph.D.

Summary of Research

  • Some galaxies form stars at extremely high rates. Others are rapidly accreting mass into super-massive black holes at their centers; these galactic nuclei emit high luminosity due to the release of gravitational energies. For such star formation or accretion onto the black holes, a large amount of gas is needed, much of which exist as molecules in these regions. The molecular gas consists of various species. The composition of these species change depending on the environment such as the radiation field from massive stars, cosmic rays from supernovae, and X-ray radiation from supermassive black holes. I am studying activities in nearby galaxies through such chemical composition using the radio interferometer ALMA and theoretical calculations. Such molecular diagnostics is useful in obscured regions where optical/infrared light cannot penetrate into.

Research Achievements or Papers

  • Please see ADS for the complete list (Updated March 2021):
  • Harada et al. "A New Network for Higher-temperature Gas-phase Chemistry. I. A Preliminary Study of Accretion Disks in Active Galactic Nuclei" (2010) ApJ 721, 1570
  • Harada et al. "Modeling the Molecular Composition in an Active Galactic Nucleus Disk" (2013) ApJ 765, 108
  • Harada et al. "ALMA Astrochemical Observations of the Infrared-luminous Merger NGC 3256" (2018) ApJ 855, 49

Academic Society

    Astronomical Society of Japan

Web Page

E-mail

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

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