GCOE Member

Member Introductions

Isobe Naoki

Isobe Naoki

Education/Job Career History

  • 2002 Ph.D from Department of Physics, Tokyo University
  • 2002-2003 Aerospace Project Research Associate National Space Development Agency of Japan
  • 2003-2005 Aerospace Project Research Associate Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
  • 2005-2006 Postdoctoral Researcher Institute of Physical and Chemical Research (RIKEN)
  • 2006-2009 Special Postdoctoral Researcher, Institute of Physical and Chemical Research (RIKEN)

Research History

X-ray studies of astrophysical black holes and jets.

Development of Monitor of All Sky X-ray Image (MAXI).

Development of the ASTRO-E Hard X-ray Detector.

Research Plan at GCOE

I am studying supermassive black holes (BHs) at the center of galaxies, including active galactic nuclei, through the X-ray observations with Monitor of All-sky X-ray Image (MAXI). X-ray spectra and their variation can be the powerful probe to investigate the vicinity of BHs. Thanks to its unprecedentedly high sensitivity as an all-sky x-ray monitor, MAXI is the ideal laboratory for the study of X-ray activity of supermassive BHs in the sky. Especially, utilising the data to be obtained with MAXI in several years, I plan to search for supermassive "binary BHs", an active galaxy with twin supermassive BHs at its nucleus. The supermassive binary BHs are thought to be formed by mergers of two galaxies. Therefore, the discovery of the supermassive binary BHs will provide an important clue to the formation mechanism of supermassive BHs.


Due to the operation of MAXI, I frequently stay up all night long. But, my body has been gradually becoming weak (;_;)