Professor Atsunori Yonehara

Area and Subject Taught Observational Cosmology
Research Theme(s) Gravitational Lensing Astronomy
Academic Degrees Doctor of Science, Kyoto University
Keywords for Research Field Doctor of Science, Kyoto University
Office Phone Number Not Public
e-mail Not Public

Research Overview

There are various objects and phenomena exit in universe. At present, both theoretical and observational research are being carried out in order to clarify the true nature of objects, and the physics behind phenomena. However, since the target objects are extremely distant, research is very different from experiments in a laboratory. It is always the problem that we can obtain only a limited amount of date from the target objects. To make bad things worse, electromagnetic radiation from the target objects is very faint.
Consequently, I am conducting research to develop more efficient observational approaches and data analysis techniques based on gravitational lensing, where the path of light is bent by the gravity of objects. If it is necessary for my research, I take any approach regardless of theoretical approach or observational approach. The gravitational lensing is a special phenomenon, and we can observe it only in huge spatial scale like universe. However, it is well known as a vital observational tool for astronomy today. At present, my specific research topics are exploring the environment and structure of quasars, and detection of extrasolar planets by using Kohyama Astronomical Observatory.

Notable Publications and Works in the Last Three Years

  1. T.Anguita, C.Faure, A.Yonehara et al., "Integral field spectroscopy of four lensed quasars:malysis of their neighborhood and evidence for microlensing" Astronomy and Astro physics, 481, pp.615-627. 2008.
  2. A. Yonehara et al., "Origin of chromatic features in multiple quasars. Variability,dust, or microlensing", Astronomy and Astrophysics, 478 pp.95-109, 2008
  3. I.Shimizu, M.Umemura, A.Yonehara "Large-scale structure of short-lived Lyman αemitter" Monthly Notices of the Royal Astronomical Society, 380, pp. L49-L53, 2007
  4. K.Yahata, A.Yonehara, Y.Suto et al., "The effect of FIR Emission from SDSS Galaxies on the SFD Galactic Extinction Map" Publication of the Astronomical Society of Japan, 59, pp.205-219, 2007