Assistant Professor Nakajima, Tadashi
Research Field
- Present research area includes spectral variability of brown dwarfs and high-resolution infrared spectroscopy of M dwarfs. Past research area covers spectroscopy of brown dwarfs, coronagraphic search for brown dwarf companions around nearby stars and diffraction limited interferometric imaging on a large telescope.
Brief Introduction of Research
- Brown dwarf atmosphere is composed of molecules and dust and is very complicated. One way to observationally analyze this complex atmosphere is to obtain the depths from which individual molecular lines originate by spectral variability.
Chemical abundance in the stellar atmosphere gives the initial condition for the protoplanetary nebula from which planets are formed. High C/O ratio (>0.8) is expected to result in carbon dominated planets. We obtain the C/O ratios of M dwarfs by high resolution spectroscopy at K band using CO and H2O bands. We have found that carbon dominated planets are rare.
Contact us
- tadashi.nakajima[at]nao.ac.jp
(In the mailing address, replace [at] with @)
