(Proposal ID) S16B-075

(PI) Nugroho, Stevanus Kristianto

(Proposal Title)
CO Detection of Directly Imaged Exoplanet

(Abstract)
The atmosphere of several transiting and non transiting hot Jupiter have been 
characterized using high dispersion spectroscopy. This technique allowed us to 
detect directly the molecular signature in the atmosphere not only because it 
allows us to resolve exoplanet molecular absorption band into its individual 
lines but also to separate it from telluric lines utilizing the Doppler shift 
owing to the radial velocity of the system. In this proposal we propose to use 
IRCS+AO188 to detect CO absorption lines on directly imaged exoplanet, k 
Andromedae b, that has been discovered during SEEDS project. We have developed 
our own script to remove the telluric and stellar contamination properly. 
If this observation succeed not only it will be the first high contrast and 
high-dispersion spectroscopy of directly imaged exoplanet ever conduct in 
Subaru telescope but also give us a chance to study the nature of this 
technique, which is very crucial for developing new instruments, pipelines 
and observing methods to conduct a detail characterization of exoplanet's 
atmosphere with the combination of IRD+SCExAO in Subaru telescope and with 
TMT in the near future which is the only HCHDS instrument in the northern 
hemisphere.