S18A0136abst
S18A0136
Intermediate-mass stars have attracted increasing attention as promising sites for planet formation based on the discoveries of many giant planets by precise Doppler surveys of intermediate-mass giants and subgiants. On the other hand, planets around intermediate-mass dwarfs, namely, early-type dwarfs, had not been extensively explored due to the poor measurement precision in radial velocity because of the paucity of spectral features and the rapid rotation. Recently, however, a number of planetary candidates around A-type dwarfs have been reported by transit methods or stellar photometric variability observations. They are waiting to be confirmed by methods other than the Doppler one. Here we try to directly detect molecular features in spectra of a planetary atmosphere around an A-type dwarf with high-resolution infrared spectroscopy using Subaru/IRCS. The target is KELT-17b, a newly discovered transiting hot-jupiter around an A2-type star. The technique has recently been successful in detecting molecules in atmospheres of hot-jupiters around solar-type stars, but it has not been applied to detect/confirm planets around early-type stars. If successful, our knowledge about planets around early-type stars will be significantly enhanced.
This document was translated from LATEX by HEVEA.