Imaging Spectroscopy for Extrasolar Planet Detection

摘要: We propose that coronagraphic imaging in combination with moderate to high spectral resolution from the outset may prove more effective both detecting extrasolar planets and characterizing them than a standard approach. envisage an integral-field spectrograph coupled coronagraph produce data cube of two space dimensions one wavelength. For idealized case where spectrum star is well known unchanging across field, we discuss utility cross-correlation seek planet signal describe mathematical approach completely eliminate stray light host (although not its Poisson noise). point-spread function (PSF) dominated by diffraction scattering effects comprises multitude speckles within Airy pattern, typical space-based observation, turn wavelength dependence PSF advantage present general way contribution while preserving flux planet. call this method deconvolution. illustrate dramatic gains showing simulation results 20 ? detection Jovian at 2 pc m telescope, even though planet's peak only 1% wings star. This scales terrestrial 8 Terrestrial Planet Finder ~7 hr (or less appropriate spatial filtering). Data on characteristics hence atmospheric constituents possible biomarkers are naturally obtained as part process.