Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets

@article{Kawahara2014SpectroscopicCF,
  title={Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets},
  author={H. Kawahara and N. Murakami and T. Matsuo and T. Kotani},
  journal={Astrophysical Journal Supplement Series},
  year={2014},
  volume={212},
  pages={27}
}
We propose the application of coronagraphic techniques to the spectroscopic direct detection of exoplanets via the Doppler shift of planetary molecular lines. Even for an unresolved close-in planetary system, we show that the combination of a visible nuller and an extreme adaptive optics system can reduce the photon noise of a main star and increase the total signal-to-noise ratio (S/N) of the molecular absorption of the exoplanetary atmosphere: it works as a spectroscopic coronagraph. Assuming… Expand

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