Using near infra-red spectroscopy for characterization of transiting exoplanets
arXiv:1504.05223 · doi:10.1051/0004-6361/201424058
Abstract
We propose a method for observing transiting exoplanets with near-infrared high-resolution spectrometers. We aim to create a robust data analysis method for recovering atmospheric transmission spectra from transiting exoplanets over a wide wavelength range in the near infrared. By using an inverse method approach, combined with stellar models and telluric transmission spectra, the method recovers the transiting exoplanet's atmospheric transmittance at high precision over a wide wavelength range. We describe our method and have tested it by simulating observations. This method is capable of recovering transmission spectra of high enough accuracy to identify absorption features from molecules such as O2, CH4, CO2, and H2O. This accuracy is achievable for Jupiter-size exoplanetsat S/N that can be reached for 8m class telescopes using high-resolution spectrometers (R>20 000) during a single transit, and for Earth-size planets and super-Earths transiting late K or M dwarf stars at S/N reachable during observations of less than 10 transits. We also analyse potential error sources to show the robustness of the method. Detection and characterization of atmospheres of both Jupiter-size planets and smaller rocky planets looks promising using this set-up.
14 pages, 14 figures, accepted to A&A
References in corpus (9)
- A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- Sodium Absorption From the Exoplanetary Atmosphere of HD189733b Detected in the Optical Transmission Spectrum
- Hubble Space Telescope times-series photometry of the planetary transit of HD189733: no moon, no rings, starspots
- On the formation of planetary systems via oligarchic growth in thermally evolving viscous discs
- Rayleigh scattering by H2 in the extrasolar planet HD209458b
- Spitzer Transits of the Super-Earth GJ1214b and Implications for Its Atmosphere
- Transit infrared spectroscopy of the hot neptune around GJ 436 with the Hubble Space Telescope
- Ground-based transit observations of the super-Earth GJ 1214b