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The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles
R. F. Díaz, D. Ségransan, S. Udry +22
We present the analysis of the entire HARPS observations of three stars that host planetary systems: HD1461, HD40307, and HD204313. The data set spans eight years and contains more…
A Non-isothermal Theory for Interpreting Sodium Lines in Transmission Spectra of Exoplanets
Kevin Heng, Aurélien Wyttenbach, Baptiste Lavie +3
We present a theory for interpreting the sodium lines detected in transmission spectra of exoplanetary atmospheres. Previous analyses employed the isothermal approximation and deal…
Spectrally resolved detection of sodium in the atmosphere of HD189733b with the HARPS spectrograph
A. Wyttenbach, D. Ehrenreich, C. Lovis +2
Atmospheric properties of exoplanets can be constrained with transit spectroscopy. The signature of atomic sodium NaI, known to be present above the clouds, is a powerful probe of…