One of the objectives of spectrometers onboard space missions is to retrieve atmospheric
parameters (notably density, composition and temperature). To fulfill this objective …

Context. Accurate hydrogen spectra emitted by the entire solar disc in the Ly-α and Ly-βlines
are valuable for deriving the distribution and the behaviour of atomic hydrogen in the …

We present recent observations from the Hubble Space Telescope-Cosmic Origins
Spectrograph aimed at characterizing the auroral emission from the extrasolar planet HD …

Abstract In the Solar System giant planets, H Lyman α is the most intensive FUV
thermospheric emission line. It is expected to be a very intense emission line in the FUV …

Aims. The aim of this work is to characterize the impact of the solar UV flux and of the
electron precipitation on Jupiter's atmosphere and to study the H Lyman α intensity and …

Following the recent detection of an auroral signal on Uranus (Lamy et al.[2012]. Geophys.
Res. Lett. 39, 7105) during HST/STIS observation performed in November 2011, we …

The Jovian upper atmosphere has been extensively studied over the past few decades with
many observations having been made. Typically, the H 2 vibrational temperatures have …

To date, almost 20% of the known exoplanets are in the Earth/super-Earth mass regime, and
more have to be confirmed, as they represent about 40% of the Kepler candidates. Some of …

Partial frequency redistribution (PRD), describing the formation of the line profile, has
negligible observational effects for optical depths smaller than∼ 10 3, at the resolving power …

Aims. We present a method to detect the molecular hydrogen in extrasolar planetary
atmospheres. Methods. We model the coupling between H-Lyman lines and H 2 lines due to …