Modelling the Lyman beta dayglow in the Jovian atmosphere

Mathieu Barthélemy (1) , Chris Parkinson (2) , Jean Lilensten (1) , Renée Prangé (3, 4)

1 LPG - Laboratoire de Planétologie de Grenoble
2 MS 150-21, Caltech, Pasadena
3 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
4 Physique des plasmas

The Lyman beta dayglow of Jupiter provides an important source of information about its atmosphere. The H Lyman beta and the H₂6-0 P(1) line of the Lyman system overlap, resulting in a coupling effect between these two lines. In this paper, we evaluate the effect of this overlapping via radiative transfer modelling and show its effect both on the integrated intensity and the line profile. The intensity increases at about 1025 Å at the centre of the disc, tends to slightly decrease at the limb, and creates an asymmetry in the profile. This asymmetry is also present in the jovian H-Lyman alpha bulge region.

Domaines: Astrophysique [astro-ph]

Mathieu Barthélemy, Chris Parkinson, Jean Lilensten, Renée Prangé. Modelling the Lyman beta dayglow in the Jovian atmosphere. Astronomy and Astrophysics - A&A, 2004, 423, pp.391-395. ⟨10.1051/0004-6361:20034532⟩. ⟨hal-03786474⟩