Millimetric thermal emission from the two faces of Iapetus

Léa Bonnefoy (1, 2) , Jean-Francois Lestrade (3) , Alice Le Gall (2) , Emmanuel Lellouch (1) , Cédric Leyrat (1) , Nicolas Ponthieu (4) , Bilal Ladjelate (5)

1 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
2 PLANETO - LATMOS
3 LERMA (UMR_8112) - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
4 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
5 IRAM - Institut de RadioAstronomie Millimétrique

We observed the two faces of Iapetus at 1.2and2.0mm using the New IRAM (Institut de RadioAstronomie Millimétrique) Kids Array (NIKA2)mounted on the IRAM-30 m telescope. On Iapetus’ trailing side, we confirm thepredictionof Ries (2012). On the leading side, however, we find that thebrightnesstemperatureis much lower at 1.2 and 2.0 mm than observed at 3 mm by Ries (2012).

Domaines: Planète et Univers [physics]

Léa Bonnefoy, Jean-Francois Lestrade, Alice Le Gall, Emmanuel Lellouch, Cédric Leyrat, et al.. Millimetric thermal emission from the two faces of Iapetus. EPSC-DPS Joint Meeting 2019, Sep 2019, Geneva, Switzerland. pp.EPSC-DPS2019-574-1. ⟨insu-02264965⟩