[Séminaire LATMOS] L’exploration de l’exosphère de Mercure avec BepiColombo/PHEBUS

Mardi 17 février, Rozenn Robidel donnera un séminaire intitulé « l’exploration de l’exosphère de Mercure avec BepiColombo/PHEBUS ». Le séminaire aura lieu à 11h30 au LATMOS à Guyancourt en salle 2202. Il sera retransmis sur Zoom.

On Tuesday February 17th, Rozenn Robidel will give a seminar on the « Exploring Mercury’s Exosphere with BepiColombo/PHEBUS ». The seminar will take place at 11:30am in LATMOS Guyancourt in room 2202. It will be retransmitted on Zoom.

---

l’exploration de l’exosphère de Mercure avec BepiColombo/PHEBUS

Mardi 17 février 2026
11h30

LATMOS
Salle 2202
11, boulevard d’Alembert
Guyancourt

>>> VISIOCONFERENCE <<<
Le séminaire sera retransmis sur Zoom CNRS.
Contacter audrey.chatain [at] latmos.ipsl.fr pour obtenir le lien.

---

Abstract:

Mercury, the innermost planet of the Solar System, hosts a tenuous and highly dynamic exosphere primarily composed of atoms released from its surface through processes such as solar wind sputtering, micrometeoroid impact vaporization, and thermal desorption. Understanding this exosphere provides key insights into surface–space environment interactions on airless bodies.
The ESA–JAXA BepiColombo mission, currently en route to Mercury, carries the PHEBUS (Probing of Hermean Exosphere By Ultraviolet Spectroscopy) instrument, designed to characterize Mercury’s exosphere in the ultraviolet range. During the mission’s cruise phase, PHEBUS has already acquired valuable observations during Mercury flybys, offering a unique opportunity to study exospheric composition and variability under different solar conditions.
In this seminar, I will present the first results from these flyby observations, discuss the detected species and their spatial distributions, and explore how these measurements contribute to our understanding of Mercury’s exosphere ahead of BepiColombo’s orbital phase.

Previous LATMOS seminars are now available on Youtube:
https://youtube.com/playlist?list=PLVDexVGJCe0duF4LANooppLeGAdmlDRnN&si=mi5wjsxRsKgQQ6iC