DOAJ Open Access 2025

Impact of a Coronal Mass Ejection on the Lunar Exosphere as Observed by CHACE‐2 on the Chandrayaan‐2 Orbiter

M. B. Dhanya Chemukula Mathin Yadav Smitha V. Thampi Tirtha Pratim Das R. Satheesh Thampi +1 lainnya

Abstrak

Abstract The Moon encountered an extreme space weather event (NOAA G5 class) on 10 May 2024, caused by a series of coronal mass ejections (CMEs). Chandra's Atmospheric Composition Explorer‐2 (CHACE‐2), a neutral gas mass spectrometer on board Chandrayaan‐2 orbiter, made in situ observations of the lunar exosphere during this period. Observations show an increase in total pressure around the arrival time of the CME impact on the Moon. The corresponding total number densities derived from these observations show an enhancement in the total number densities by more than an order of magnitude. The increase in lunar exospheric number densities by a factor >10, due to the solar wind ion sputter process, is consistent with earlier theoretical modeling. This is the first observational confirmation of the enhancement in lunar exospheric densities during a CME impact.

Topik & Kata Kunci

Geophysics. Cosmic physics

Penulis (6)

M. B. Dhanya

Chemukula Mathin Yadav

Smitha V. Thampi

Tirtha Pratim Das

R. Satheesh Thampi

Anil Bhardwaj

Format Sitasi

APA MLA BibTeX

Dhanya, M.B., Yadav, C.M., Thampi, S.V., Das, T.P., Thampi, R.S., Bhardwaj, A. (2025). Impact of a Coronal Mass Ejection on the Lunar Exosphere as Observed by CHACE‐2 on the Chandrayaan‐2 Orbiter. https://doi.org/10.1029/2025GL115737

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1029/2025GL115737
Akses: Open Access ✓