تفاصيل الأوراق البحثية

Spatio-temporal Structure of Far Ultraviolet Martian Dayglow Observed by EMM-EMUS

خلاصة البحث

Mars' ultraviolet dayglow has been used to study its upper atmosphere for over four decades. Identifying variations in emission features has provided information on composition, density, and temperature. The Emirates Mars Ultraviolet Spectrometer onboard the Emirates Mars Mission observes Mars' dayglow at Far and Extreme UV wavelengths. Variations in disk emission features are studied, with a focus on O I 130.4, CO Fourth Positive Group and C I 156.1 nm. All show variations with local time (LT) and emission angle as expected. Dawn-dusk asymmetry observed is attributed to LT differences in advection. Variations in the brightness of several dayglow features, including 130.4 nm, with irregular shapes are noted in around 25% of the disk images. These display some LT and hemispheric asymmetry in their occurrence rates. Examination of their spatial structure, occurrence, and spectra suggests these are associated with variations in composition and photoelectron flux.

airglow Mars thermosphere
سنة النشر
2022
مجالات البحث
استكشاف الفضاء
الناشر
AGU GRL special collection: The First Results from the Emirates Mars Mission (EMM)
DOI
10.1029/2022gl099611
نوع البحث
رسالة بحثية
الأبحاث ذات الصلة