Far-ultraviolet aurora identified at comet 67P/Churyumov-Gerasimenko

@article{Galand2020FarultravioletAI,
  title={Far-ultraviolet aurora identified at comet 67P/Churyumov-Gerasimenko},
  author={Marina Galand and Paul D. Feldman and Dominique Bockel{\'e}e-Morvan and Nicolas Biver and Y.-C. Cheng and G Rinaldi and Martin Rubin and Kathrin Altwegg and Jan Deca and Arnaud Beth and Peter C. Stephenson and K. L. Heritier and Pierre Henri and Joel Wm. Parker and Chris Carr and Anders I. Eriksson and James L. Burch},
  journal={Nature Astronomy},
  year={2020},
  pages={1-8}
}
Having a nucleus darker than charcoal, comets are usually detected from Earth through the emissions from their coma. The coma is an envelope of gas that forms through the sublimation of ices from the nucleus as the comet gets closer to the Sun. In the far-ultraviolet portion of the spectrum, observations of comae have revealed the presence of atomic hydrogen and oxygen emissions. When observed over large spatial scales as seen from Earth, such emissions are dominated by resonance fluorescence… 
Spatial Distribution of Ultraviolet Emission from Cometary Activity at 67P/Churyumov-Gerasimenko
The Alice ultraviolet spectrograph on board the Rosetta orbiter provided the first near-nucleus ultraviolet observations of a cometary coma from arrival at comet 67P/Churyumov-Gerasimenko in 2014
Multi-instrument analysis of far-ultraviolet aurora in the southern hemisphere of comet 67P/Churyumov-Gerasimenko
Aims. We aim to determine whether dissociative excitation of cometary neutrals by electron impact is the major source of far-ultraviolet (FUV) emissions at comet 67P/Churyumov-Gerasimenko in the
Analysis of Hybrid Gas–Dust Outbursts Observed at 67P/Churyumov–Gerasimenko
Cometary outbursts offer a valuable window into the composition of comet nuclei with their forceful ejection of dust and volatiles in explosive events, revealing the interior components of the comet.
On the Origin and Evolution of the Material in 67P/Churyumov-Gerasimenko
TLDR
Two major findings of the Rosetta mission on the composition of comet 67P/Churyumov-Gerasimenko are discussed and their context is put in the context of what the authors know from other comets and solar system objects.
A Stable H2O Atmosphere on Europa’s Trailing Hemisphere From HST Images
  • L. Roth
  • Physics
    Geophysical Research Letters
  • 2021
Previous studies of the global intensities of the oxygen emissions at 1,356 Å and 1,304 Å revealed molecular oxygen (O2) in Europa's atmosphere. Here we investigate the relative changes of the two

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The Alice far-ultraviolet spectrograph onboard Rosetta is designed to observe emissions from various atomic and molecular species from within the coma of comet 67P/ Churyumov-Gerasimenko and to
The Nature and Frequency of the Gas Outbursts in Comet 67P/Churyumov-Gerasimenko observed by the Alice Far-ultraviolet Spectrograph on Rosetta
Alice is a far-ultraviolet imaging spectrograph onboard Rosetta that, amongst multiple objectives, is designed to observe emissions from various atomic and molecular species from within the coma of
FUV Spectral Signatures of Molecules and the Evolution of the Gaseous Coma of Comet 67P/Churyumov-Gerasimenko
The Alice far-ultraviolet imaging spectrograph onboard Rosetta observed emissions from atomic and molecular species from within the coma of comet 67P/Churyumov-Gerasimenko during the entire escort
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The Alice ultraviolet spectrograph on the European Space Agency Rosetta spacecraft observed comet 67P/Churyumov-Gerasimenko in its orbit around the Sun for just over two years. Alice observations
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TLDR
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