Uranus in Northern Midspring: Persistent Atmospheric Temperatures and Circulations Inferred from Thermal Imaging

Uranus in Northern Midspring: Persistent Atmospheric Temperatures and Circulations Inferred from Thermal Imaging

We present results from mid-infrared imaging of Uranus at wavelengths of 13.0 and 18.7 m, sensing emission from the stratosphere and upper troposphere, acquired using the VISIR instrument at the Very Large Telescope, 2018 September 4-October 20. Using a combination of inverse and forward modeling, w...

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Veröffentlicht in:The Astronomical journal 2020-02, Vol.159 (2), p.45, Article 45
Hauptverfasser: Roman, Michael T., Fletcher, Leigh N., Orton, Glenn S., Rowe-Gurney, Naomi, Irwin, Patrick G. J.
Format: Artikel
Sprache:eng
Schlagworte:
Acetylene
Astronomy
Astronomy & Astrophysics
Atmospheric circulation
Atmospheric models
Atmospheric science
Cold traps
Emission analysis
Infrared imaging
North Pole
Outer planets
Photolysis
Physical Sciences
Planetary atmospheres
Planetary science
Science & Technology
Seasonal variations
Stratosphere
Temperature structure
Thermal circulation
Thermal imaging
Troposphere
Tropospheric circulation
Upper troposphere
Upper tropospheric circulation
Uranus
Very Large Telescope
Wavelengths
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Zusammenfassung:We present results from mid-infrared imaging of Uranus at wavelengths of 13.0 and 18.7 m, sensing emission from the stratosphere and upper troposphere, acquired using the VISIR instrument at the Very Large Telescope, 2018 September 4-October 20. Using a combination of inverse and forward modeling, we analyze these northern midspring (Ls ∼ 46°) images and compare them to archival data to assess seasonal changes since the 1986 southern solstice and subsequent equinox. We find the data are consistent with little change (
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ab5dc7