A5075049618- Astro and Planetary Science
- Planetary Science and Exploration
- Space Exploration and Technology
- Isotope Analysis in Ecology
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Experimental and Theoretical Physics Studies
- Laser-induced spectroscopy and plasma
- Solar Radiation and Photovoltaics
- Geophysics and Sensor Technology
- Astronomy and Astrophysical Research
- Advanced Optical Sensing Technologies
University of Leicester
2013-2022
We present an analysis of recent high spatial and spectral resolution ground-based infrared observations H3+ spectra obtained with the 10-metre Keck II telescope in April 2011. observed emission from Saturn's northern southern auroral regions, simultaneously, over course more than two hours, obtaining images along central meridian as Saturn rotates. Previous work has derived only average temperature individual polar region, summing entire night observations. Here we analyse 20 spectra, 10...
We use an infrared dataset captured between 1984 and 2017 using several instruments observatories to report five rare equatorial disturbances that completely altered the appearance of Jupiter's Equatorial Zone (EZ): clearance tropospheric clouds revealed a new 5-$\mu$m-bright band encircling planet at equator, accompanied by large filaments. Three events were observed in ground-based images 1973, 1979 1992. characterize for first time entire evolution two episodes this unusual EZ state...
The intensity of H|$_3^+$| emission can be driven by both temperature and density, when fitting a set infrared line spectra, an anticorrelation between the fitted temperatures densities is commonly observed. ambiguity present in existing published literature on how to treat this effect puts into question physical significance derived parameters. Here, we examine nature quantify inherent uncertainty density that produces. We find produced very good approximation equal uncertainties are from...
Abstract We present the first detailed analysis of H 3 + nightside emission from Jupiter, using Visual and Infrared Mapping Spectrometer (VIMS) data Cassini flyby in 2000–2001, producing Jovian maps emission, temperature, column density. Using these, we identify characterize regions compared against past observations on dayside. focus our investigation region previously described as “mid‐to‐low latitude emission,” source for which has been controversial. find that brightest this is generated...
A multi-decade record of ground-based mid-infrared (7-25 $\mu$m) images Saturn is used to explore seasonal and non-seasonal variability in thermal emission over more than a Saturnian year (1984-2022). Thermal measured by 3-m 8-m-class observatories compares favourably with synthetic based on both Cassini-derived temperature records the predictions radiative climate models. 8-m class facilities are capable resolving contrasts scale Saturn's belts, zones, polar hexagon, cyclones, superimposed...
The abundance of deuterium in giant planet atmospheres provides constraints on the reservoirs ices incorporated into these worlds during their formation and evolution. Motivated by discrepancies measured deuterium-hydrogen ratio (D/H) Jupiter Saturn, we present a new measurement D/H methane for Saturn from ground-based measurements. We analysed spectral cube (covering 1151-1160 cm$^{-1}$ 6 February 2013) Texas Echelon Cross Echelle Spectrograph (TEXES) NASA's Infrared Telescope Facility...
James Blake, Rishbeth Prizewinner at the 2013 NAM, describes alignment of Saturn's auroral curtain using infrared data from Cassini.
AbstractObservations from the Texas Echelon Cross Echelle Spectrograph (TEXES) on NASA’s IRTF and VISIR instrument VLT are used to characterize Saturn’s seasonal changes. Radiative transfer modelling (using NEMESIS [8]) provides northern hemisphere temperature progression of atmosphere over 10 years, both during beyond Cassini mission. Comparisons between imaging observations taken one Saturn year apart (1989-2018) show extent interannual variability climate for first...