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BEGIN:VEVENT
DTSTAMP:20261026T131344Z
DTSTART;VALUE=DATE-TIME:20261012T140000
DTEND;VALUE=DATE-TIME:20261012T150000
SUMMARY:Bryn Parry (UCL): "Jupiter's X-ray Aurorae: A high signal spectra
 l analysis of the 0.24 to 7.00 keV energy range"
TZID:Europe/London
UID:20261012-8ac672c7a10f2c9001a11acf0f275d00@warwick.ac.uk
CREATED:20261008T091859Z
DESCRIPTION:Planetary X-ray astronomy provides an insight into the high e
 nergy processes that are present in the solar system. While visible ligh
 t shows us surface topographies and clouds\, X-rays reveal where matter 
 is being violently accelerated\, heated to millions of degrees\, or bomb
 arded by high-energy radiation. Applications of X-ray astronomy in the s
 olar system include studying planetary magnetospheres\, probing solar wi
 nd interactions\, and analysing surface composition analysis. The semina
 r will provide a summary of how X-rays are used to study these applicati
 ons and the challenges of using the current generation of X-ray instrume
 nts. Jupiter provides a natural laboratory for the study of charge excha
 nge (CX) processes. The X-ray aurorae have been found to be dominated by
  ion CX spectral lines from energetic particle precipitation from the ou
 ter magnetosphere into the auroral regions of Jupiter (Branduardi-Raymon
 t et al. 2007). Jupiter provides a unique opportunity to study the obser
 ved CX spectra and the ion population and conditions that produce them. 
 For example\, ion populations have been studied using the Juno Jupiter E
 nergetic Particle Detector (JEDI) instrument (e.g. Haggerty et al. 2017\
 ; Clark et al. 2020)\, along with spectral analysis of the aurora in the
  X-ray waveband (e.g. Elsner et al. 2005). These CX spectra have rarely 
 been directly compared with the ion populations that produce them. The s
 tudy investigates a high signal X-ray spectra from the northern auroral 
 regions of Jupiter using the XMM-Newton X-ray telescope in the energy ra
 nge 0.24 to 7.00 keV. The spectra are created from fourteen co-added obs
 ervations of Jupiter taken over a five-year period\, giving ~660 ks of r
 eliable observation time. The results show that a good fit is obtained w
 ith the ion species and abundances observed by JEDI on the first perijov
 e of the Juno mission. The study investigates potential CX emission line
 s in the high energy X-ray (1.60 keV ā€“ 7.00 keV) range confirming the de
 tection of high charge states of sulphur (S XV) with greater than 5 ļ³ si
 gnificance for S XV. This result shows that sulphur ions are precipitati
 ng into Jupiterā€™s northern auroral region with energies up to 30 MeV whi
 ch aligns well with the presence of megavolt potential drops previously 
 reported (Clarke et al. 2020).
LOCATION:A1.28\, Millburn House
URL:
ATTACH:
CATEGORIES:CFSA Seminar
LAST-MODIFIED:20261008T091859Z
ORGANIZER;CN=Dmitrii Kolotkov:
END:VEVENT
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