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BEGIN:VEVENT
DTSTAMP:20261012T054139Z
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 – 7.00 keV) range confirming the de
 tection of high charge states of sulphur (S XV) with greater than 5  si
 gnificance for S XV. This result shows that sulphur ions are precipitati
 ng into Jupiter’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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