Searching Solar X-ray Observations for Axions
Searching Solar X-ray Observations for Axions
Searching Solar X-ray Observations for Axions
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Hannah–Durham, July 2009<br />
RHESSI Quiet Sun Upper Limits<br />
• Reuven Ramaty High Energy <strong>Solar</strong> Spectroscopic Imager<br />
– NASA, operating since 2002<br />
• High spatial, temporal, energy resolution over 3keV to 17 MeV<br />
• Designed <strong>for</strong> bright compact flare observations<br />
– Not <strong>for</strong> large faint sources like Quiet Sun<br />
• Offpointing need to chop<br />
"signal"<br />
• Data up to April 2009<br />
• Still just upper limits<br />
• Even if actual signal it would<br />
NOT be dominated by axions<br />
• Thermal emission from hot<br />
XBPs seen in SXR<br />
• Non‐thermal emission from<br />
accelerated electrons in HXR<br />
quiet Sun/nanoflares<br />
14
Change language