1 / 14

IMAGING SPECTROSCOPY WITH RHESSI

Dive into the spectral changes within a source, empirically studying processes affecting bremsstrahlung-producing electrons. Illustrated with an event on April 21, 2002, this research delves into light curves, photon spectra, contour maps, and conclusions that highlight spatial and temporal variations in hard X-ray spectra. Acknowledging the RHESSI team, Kim Tolbert, and Richard Schwartz.

formant
Télécharger la présentation

IMAGING SPECTROSCOPY WITH RHESSI

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IMAGING SPECTROSCOPY WITH RHESSI Gordon Emslie University of Alabama in Huntsville

  2. Why Imaging Spectroscopy? • Examine spectral changes from point to point within source • Determine empirically the physical processes affecting the bremsstrahlung-producing electrons • Illustration – April 21, 2002 event

  3. Light Curve

  4. Light Curve Rise Peak Fall

  5. Photon Spectrum (90-second overall) Power-law index 3.5 (30 – 70 keV)

  6. 20-30 keV images Overall (90 s) Fall (30s) Peak (30 s) Rise (30 s)

  7. 30-40 keV images Overall (90 s) Fall (30 s) Rise (30 s) Peak (30 s)

  8. 40-50 keV images Overall (90 s) Rise (30 s) Peak (30 s) Fall (30 s)

  9. 50-70 keV image(90 second overall)

  10. 70-100 keV image(90 second overall)

  11. 20-50 keV Contour Maps (rescaled – 2” pixels) 1 Fall (30 s) Rise (30 s) Peak (30 s) 1 1 2

  12. Spectra at each footpoint Scaled =3.5 power-law • = 1  = 2 Rise (30 s) Fall (30 s) Peak (30 s)

  13. Conclusions • There are significant spatial (and temporal) variations in the hard X-ray spectrum throughout the source • Analysis of these variations (especially with detectors 1 and 2 operating) will reveal the form of the physical processes affecting the bremsstrahlung-producing electrons

  14. Acknowledgements • The RHESSI team • Kim Tolbert and Richard Schwartz

More Related