Sun  ID: 2750

RHESSI Observes 2.2 MeV Line Emission from a Solar Flare

The solar flare at Active Region 10039 on July 23, 2002 exhibits many exceptional high-energy phenomena including the 2.223 MeV neutron capture line and the 511 keV electron-positron (antimatter) annihilation line. In the animation, the RHESSI low-energy channels (12-25 keV) are represented in red and appears predominantly in coronal loops. The high-energy flux appears as blue at the footpoints of the coronal loops. Violet is used to indicate the location and relative intensity of the 2.2MeV emission.

Visualization Credits

Tom Bridgman (GST): Lead Animator
Marte Newcombe (GST): Animator
Robert Lin (University of California at Berkeley): Scientist
Sam Krucker (University of California at Berkeley): Scientist
Gordon J. Hurford (University of California at Berkeley): Scientist
Ronald J. Murphy (NRL): Scientist
G. H. Share (NRL): Scientist
X.-M. Hua (L-3 Communications Analytics Corporation): Scientist
David M. Smith (University of California at Berkeley): Scientist
Richard A. Schwartz (NASA/GSFC): Scientist
Benzion Kozlovsky (Tel Aviv University): Scientist
William Steigerwald (NASA/GSFC): Writer
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio

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Data Used:
Big Bear Solar Observatory/H-alpha Telescope/H-alpha
Observed Data - BBSO - 2002/07/22T16:22:36-2002/07/23T01:21:45
Solar imagery in Hydrogen-alpha spectral line
The TRACE satellite views the Sun at ultraviolet wavelengths with high temporal (approximately 1-12 seconds) and spatial (1 arcsecond per pixel) resolution. Launched on April 2, 1998, it orbits the Earth in a Sun-synchronous orbit.
RHESSI/X-ray Imaging Spectrometer
The RHESSI instrument is an imaging spectrometer observing the Sun at X-ray to gamma-rays (photon energies of 3 keV to 17 MeV) at time resolutions of a few seconds. (eV stands for "electron volt" and is a unit of energy. Note that photons of visible light have energies of 2-3 eV. 1 keV is a thousand electron volts and 1 MeV is a million electron volts.
SOHO/Michelson Doppler Interferometer (MDI) also referred to as: SOHO/MDI
NASA and ESA - 2002/07/21T23:59:30-2002/07/23T17:35:30
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of these series:
Active Region 10039
Astrophysics Stills

Goddard TV Tapes:

SVS >> Active Region 10039
SVS >> Antimatter
SVS >> Coronal Loop
SVS >> Electron
SVS >> Positron
DLESE >> Space science
SVS >> X-ray
GCMD >> Earth Science >> Spectral/Engineering >> Gamma Ray
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Flares
SVS >> Neutron
NASA Science >> Sun
SVS >> X-ray Imaging

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version