Exploiting EIS/Hinode Imaging Diagnostic Capabilities

Details Exploiting EIS/Hinode Imaging Diagnostic Capabilities Exploiting EIS/Hinode Imaging Diagnostic Capabilities

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.1219u&link_type=abstract

American Astronomical Society, SPD meeting #40, #12.19; Bulletin of the American Astronomical Society, Vol. 41, p.831

Astronomy and Astrophysics

Astronomy

Scientific paper

Using a wide slit, also called slot, the Extreme-ultraviolet Imaging Spectrometer, on-board Hinode, is capable of obtaining relatively fast (1-3 min) simultaneous monochromatic images of various spectral lines with different formation temperatures ranging 0.4-3 MK. This mode allows us to study morphology and dynamics of solar coronal and transition region structures across the temperature spectrum in a similar way to an EUV imager. This is achieved at the expense of spectral resolution. In this paper we investigate the plasma diagnostic capabilities of these spectrally pure images.Wide slit images can be interpreted as a superposition of simultaneous narrow slit spectra from adjacent solar positions. From the comparison of consecutive narrow slit rasters and wide slit images, we demonstrate that by making simple assumptions it is possible to extract the narrow slit spectra out of the slot images. This encouraging result opens up the door for plasma diagnostics, like electron density from spectral line ratios and differential emission measure analysis, for solar dynamic events. Various examples, as well as the limitations and validity of the assumptions, are discussed.

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