NRL, Solar Physics Branch, HRTS Project Home Page

Ultraviolet Observations of the Sun with the NRL High Resolution Telescope and Spectrograph (HRTS)

Profiles on C IV 1548 and 1550 Angstrom
transition zone lines in a sunspot (center)
bordered by an active region. The spatial
variations in the emission correspond to
the vertical direction where the spatial
resolution of the spectra are on the order
of 1" (725 km on the Sun). Doppler
shifts (horizontal direction) over sunspot
reveal down flows of up to 150 km/s.

NRL Naval Research Laboratory
Solar Physics Branch / Code 7660

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Last revised 27 September 1996
For more information send mail to Ken Dere