Physics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..293w&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 293-296 (1999).
Physics
2
Visible
Scientific paper
We present intensity and line width measurements of the Fe X λ6374, Fe XI λ7892 and Fe XIV λ5303 lines between 1.03 and 1.4 Rs in a coronal hole and a streamer. The observations were made at the National Solar Observatory at Sacramento Peak on 26 February 1998. In the coronal hole, only the Fe X line was observed; an upper limit of 106 K for the electron temperature and 28 km/s for the amplitude of nonthermal motions was inferred from the Fe X measurements at 1.06 Rs. While all three lines were observed in the streamer, the unique result was that the width of the Fe XI line increased with heliocentric distance as opposed to a decrease in the Fe X and Fe XIV line widths. We interpret this as evidence for the existence of multitemperature static plasmas, and a solar wind outflow at the streamer base.
Esser Ruth
Habbal Shadia R.
Penn Matthew
Wood Christine H.
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