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- W1985760136 abstract "In this paper the plasma properties of three streamers observed in 2003 by the Ultraviolet Coronagraph Spectrometer (UVCS) are presented for five heights from 1.75 to 5.0 R☉. The kinetic temperatures for protons (Tk,p) and the O5+ ions (Tk,O) are derived as a function of height with preferential heating of O5+ over protons recorded. By examining how Tk,p varies with latitude at each height, an idea of the magnetic field morphology is found. At 1.75 R☉ the elemental abundances (O, S, Ar, and Fe), electron temperature, and electron density are derived from the UV spectral data. All three streamers were quiescent with typical abundance values; however, no depleted cores were found. The first ionization potential (FIP) effect was detected for all three streamers with a bias of ~4. This is consistent with slow solar wind in situ measurements, thereby supporting the hypothetical connection between the two. All three streamers had a higher than expected electron temperature. The electron densities above 1.75 R☉ are derived from the Large Angle Spectroscopic Coronagraph (LASCO) C2 polarized brightness data. Estimates for the O5+ outflow velocities are obtained using the O VI λ1032 over λ1037 intensity ratios and the estimated electron densities. All three streamers showed evidence of significant outflows at 4.0 and 5.0 R☉." @default.
- W1985760136 created "2016-06-24" @default.
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- W1985760136 date "2007-12-10" @default.
- W1985760136 modified "2023-10-16" @default.
- W1985760136 title "The Physical Properties of Coronal Streamers. II." @default.
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- W1985760136 doi "https://doi.org/10.1086/522909" @default.
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