Table 3
Fit coefficients for the median and mean solar distance dependencies (10) of the four solar wind parameters derived from the combined Helios 1 and 2 data.
| Parameter | Median | Mean | Crossing distance | Yearly variation | |||
|---|---|---|---|---|---|---|---|
| dmed | emed | davg | eavg | [ au] | Δe | ||
| Magnetic field [nT] | 5.377(92) | -1.655(17) | 6.05(10) | -1.546(18) | 0.339(11) | 0.11 | |
| Velocity [102 km s−1] | 4.107(28) | 0.058(13) | 4.356(24) | 0.049(10) | 0.7(83)e3 | 0.012 | |
| Density [cm−3] | 5.61(27) | -2.093(46) | 7.57(30) | -2.010(38) | 0.027(73) | 0.072 | |
| Temperature [104 K] | 7.14(23) | -0.913(39) | 9.67(21) | -0.792(28) | 0.082(85) | 0.050 | |
Notes. Thenumbers in parentheses are the errors on the corresponding last digits of the quoted value. They are calculated from the estimated standard deviations of the fit parameters. The crossing distances indicate where the median and mean fits intersect each other. The yearly variation is the weighted standard deviation derived from the yearly fit exponents seen in Fig. 9.
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