Table 2.
Mean values and standard derivation of the electron number density Ne, the proton (or solar wind) speed vp, and Cp = Npvpr2 as given by the SWEAP instrument on board PSP at 30, 50, and 70 R⊙ as well as by the OMNI database at 1 AU (= 215 R⊙).
| Parameter | r/R⊙ | Source | Value |
|---|---|---|---|
| Ne [cm−3] | 1 | Table 1 | (7.42 ± 3.18) × 108 |
| 30 | PSP | 676 ± 332 | |
| 50 | PSP | 222 ± 73 | |
| 70 | PSP | 157 ± 39 | |
| 215 | OMNI | 7.26 ± 3.71 | |
| vp [km s−1] | 30 | PSP | 308 ± 73 |
| 50 | PSP | 306 ± 39 | |
| 70 | PSP | 328 ± 79 | |
| 215 | OMNI | 390 ± 84 | |
| Cp [1034 s−1] | 30 | PSP | 7.18 ± 73 |
| 50 | PSP | 8.57 ± 5.63 | |
| 70 | PSP | 6.69 ± 1.95 | |
| 215 | OMNI | 5.05 ± 2.4 | |
Notes. Here, OMNI data are used only during PSP times. The values of the electron number density at the coronal base are determined by means of the data given in Table 1.
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