| Autor: |
D. Waldron, A. D. Bobra, O. B. Slee, Jeremy Lim |
| Rok vydání: |
1990 |
| Předmět: |
|
| Zdroj: |
Australian Journal of Physics. 43:801 |
| ISSN: |
0004-9506 |
| DOI: |
10.1071/ph900801 |
| Popis: |
Observations of the quasars 0606-795 and 0637-752 as the tail of Comet Wilson swept across them on May 1 and May 2, 1987, showed a three-fold increase in scintillation index over that of nearby compact radio sources outside the tail. Two scintillation regimes have been identified: (1) small-scale turbulence of 10-40 km develops near the tail-axis; (2) large-scale turbulence of 90-350 km is present in the off-axis transition region between the tail plasma and solar wind. At a distance 0�12 AU downstream from the nucleus the r.m.s. electron-density variation in these turbules is 4-8 cm-3 on axis and 0�8-1� 7 cm-3 in the transition region between the tail and the solar wind. The reported negative results from earlier comets are shown to be of doubtful significance. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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