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Measurement of the solar wind velocity with cometary tail rays

โœ Scribed by Jun-Ichi Watanabe

Publisher
Springer
Year
1991
Tongue
English
Weight
948 KB
Volume
132
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

Cometary tail rays are traces of the magnetic fields caught in the cometary magnetosphere. Time variations of these rays give us a way to measure the local solar wind velocity at the location of a comet. We introduce a simple method for determining the radial velocity of the solar wind by observing the ray folding motion, and show an example of its application to comet P/Brorsen-Metcalf 1989o, which resulted in 340 + 35 km s-1.

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โœ Taeil Bai ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Springer ๐ŸŒ English โš– 208 KB

When emitted at the same time, solar hard X-rays reflected by the photosphere arrive at an observer at later times than primary hard X-rays coming directly from the source. This time lag of albedo photons, therefore, should be taken into account in interpreting fine-scale hard X-ray time profiles. I