Simultaneous Observations of Cosmic Ray Particles in a Corotating Interplanetary Structure at Different Solar Distances between 0.3 and 1 AU from HELIOS 1 and 2 and IMP 7 and 8
Year: 1977
Type: book-chapter
Abstract: From December 1975 to June 1976 we observed \nan evolving recurrent proton enhancement with IMP 7/8 \nand Helios 1/2 at different distances from the sun. The \ncorotating character is established over 4 solar rotations. \nDue to the unique constellation in March 1976 simultaneous \nmeasurements were possible which allowed a study of the \nradial development undisturbed by temporal effects. The \nintensity variation of the ~4 - 13 MeV protons between \n0.43 and 1 AU revealed a sudden increase to a large positive gradient (+329 %/AU) in the leading edge of the \nevent. This value is consistent with a major source outside \n1 AU. We suggest an interplanetary acceleration which \nbecomes sufficiently effective within a fast solar wind \nstream.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1526489459