Solar wind helium observations on the Prognoz 7 satellite

Details Solar wind helium observations on the Prognoz 7 satellite Solar wind helium observations on the Prognoz 7 satellite

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382..269y&link_type=abstract

Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 269

Computer Science

1

Particle Emission, Solar Wind, Composition

Scientific paper

Solar wind data obtained with ion mass-energy-spectrometer on the Prognoz 7 satellite are analyzed to study the α-particle and proton features in different types of solar wind streams. In the streams from coronal holes the abundance of helium relative to proton slightly increases with increasing solar wind flux and proton density while in the streams from coronal streamers it decreases. Preferential α-particle acceleration and heating are often observed in the streams from coronal holes. Minimum (as well as negative) values of alpha-proton velocity difference are recorded in the heliospheric current sheet, shocked plasma and coronal mass ejections. Dependences of alpha-proton velocity difference and temperature ratio on several MHD parameters are compared for different types of streams.

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