Voyager 2 observations related to the October–November 2003 solar events | Zendy

Burlaga L. F. | Zendy; Ness N. F. | Zendy; Stone E. C. | Zendy; McDonald F. B. | Zendy; Richardson J. D. | Zendy

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Voyager 2 observations related to the October–November 2003 solar events

Author(s) -

Burlaga L. F.,

Ness N. F.,

Stone E. C.,

McDonald F. B.,

Richardson J. D.

Publication year - 2005

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2004gl021480

Subject(s) - ejecta , cosmic ray , forbush decrease , physics , shock (circulatory) , astrophysics , heliosphere , flux (metallurgy) , solar wind , intensity (physics) , astronomy , coronal mass ejection , plasma , supernova , optics , nuclear physics , medicine , materials science , metallurgy

A transient flow system observed at 1 AU from October 24–November 7, 2003 (consisting of several shocks, ejecta and possibly other flows) moved away from the Sun for ≈180 days to 73 AU, where Voyager 2 (V2) observed a large Merged Interaction Region (MIR) associated with a fast (560 km/s) stream that followed a forward shock and moved past V2 for ≈1.5 solar rotations. The MIR and stream were associated with a large decrease in the cosmic ray intensity and an exceptionally large enhancement in the flux of ≈2.5 MeV protons. The speed and the cosmic ray profiles observed by V2 were very simple, resembling the profiles of a shock/sheath/ejecta flow and a Forbush decrease, respectively, at 1 AU, but rescaled by a factor by a factor of ≈10. The onset of the MIR‐associated decrease in the cosmic ray intensity occurred 10 days after the shock, lasting several days, with a full recovery ≈70 days after the onset.

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