A prolonged He+ enhancement within a coronal mass ejection in the solar wind

R. M. Skoug; S. J. Bame; W. C. Feldman; J. T. Gosling; D. J. McComas; J. T. Steinberg; R. L. Tokar; P. Riley; L. F. Burlaga; N. F. Ness; C. W. Smith

doi:10.1029/1998GL900207

A prolonged He⁺ enhancement within a coronal mass ejection in the solar wind

R. M. Skoug
, S. J. Bame
, W. C. Feldman
, J. T. Gosling
, D. J. McComas
, J. T. Steinberg
, R. L. Tokar
, P. Riley
, L. F. Burlaga
, N. F. Ness
, C. W. Smith

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

A coronal mass ejection and magnetic cloud containing an unusually large enhancement of He⁺ was observed in the solar wind by the plasma and magnetic field instruments on the Advanced Composition Explorer (ACE) spacecraft on May 2-4, 1998. The He⁺/He⁺⁺ ratio during this event exceeded 0.5% for a period of more than 24 hours, and reached values as high as 100%. The high He⁺/He⁺⁺ ratio indicates the presence of prominence material, and in fact a disappearing filament and prominence were observed at the Sun in association with this event. The prolonged observation of He⁺ indicates that prominence material extended through much of this CME, the first such observation in a CME in the solar wind.

Original language	English (US)
Pages (from-to)	161-164
Number of pages	4
Journal	Geophysical Research Letters
Volume	26
Issue number	2
DOIs	https://doi.org/10.1029/1998GL900207
State	Published - Jan 15 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

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10.1029/1998GL900207

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title = "A prolonged He+ enhancement within a coronal mass ejection in the solar wind",

abstract = "A coronal mass ejection and magnetic cloud containing an unusually large enhancement of He+ was observed in the solar wind by the plasma and magnetic field instruments on the Advanced Composition Explorer (ACE) spacecraft on May 2-4, 1998. The He+/He++ ratio during this event exceeded 0.5\% for a period of more than 24 hours, and reached values as high as 100\%. The high He+/He++ ratio indicates the presence of prominence material, and in fact a disappearing filament and prominence were observed at the Sun in association with this event. The prolonged observation of He+ indicates that prominence material extended through much of this CME, the first such observation in a CME in the solar wind.",

author = "Skoug, \{R. M.\} and Bame, \{S. J.\} and Feldman, \{W. C.\} and Gosling, \{J. T.\} and McComas, \{D. J.\} and Steinberg, \{J. T.\} and Tokar, \{R. L.\} and P. Riley and Burlaga, \{L. F.\} and Ness, \{N. F.\} and Smith, \{C. W.\}",

year = "1999",

month = jan,

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doi = "10.1029/1998GL900207",

language = "English (US)",

volume = "26",

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journal = "Geophysical Research Letters",

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TY - JOUR

T1 - A prolonged He+ enhancement within a coronal mass ejection in the solar wind

AU - Skoug, R. M.

AU - Bame, S. J.

AU - Feldman, W. C.

AU - Gosling, J. T.

AU - McComas, D. J.

AU - Steinberg, J. T.

AU - Tokar, R. L.

AU - Riley, P.

AU - Burlaga, L. F.

AU - Ness, N. F.

AU - Smith, C. W.

PY - 1999/1/15

Y1 - 1999/1/15

N2 - A coronal mass ejection and magnetic cloud containing an unusually large enhancement of He+ was observed in the solar wind by the plasma and magnetic field instruments on the Advanced Composition Explorer (ACE) spacecraft on May 2-4, 1998. The He+/He++ ratio during this event exceeded 0.5% for a period of more than 24 hours, and reached values as high as 100%. The high He+/He++ ratio indicates the presence of prominence material, and in fact a disappearing filament and prominence were observed at the Sun in association with this event. The prolonged observation of He+ indicates that prominence material extended through much of this CME, the first such observation in a CME in the solar wind.

AB - A coronal mass ejection and magnetic cloud containing an unusually large enhancement of He+ was observed in the solar wind by the plasma and magnetic field instruments on the Advanced Composition Explorer (ACE) spacecraft on May 2-4, 1998. The He+/He++ ratio during this event exceeded 0.5% for a period of more than 24 hours, and reached values as high as 100%. The high He+/He++ ratio indicates the presence of prominence material, and in fact a disappearing filament and prominence were observed at the Sun in association with this event. The prolonged observation of He+ indicates that prominence material extended through much of this CME, the first such observation in a CME in the solar wind.

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DO - 10.1029/1998GL900207

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AN - SCOPUS:0033556672

SN - 0094-8276

VL - 26

SP - 161

EP - 164

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 2

ER -

A prolonged He⁺ enhancement within a coronal mass ejection in the solar wind

Abstract

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