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Statements

Subject Item
n2:RIV%2F00216305%3A26210%2F10%3APU88266%21RIV11-GA0-26210___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
A recent analysis of Fe emission lines observed during the total solar eclipses of 2006 March 29 and 2008 August 1 established the first empirical link between the electron temperature in the expanding corona and Fe charge states measured in interplanetary space. In this Letter, we use this link to infer this temperature throughout solar cycle 23 from in situ charge state measurements from the Solar Wind Ion Composition Spectrometer (SWICS) on the Advanced Composition Explorer (ACE) and on Ulysses. The distribution of the SWICS/ACE Fe charge states, which span cycle 23 from 1998 to 2009, is skewed with a peak centered on Fe8+, Fe9+, and Fe10+ and a tail spanning Fe12+ to Fe20+. An iterative process based on this distribution and on the Fe ion fraction as a function of electron temperature yields a narrow peak at 1.1 E6 K. The tail in the measured charge state distribution is attributed to the sporadic release of material hotter than 2 E6 K from closed magnetic structures within the bulges of streamers A recent analysis of Fe emission lines observed during the total solar eclipses of 2006 March 29 and 2008 August 1 established the first empirical link between the electron temperature in the expanding corona and Fe charge states measured in interplanetary space. In this Letter, we use this link to infer this temperature throughout solar cycle 23 from in situ charge state measurements from the Solar Wind Ion Composition Spectrometer (SWICS) on the Advanced Composition Explorer (ACE) and on Ulysses. The distribution of the SWICS/ACE Fe charge states, which span cycle 23 from 1998 to 2009, is skewed with a peak centered on Fe8+, Fe9+, and Fe10+ and a tail spanning Fe12+ to Fe20+. An iterative process based on this distribution and on the Fe ion fraction as a function of electron temperature yields a narrow peak at 1.1 E6 K. The tail in the measured charge state distribution is attributed to the sporadic release of material hotter than 2 E6 K from closed magnetic structures within the bulges of streamers A recent analysis of Fe emission lines observed during the total solar eclipses of 2006 March 29 and 2008 August 1 established the first empirical link between the electron temperature in the expanding corona and Fe charge states measured in interplanetary space. In this Letter, we use this link to infer this temperature throughout solar cycle 23 from in situ charge state measurements from the Solar Wind Ion Composition Spectrometer (SWICS) on the Advanced Composition Explorer (ACE) and on Ulysses. The distribution of the SWICS/ACE Fe charge states, which span cycle 23 from 1998 to 2009, is skewed with a peak centered on Fe8+, Fe9+, and Fe10+ and a tail spanning Fe12+ to Fe20+. An iterative process based on this distribution and on the Fe ion fraction as a function of electron temperature yields a narrow peak at 1.1 E6 K. The tail in the measured charge state distribution is attributed to the sporadic release of material hotter than 2 E6 K from closed magnetic structures within the bulges of streamers
dcterms:title
On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23 On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23 On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23
skos:prefLabel
On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23 On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23 On the Constancy of the Electron Temperature in the Expanding Corona Throughout Solar Cycle 23
skos:notation
RIV/00216305:26210/10:PU88266!RIV11-GA0-26210___
n4:aktivita
n7:P
n4:aktivity
P(GA205/09/1469)
n4:cisloPeriodika
2
n4:dodaniDat
n13:2011
n4:domaciTvurceVysledku
n16:8961905
n4:druhVysledku
n18:J
n4:duvernostUdaju
n12:S
n4:entitaPredkladatele
n5:predkladatel
n4:idSjednocenehoVysledku
276835
n4:idVysledku
RIV/00216305:26210/10:PU88266
n4:jazykVysledku
n14:cze
n4:klicovaSlova
sun, corona, solar cycle, Fe ions, solar wind
n4:klicoveSlovo
n9:corona n9:Fe%20ions n9:sun n9:solar%20wind n9:solar%20cycle
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[664983A5184A]
n4:nazevZdroje
ASTROPHYSICAL JOURNAL
n4:obor
n8:BN
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
4
n4:projekt
n11:GA205%2F09%2F1469
n4:rokUplatneniVysledku
n13:2010
n4:svazekPeriodika
2010 (711)
n4:tvurceVysledku
Morgan, Huw Habbal, Shadia Rifai Ding, Adalbert Druckmüller, Miloslav
s:issn
0004-637X
s:numberOfPages
4
n17:organizacniJednotka
26210