J/ApJ/923/136 ICMEs observed by Juno between 1 and 5.4au (Davies+, 2021)
A catalog of interplanetary coronal mass ejections observed by Juno between 1
and 5.4 au.
Davies E.E., Forsyth R.J., Winslow R.M., Mostl C., Lugaz N.
<Astrophys. J., 923, 136 (2021)>
=2021ApJ...923..136D 2021ApJ...923..136D
ADC_Keywords: Sun; Magnetic fields
Keywords: Solar coronal mass ejections ; Dynamical evolution ; Heliosphere
Abstract:
We use magnetic field measurements by the Juno spacecraft to catalog
and investigate interplanetary coronal mass ejections (ICMEs) beyond
1au. During its cruise phase, Juno spent about 5yr in the solar wind
between 2011 September and 2016 June, providing measurements of the
interplanetary magnetic field (IMF) between 1 and 5.4au. Juno
therefore presents the most recent opportunity for a statistical
analysis of ICME properties beyond 1 au since the Ulysses mission
(1990-2009). Our catalog includes 80 such ICME events, 32 of which
contain associated flux-rope-like structures. We find that the
dependency of the mean magnetic field strength of the magnetic flux
ropes decreases with heliocentric distance as r-1.24±0.43 between
1 and 5.4au, in good agreement with previous relationships calculated
using ICME catalogs at Ulysses. We combine the Juno catalog with the
HELCATS catalog to create a data set of ICMEs covering 0.3-5.4au.
Using a linear regression model to fit the combined data set on a
double-logarithmic plot, we find that there is a clear difference
between global expansion rates for ICMEs observed at shorter
heliocentric distances and those observed farther out beyond 1au. The
cataloged ICMEs at Juno present a good basis for future
multispacecraft studies of ICME evolution between the inner
heliosphere, 1au, and beyond.
Description:
The magnetic field measurements used in this study were taken by the
Juno Magnetic Field Investigation instrument (MAG) and are available
via the Planetary Plasma Interactions (PPI) node of the Planetary Data
System (PDS) archive at http://pds-ppi.igpp.ucla.edu/
For this study, we use data taken between 2011 September and 2016 June
at a 1 minute time resolution and in SE coordinates, equivalent to
radial-tangential-normal (RTN) coordinates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 543 82 Interplanetary coronal mass ejection (ICME) catalog
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See also:
J/ApJS/182/12 : ICM entropy profiles (ACCEPT) (Cavagnolo+, 2009)
J/ApJ/868/124 : ICMEs events from 1998 to 2011 with ACE and WIND (Feng+, 2018)
J/ApJ/896/133 : 2001-2019 ICME with Forbush decrease events (Light+, 2020)
J/ApJ/900/123 : Abundances of heavy ions in ICMEs from 1998-2011 (Gu+, 2020)
J/ApJ/891/79 : Single storms and the related ICMEs from 1998-2011 (Li+, 2020)
J/A+A/671/A63 : Multi-population model for Iron ions in ICMEs (Gu+, 2023)
J/A+A/672/A33 : Jupiter's Interior from Juno EOS (Howard+, 2023)
http://pds-ppi.igpp.ucla.edu/ : Planetary Data System archive
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ID Unique Juno ID (1)
10 A1 --- f_ID [*] * = missing data
12- 15 F4.2 au HAE-r [0.99/5.5] Spacecraft heliocentric
distance, Heliocentric Aries Ecliptic
17- 21 F5.2 deg HAE-lat [-0.07/4.6] Spacecraft latitude,
Heliocentric Aries Ecliptic
23- 28 F6.2 deg HAE-lon [0.2/353] Spacecraft longitude,
Heliocentric Aries Ecliptic
30- 33 F4.2 au HEE-r [0.99/5.5] Spacecraft heliocentric
distance, Heliocentric Earth Ecliptic
35- 39 F5.2 deg HEE-lat [-0.07/4.6] Spacecraft latitude,
Heliocentric Earth Ecliptic
41- 46 F6.2 deg HEE-lon [0.5/360] Spacecraft longitude,
Heliocentric Earth Ecliptic
48- 66 A19 "datime" ICME-Start ICME Start datetime, ISO 3601 (2)
68- 86 A19 "datime" ICME-End ICME End datetime, ISO 3601 (2)
88- 92 F5.2 nT ICME-Bmean [1/12.7]? Mean magnetic field during ICME
94- 98 F5.2 nT ICME-Bmax [1.6/27]? Max magnetic field during ICME
100-118 A19 "datime" FR-Start Flux rope Start datetime, ISO 3601 (2)
120-138 A19 "datime" FR-End Flux rope End datetime, ISO 3601 (2)
141-159 A19 "datime" FR-Alt Alternative flux rope End datetime (3)
162-166 F5.2 nT FR-Bmean [1.17/19.7]? Mean magnetic field during
flux rope
169-173 F5.2 nT FR-AltBmean [4.17/19]? Alternative flux rope mean
magnetic field (3)
176-180 F5.2 nT FR-Bmax [1.4/21.1]? Max magnetic field during flux
rope
182-184 A3 --- FR-Type Flux rope type (4)
186 A1 --- FR-Hand [LR] Flux rope handedness (L=left-handed;
R=right-handed)
188 I1 --- Q [1/3] Quality of event (1:high quality) (5)
190-543 A354 --- Notes Notes on event
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Note (1): Where two or more flux ropes are associated with the same event,
the ID# is given a letter suffix (e.g. "a", "b").
Note (2): ICME start times correspond to when the shock-like discontinuity
associated with the event was first observed. FR start/end times
correspond to the leading and trailing edges of flux rope-like structures.
Note (3): Alternative date times and mean B fields are given for flux ropes
where the flux rope trailing edge is rather ambiguous to define.
Note (4): The inclination of each flux rope is estimated by determining the
flux rope type based on the classifications of
Bothmer & Schwenn (1998AnGeo..16....1B 1998AnGeo..16....1B) & Mulligan+ (1998GeoRL..25.2959M 1998GeoRL..25.2959M);
high-inclination flux rope types are ESW, WNE, ENW, and WSE, and
low-inclination flux rope types are SEN, NWS, SWN, and NES.
Note (5): The quality of the event is set between 1 and 3, where 1 is high
quality and 3 is the weakest.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-May-2023