Shock deceleration in interplanetary coronal mass ejections (ICMEs) beyond Mercury's orbit until one AU
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10391205" target="_blank" >RIV/00216208:11320/18:10391205 - isvavai.cz</a>
Alternative codes found
RIV/68378289:_____/18:00501717
Result on the web
<a href="https://doi.org/10.1051/swsc/2018043" target="_blank" >https://doi.org/10.1051/swsc/2018043</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/swsc/2018043" target="_blank" >10.1051/swsc/2018043</a>
Alternative languages
Result language
angličtina
Original language name
Shock deceleration in interplanetary coronal mass ejections (ICMEs) beyond Mercury's orbit until one AU
Original language description
The CDPP propagation tool is used to propagate interplanetary coronal mass ejections (ICMEs) observed at Mercury by MESSENGER to various targets in the inner solar system (VEX, ACE, STEREO-A and B). The deceleration of ICME shock fronts between the orbit of Mercury and 1 AU is studied on the basis of a large dataset. We focus on the interplanetary medium far from the solor corona, to avoid the region where ICME propagation modifications in velocity and direction are the most drastic. Starting with a catalog of 61 ICMEs recorded by MESSENGER, the propagation tool predicts 36 ICME impacts with targets. ICME in situ signatures are investigated close to predicted encounter times based on velocities estimated at MESSENGER and on the default propagation tool velocity (500 km s(-1)). ICMEs are observed at the targets in 26 cases and interplanetary shocks (not followed by magnetic ejecta) in two cases. Comparing transit velocities between the Sun and MESSENGER ((v) over bar (Sunmess))and between MESSENGER and the targets ((v) over bar (MessTar)), we find an average deceleration of 170 km s(-1) (28 cases). Comparing (v) over bar (MessTar) to the velocities at the targets (v(Tar)), average ICME deceleration is about 160 km s(-1) (13 cases). Our results show that the ICME shock deceleration is significant beyond Mercury's orbit. ICME shock arrival times are predicted with an average accuracy of about six hours with a standard deviation of eleven hours. Focusing on two ICMEs detected first at MESSENGER and later on by two targets illustrates our results and the variability in ICME propagations. The shock velocity of an ICME observed at MESSENGER, then at VEX and finally at STEREO-B decreases all the way. Predicting arrivals of potentially effective ICMEs is an important space weather issue. The CDPP propagation tool, in association with in situ measurements between the Sun and the Earth, can permit to update alert status of such arrivals.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Space Weather and Space Climate
ISSN
2115-7251
e-ISSN
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Volume of the periodical
8
Issue of the periodical within the volume
Dec
Country of publishing house
FR - FRANCE
Number of pages
10
Pages from-to
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UT code for WoS article
000452287600002
EID of the result in the Scopus database
2-s2.0-85058169117