eprintid: 10196979
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/19/69/79
datestamp: 2024-09-16 12:24:07
lastmod: 2024-09-16 12:24:07
status_changed: 2024-09-16 12:24:07
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Boldu, JJ
creators_name: Graham, DB
creators_name: Morooka, M
creators_name: Andre, M
creators_name: Khotyaintsev, Yu V
creators_name: Dimmock, A
creators_name: Pisa, D
creators_name: Soucek, J
creators_name: Maksimovic, M
creators_name: Louarn, P
creators_name: Fedorov, A
creators_name: Nicolaou, G
creators_name: Owen, C
title: Ion-Acoustic Waves Associated With Interplanetary Shocks
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F63
keywords: Collisionless shock; plasma waves; instabilities
note: Copyright © 2024. The Author(s). Geophysical Research Letters published by Wiley Periodicals LLC on behalf of American Geophysical Union.
This is an open access article under the terms of the Creative Commons Attribution License, https://creativecommons.org/licenses/by/4.0/, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
abstract: Ion-acoustic waves (IAWs) commonly occur near interplanetary (IP) shocks. These waves are important because of their potential role in the dissipation required for collisionless shocks to exist. We study IAW occurrence statistically at different heliocentric distances using Solar Orbiter to identify the processes responsible for IAW generation near IP shocks. We show that close to IP shocks the occurrence rate of IAW increases and peaks at the ramp. In the upstream region, the IAW activity is highly variable among different shocks and increases with decreasing distance from the Sun. We show that the observed currents near IP shocks are insufficient to reach the threshold for the current-driven instability. We argue that two-stream proton distributions and suprathermal electrons are likely sources of the waves.
date: 2024-08-28
date_type: published
publisher: AMER GEOPHYSICAL UNION
official_url: http://dx.doi.org/10.1029/2024gl109956
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2308886
doi: 10.1029/2024GL109956
lyricists_name: Owen, Christopher
lyricists_name: Nicolaou, Georgios
lyricists_id: CJOWE13
lyricists_id: GNICO14
actors_name: Owen, Christopher
actors_id: CJOWE13
actors_role: owner
funding_acknowledgements: 22-10775S [Czech Science Foundation]
full_text_status: public
publication: Geophysical Research Letters
volume: 51
number: 16
article_number: e2024GL109956
pages: 10
issn: 0094-8276
citation:        Boldu, JJ;    Graham, DB;    Morooka, M;    Andre, M;    Khotyaintsev, Yu V;    Dimmock, A;    Pisa, D;                         ... Owen, C; + view all <#>        Boldu, JJ;  Graham, DB;  Morooka, M;  Andre, M;  Khotyaintsev, Yu V;  Dimmock, A;  Pisa, D;  Soucek, J;  Maksimovic, M;  Louarn, P;  Fedorov, A;  Nicolaou, G;  Owen, C;   - view fewer <#>    (2024)    Ion-Acoustic Waves Associated With Interplanetary Shocks.                   Geophysical Research Letters , 51  (16)    , Article e2024GL109956.  10.1029/2024GL109956 <https://doi.org/10.1029/2024GL109956>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10196979/1/Boldu_et_al_e2024GL109956.pdf