Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves

Riku Järvinen; Markku Alho; Esa Kallio; Tuija Pulkkinen

doi:10.1029/2020GL087462

Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves

Riku Järvinen^*, Markku Alho, Esa Kallio, Tuija Pulkkinen

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

14 Sitaatiot (Scopus)

109 Lataukset (Pure)

Abstrakti

We study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres.

Alkuperäiskieli	Englanti
Artikkeli	e2020GL087462
Sivumäärä	9
Julkaisu	Geophysical Research Letters
Vuosikerta	47
Numero	11
DOI - pysyväislinkit	https://doi.org/10.1029/2020GL087462
Tila	Julkaistu - 16 kesäk. 2020
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Pääsy asiakirjaan

10.1029/2020GL087462Lisenssi: CC BY

Jarvinen_Oxygen_ion_escape_from_venus_is_modulatedFinal published version, 3,01 MBLisenssi: CC BY

Shokit ja turbulentit välivyöhykkeet heliosfäärissä
Alho, M. (Projektin jäsen), Pulkkinen, T. (Vastuullinen tutkija), Järvinen, R. (Projektin jäsen), Kallio, E. (Projektin jäsen), Knuuttila, O. (Projektin jäsen) & Lakka, A. (Projektin jäsen)
01/09/2017 → 31/08/2022
Projekti: Academy of Finland: Other research funding

Science-IT
Hakala, M. (Manager)
Perustieteiden korkeakoulu
Laitteistot/tilat: Facility

Siteeraa tätä

@article{89e9c1221055443c9aa6bf8c11bc488d,

title = "Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves",

abstract = "We study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres.",

author = "Riku J{\"a}rvinen and Markku Alho and Esa Kallio and Tuija Pulkkinen",

year = "2020",

month = jun,

day = "16",

doi = "10.1029/2020GL087462",

language = "English",

volume = "47",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley & Sons",

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TY - JOUR

T1 - Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves

AU - Järvinen, Riku

AU - Alho, Markku

AU - Kallio, Esa

AU - Pulkkinen, Tuija

PY - 2020/6/16

Y1 - 2020/6/16

N2 - We study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres.

AB - We study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres.

U2 - 10.1029/2020GL087462

DO - 10.1029/2020GL087462

M3 - Article

SN - 0094-8276

VL - 47

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 11

M1 - e2020GL087462

ER -

Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves

Abstrakti

Pääsy asiakirjaan

Sormenjälki

Projektit

Shokit ja turbulentit välivyöhykkeet heliosfäärissä

Laitteet

Science-IT

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