Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation

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Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation. / Blanco-Cano, Xochitl; Battarbee, Markus; Turc, Lucile; Dimmock, Andrew P.; Kilpua, Emilia K.J.; Hoilijoki, Sanni; Ganse, Urs; Sibeck, David G.; Cassak, Paul A.; Fear, Robert C.; Jarvinen, Riku; Juusola, Liisa; Pfau-Kempf, Yann; Vainio, Rami; Palmroth, Minna.

In: Annales Geophysicae, Vol. 36, No. 4, 08.08.2018, p. 1081-1097.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Blanco-Cano, X, Battarbee, M, Turc, L, Dimmock, AP, Kilpua, EKJ, Hoilijoki, S, Ganse, U, Sibeck, DG, Cassak, PA, Fear, RC, Jarvinen, R, Juusola, L, Pfau-Kempf, Y, Vainio, R & Palmroth, M 2018, 'Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation', Annales Geophysicae, vol. 36, no. 4, pp. 1081-1097. https://doi.org/10.5194/angeo-36-1081-2018

APA

Blanco-Cano, X., Battarbee, M., Turc, L., Dimmock, A. P., Kilpua, E. K. J., Hoilijoki, S., ... Palmroth, M. (2018). Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation. Annales Geophysicae, 36(4), 1081-1097. https://doi.org/10.5194/angeo-36-1081-2018

Vancouver

Blanco-Cano X, Battarbee M, Turc L, Dimmock AP, Kilpua EKJ, Hoilijoki S et al. Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation. Annales Geophysicae. 2018 Aug 8;36(4):1081-1097. https://doi.org/10.5194/angeo-36-1081-2018

Author

Blanco-Cano, Xochitl ; Battarbee, Markus ; Turc, Lucile ; Dimmock, Andrew P. ; Kilpua, Emilia K.J. ; Hoilijoki, Sanni ; Ganse, Urs ; Sibeck, David G. ; Cassak, Paul A. ; Fear, Robert C. ; Jarvinen, Riku ; Juusola, Liisa ; Pfau-Kempf, Yann ; Vainio, Rami ; Palmroth, Minna. / Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation. In: Annales Geophysicae. 2018 ; Vol. 36, No. 4. pp. 1081-1097.

Bibtex - Download

@article{b752b44e63934ac28d667a10de9ca987,
title = "Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation",
abstract = "In this paper we present the first identification of foreshock cavitons and the formation of spontaneous hot flow anomalies (SHFAs) with the Vlasiator global magnetospheric hybrid-Vlasov simulation code. In agreement with previous studies we show that cavitons evolve into SHFAs. In the presented run, this occurs very near the bow shock. We report on SHFAs surviving the shock crossing into the downstream region and show that the interaction of SHFAs with the bow shock can lead to the formation of a magnetosheath cavity, previously identified in observations and simulations. We report on the first identification of long-term local weakening and erosion of the bow shock, associated with a region of increased foreshock SHFA and caviton formation, and repeated shock crossings by them. We show that SHFAs are linked to an increase in suprathermal particle pitch-angle spreads. The realistic length scales in our simulation allow us to present a statistical study of global caviton and SHFA size distributions, and their comparable size distributions support the theory that SHFAs are formed from cavitons. Virtual spacecraft observations are shown to be in good agreement with observational studies.",
author = "Xochitl Blanco-Cano and Markus Battarbee and Lucile Turc and Dimmock, {Andrew P.} and Kilpua, {Emilia K.J.} and Sanni Hoilijoki and Urs Ganse and Sibeck, {David G.} and Cassak, {Paul A.} and Fear, {Robert C.} and Riku Jarvinen and Liisa Juusola and Yann Pfau-Kempf and Rami Vainio and Minna Palmroth",
year = "2018",
month = "8",
day = "8",
doi = "10.5194/angeo-36-1081-2018",
language = "English",
volume = "36",
pages = "1081--1097",
journal = "Annales Geophysicae",
issn = "0992-7689",
publisher = "Copernicus Gesellschaft mbH",
number = "4",

}

RIS - Download

TY - JOUR

T1 - Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation

AU - Blanco-Cano, Xochitl

AU - Battarbee, Markus

AU - Turc, Lucile

AU - Dimmock, Andrew P.

AU - Kilpua, Emilia K.J.

AU - Hoilijoki, Sanni

AU - Ganse, Urs

AU - Sibeck, David G.

AU - Cassak, Paul A.

AU - Fear, Robert C.

AU - Jarvinen, Riku

AU - Juusola, Liisa

AU - Pfau-Kempf, Yann

AU - Vainio, Rami

AU - Palmroth, Minna

PY - 2018/8/8

Y1 - 2018/8/8

N2 - In this paper we present the first identification of foreshock cavitons and the formation of spontaneous hot flow anomalies (SHFAs) with the Vlasiator global magnetospheric hybrid-Vlasov simulation code. In agreement with previous studies we show that cavitons evolve into SHFAs. In the presented run, this occurs very near the bow shock. We report on SHFAs surviving the shock crossing into the downstream region and show that the interaction of SHFAs with the bow shock can lead to the formation of a magnetosheath cavity, previously identified in observations and simulations. We report on the first identification of long-term local weakening and erosion of the bow shock, associated with a region of increased foreshock SHFA and caviton formation, and repeated shock crossings by them. We show that SHFAs are linked to an increase in suprathermal particle pitch-angle spreads. The realistic length scales in our simulation allow us to present a statistical study of global caviton and SHFA size distributions, and their comparable size distributions support the theory that SHFAs are formed from cavitons. Virtual spacecraft observations are shown to be in good agreement with observational studies.

AB - In this paper we present the first identification of foreshock cavitons and the formation of spontaneous hot flow anomalies (SHFAs) with the Vlasiator global magnetospheric hybrid-Vlasov simulation code. In agreement with previous studies we show that cavitons evolve into SHFAs. In the presented run, this occurs very near the bow shock. We report on SHFAs surviving the shock crossing into the downstream region and show that the interaction of SHFAs with the bow shock can lead to the formation of a magnetosheath cavity, previously identified in observations and simulations. We report on the first identification of long-term local weakening and erosion of the bow shock, associated with a region of increased foreshock SHFA and caviton formation, and repeated shock crossings by them. We show that SHFAs are linked to an increase in suprathermal particle pitch-angle spreads. The realistic length scales in our simulation allow us to present a statistical study of global caviton and SHFA size distributions, and their comparable size distributions support the theory that SHFAs are formed from cavitons. Virtual spacecraft observations are shown to be in good agreement with observational studies.

UR - http://www.scopus.com/inward/record.url?scp=85051324690&partnerID=8YFLogxK

U2 - 10.5194/angeo-36-1081-2018

DO - 10.5194/angeo-36-1081-2018

M3 - Article

VL - 36

SP - 1081

EP - 1097

JO - Annales Geophysicae

JF - Annales Geophysicae

SN - 0992-7689

IS - 4

ER -

ID: 27327302