EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues A&A, 621 (2019) A72 Article references

Articles citing this article

The Citing articles tool gives a list of articles citing the current article.
The citing articles come from EDP Sciences database, as well as other publishers participating in CrossRef Cited-by Linking Program. You can set up your personal account to receive an email alert each time this article is cited by a new article (see the menu on the right-hand side of the abstract page).

Cited article:

Spatiotemporal evolution of UV pulsations and their connection to 3D magnetic reconnection and particle acceleration

Stefan Purkhart, Hannah Collier, Laura A. Hayes, Astrid M. Veronig, Miho Janvier and Säm Krucker
Astronomy & Astrophysics 698 A318 (2025)
https://doi.org/10.1051/0004-6361/202554475

Spectroscopic investigations of a filament reconnecting with coronal loops during a two-ribbon solar flare

Reetika Joshi, Jaroslav Dudík, Brigitte Schmieder, Guillaume Aulanier and Ramesh Chandra
Astronomy & Astrophysics 698 A301 (2025)
https://doi.org/10.1051/0004-6361/202554011

A Successful Sheared-arcade Eruption Triggered by a Failed Erupted Small Filament

Wentai Fu, Yiwei Ni, Jinhan Guo, Yang Guo, P. F. Chen and Mingde Ding
The Astrophysical Journal 986 (1) 95 (2025)
https://doi.org/10.3847/1538-4357/add88e

Dynamic Evolution of Magnetic Flux Ropes in Active Region 11429. II. Magnetic Characteristic of the Footpoints During the Preeruption and Eruption Phases

Yin Zhang, Jing Huang, Jihong Liu, Shangbin Yang, Yunfei Yang and Baolin Tan
The Astrophysical Journal 979 (2) 165 (2025)
https://doi.org/10.3847/1538-4357/ada383

The Birth of a Major Coronal Mass Ejection with Intricate Magnetic Structure from Multiple Active Regions

J. H. Guo, Y. W. Ni, B. Schmieder, Y. Guo, C. Xia, P. Devi, R. Chandra, S. Poedts, R. Joshi, Y. H. Zhou, H. T. Li and P. F. Chen
The Astrophysical Journal 983 (1) 48 (2025)
https://doi.org/10.3847/1538-4357/adb976

The role of the external toroidal magnetic field on the large-angle rotation of magnetic flux ropes

Xiaomeng Zhang, Jinhan Guo, Yang Guo and Mingde Ding
Astronomy & Astrophysics 695 A1 (2025)
https://doi.org/10.1051/0004-6361/202451543

Two Events with Spectacular Moving Structures in a Failed Solar Filament Eruption

Yudi Ou, Yingna Su, Qingmin Zhang, Haisheng Ji, Leping Li, Hongqiang Song, Yijun Hou, Guiping Zhou, Baolin Tan, Kaifan Ji, Zhe Xu, Yongyuan Xiang, Zhenyong Hou, Yang Guo and Ye Qiu
The Astrophysical Journal 988 (1) 14 (2025)
https://doi.org/10.3847/1538-4357/addec9

Data-driven Modeling of a Coronal Magnetic Flux Rope: From Birth to Death

J. H. Guo, Y. W. Ni, Y. Guo, C. Xia, B. Schmieder, S. Poedts, Z. Zhong, Y. H. Zhou, F. Yu and P. F. Chen
The Astrophysical Journal 961 (1) 140 (2024)
https://doi.org/10.3847/1538-4357/ad088d

Modeling the propagation of coronal mass ejections with COCONUT: Implementation of the regularized Biot-Savart law flux rope model

J. H. Guo, L. Linan, S. Poedts, Y. Guo, A. Lani, B. Schmieder, M. Brchnelova, B. Perri, T. Baratashvili, Y. W. Ni and P. F. Chen
Astronomy & Astrophysics 683 A54 (2024)
https://doi.org/10.1051/0004-6361/202347634

Filament eruption by multiple reconnections

Y. Liu, G. P. Ruan, B. Schmieder, J. H. Guo, Y. Chen, R. S. Zheng, J. T. Su and B. Wang
Astronomy & Astrophysics 687 A130 (2024)
https://doi.org/10.1051/0004-6361/202449774

Recent advances in solar data-driven MHD simulations of the formation and evolution of CME flux ropes

Schmieder Brigitte, Guo Jinhan and Poedts Stefaan
Reviews of Modern Plasma Physics 8 (1) (2024)
https://doi.org/10.1007/s41614-024-00166-3

Generic low-atmosphere signatures of swirled-anemone jets

Reetika Joshi, Guillaume Aulanier, Alice Radcliffe, Luc Rouppe van der Voort, Etienne Pariat, Daniel Nóbrega-Siverio and Brigitte Schmieder
Astronomy & Astrophysics 687 A172 (2024)
https://doi.org/10.1051/0004-6361/202449553

Dependence of coronal mass ejections on the morphology and toroidal flux of their source magnetic flux ropes

J. H. Guo, L. Linan, S. Poedts, Y. Guo, B. Schmieder, A. Lani, Y. W. Ni, M. Brchnelova, B. Perri, T. Baratashvili, S. T. Li and P. F. Chen
Astronomy & Astrophysics 690 A189 (2024)
https://doi.org/10.1051/0004-6361/202449731

Fast Downflows Observed during a Polar Crown Filament Eruption

Zheng Sun, Hui Tian, Ting Li, Rui Liu and Yadan Duan
The Astrophysical Journal 974 (2) 205 (2024)
https://doi.org/10.3847/1538-4357/ad738d

The Relationships among Solar Flare Impulsiveness, Energy Release, and Ribbon Development

Cole A. Tamburri, Maria D. Kazachenko and Adam F. Kowalski
The Astrophysical Journal 966 (1) 94 (2024)
https://doi.org/10.3847/1538-4357/ad3047

Slowly positively drifting bursts generated by large-scale magnetic reconnection

Alena Zemanová, Marian Karlický, Jaroslav Dudík, Jana Kašparová and Ján Rybák
Astronomy & Astrophysics 690 A241 (2024)
https://doi.org/10.1051/0004-6361/202450641

Developments of a fundamental mechanism for initiation of solar eruptions

Chaowei Jiang, Xinkai Bian, Xueshang Feng, Zhenjun Zhou, Aiying Duan, Xinyi Wang, Peng Zou, Pingbing Zuo and Yi Wang
Reviews of Modern Plasma Physics 8 (1) (2024)
https://doi.org/10.1007/s41614-024-00155-6

The Solar Origin of an Intense Geomagnetic Storm on 1 December 2023: Successive Slipping and Eruption of Multiple Magnetic Flux Ropes

Zheng Sun, Ting Li, Yijun Hou, Hui Tian, Ziqi Wu, Ke Li, Yining Zhang, Zhentong Li, Xianyong Bai, Li Feng, Chuan Li, Zhenyong Hou, Qiao Song, Jingsong Wang and Guiping Zhou
Solar Physics 299 (6) (2024)
https://doi.org/10.1007/s11207-024-02329-4

Rotation and Confined Eruption of a Double Flux-rope System

X. M. Zhang, J. H. Guo, Y. Guo, M. D. Ding and Rony Keppens
The Astrophysical Journal 961 (2) 145 (2024)
https://doi.org/10.3847/1538-4357/ad1521

Identifying footpoints of pre-eruptive and coronal mass ejection flux ropes with sunspot scars

Chen Xing, Guillaume Aulanier, Brigitte Schmieder, Xin Cheng and Mingde Ding
Astronomy & Astrophysics 682 A3 (2024)
https://doi.org/10.1051/0004-6361/202347053

Complete replacement of magnetic flux in a flux rope during a coronal mass ejection

Tingyu Gou, Rui Liu, Astrid M. Veronig, Bin Zhuang, Ting Li, Wensi Wang, Mengjiao Xu and Yuming Wang
Nature Astronomy 7 (7) 815 (2023)
https://doi.org/10.1038/s41550-023-01966-2

Simulation of a Solar Jet Formed from an Untwisting Flux Rope Interacting with a Null Point

Jiahao Zhu, Yang Guo, Mingde Ding and Brigitte Schmieder
The Astrophysical Journal 949 (1) 2 (2023)
https://doi.org/10.3847/1538-4357/acc9a7

Understanding the Lateral Drifting of an Erupting Filament with a Data-constrained Magnetohydrodynamic Simulation

J. H. 金涵 Guo 郭, Y. 晔 Qiu 邱, Y. W. 仪伟 Ni 倪, Y. 洋 Guo 郭, C. 川 Li 李, Y. H. 宇航 Gao 高, B. Schmieder, S. Poedts and P. F. 鹏飞 Chen 陈
The Astrophysical Journal 956 (2) 119 (2023)
https://doi.org/10.3847/1538-4357/acf198

Deflection of Coronal Mass Ejections in Unipolar Ambient Magnetic Fields

Michal Ben-Nun, Tibor Török, Erika Palmerio, Cooper Downs, Viacheslav S. Titov, Mark G. Linton, Ronald M. Caplan and Roberto Lionello
The Astrophysical Journal 957 (2) 74 (2023)
https://doi.org/10.3847/1538-4357/acfe6c

Energetics of a Solar Flare and a Coronal Mass Ejection Generated by a Hot Channel Eruption

Qingmin Zhang, Weilin Teng, Dong Li, Jun Dai and Yanjie Zhang
The Astrophysical Journal 958 (1) 85 (2023)
https://doi.org/10.3847/1538-4357/ad05bc

Observations of a Failed Solar Filament Eruption Involving External Reconnection

Yuehong 悦虹 Chen 陈, Xin 鑫 Cheng 程, Jun 俊 Chen 陈, Yu 煜 Dai 戴 and Mingde 明德 Ding 丁
The Astrophysical Journal 959 (2) 67 (2023)
https://doi.org/10.3847/1538-4357/ad09d8

Hybrid Data-driven Magnetofrictional and Magnetohydrodynamic Simulations of an Eruptive Solar Active Region

Andrey N. Afanasyev, Yuhong Fan, Maria D. Kazachenko and Mark C. M. Cheung
The Astrophysical Journal 952 (2) 136 (2023)
https://doi.org/10.3847/1538-4357/acd7e9

Multipoint study of the energy release and transport in the 28 March 2022, M4 flare using STIX, EUI, and AIA during the first Solar Orbiter nominal mission perihelion

Stefan Purkhart, Astrid M. Veronig, Ewan C. M. Dickson, Andrea Francesco Battaglia, Säm Krucker, Robert Jarolim, Bernhard Kliem, Karin Dissauer and Tatiana Podladchikova
Astronomy & Astrophysics 679 A99 (2023)
https://doi.org/10.1051/0004-6361/202346354

An atypical plateau-like extreme-ultraviolet late-phase solar flare driven by the nonradial eruption of a magnetic flux rope

Yuehong Chen, Yu Dai and Mingde Ding
Astronomy & Astrophysics 675 A147 (2023)
https://doi.org/10.1051/0004-6361/202345914

Investigating Pre-eruptive Magnetic Properties at the Footprints of Erupting Magnetic Flux Ropes

Wensi Wang, Jiong Qiu, Rui Liu, Chunming Zhu, Kai E. Yang, Qiang Hu and Yuming Wang
The Astrophysical Journal 943 (2) 80 (2023)
https://doi.org/10.3847/1538-4357/aca6e1

Rapid Rotation of an Erupting Prominence and the Associated Coronal Mass Ejection on 13 May 2013

Yuhao Zhou, Haisheng Ji and Qingmin Zhang
Solar Physics 298 (3) (2023)
https://doi.org/10.1007/s11207-023-02126-5

Sequential Remote Brightenings and Co-spatial Fast Downflows during Two Successive Flares

B. T. Wang, X. Cheng, C. Li, J. Chen and M. D. Ding
The Astrophysical Journal 953 (2) 172 (2023)
https://doi.org/10.3847/1538-4357/ace319

Evidence of external reconnection between an erupting mini-filament and ambient loops observed by Solar Orbiter/EUI

Z. F. Li, X. Cheng, M. D. Ding, et al.
Astronomy & Astrophysics 673 A83 (2023)
https://doi.org/10.1051/0004-6361/202245814

Data-constrained MHD Simulation of a Multi-ribbon Flare Corresponding to a Successful and a Confined Eruption

Wentai Fu, Yang Guo, Mingde Ding, Ze Zhong and Ye Qiu
The Astrophysical Journal 944 (2) 179 (2023)
https://doi.org/10.3847/1538-4357/acb6fb

Observation of Two Splitting Processes in a Partial Filament Eruption on the Sun: The Role of Breakout Reconnection

Zheng Sun, Ting Li, Hui Tian, Yijun Hou, Zhenyong Hou, Hechao Chen, Xianyong Bai and Yuanyong Deng
The Astrophysical Journal 953 (2) 148 (2023)
https://doi.org/10.3847/1538-4357/ace5b1

Space Plasma Physics: A Review

Bruce T. Tsurutani, Gary P. Zank, Veerle J. Sterken, Kazunari Shibata, Tsugunobu Nagai, Anthony J. Mannucci, David M. Malaspina, Gurbax S. Lakhina, Shrikanth G. Kanekal, Keisuke Hosokawa, Richard B. Horne, Rajkumar Hajra, Karl-Heinz Glassmeier, C. Trevor Gaunt, Peng-Fei Chen and Syun-Ichi Akasofu
IEEE Transactions on Plasma Science 51 (7) 1595 (2023)
https://doi.org/10.1109/TPS.2022.3208906

The automatic identification and tracking of coronal flux ropes

A. Wagner, E. K. J. Kilpua, R. Sarkar, D. J. Price, A. Kumari, F. Daei, J. Pomoell and S. Poedts
Astronomy & Astrophysics 677 A81 (2023)
https://doi.org/10.1051/0004-6361/202346260

Thermodynamic and Magnetic Topology Evolution of the X1.0 Flare on 2021 October 28 Simulated by a Data-driven Radiative Magnetohydrodynamic Model

J. H. Guo, Y. W. Ni, Z. Zhong, Y. Guo, C. Xia, H. T. Li, S. Poedts, B. Schmieder and P. F. Chen
The Astrophysical Journal Supplement Series 266 (1) 3 (2023)
https://doi.org/10.3847/1538-4365/acc797

Filament Leg–Leg Reconnection as a Source of Prominent Supra-arcade Downflows

Jaroslav Dudík, Guillaume Aulanier, Jana Kašparová, Marian Karlický, Alena Zemanová, Juraj Lörinčík and Miloslav Druckmüller
The Astrophysical Journal Letters 937 (1) L10 (2022)
https://doi.org/10.3847/2041-8213/ac8eaf

Apparent Footpoint Rotation and Writhe of Double Hot Channels in a Solar Flare

Yanjie Liu, Yingna Su, Rui Liu, Jialin Chen, Tie Liu and Haisheng Ji
The Astrophysical Journal 930 (2) 130 (2022)
https://doi.org/10.3847/1538-4357/ac63ac

Data-driven, time-dependent modeling of pre-eruptive coronal magnetic field configuration at the periphery of NOAA AR 11726

E. Lumme, J. Pomoell, D. J. Price, et al.
Astronomy & Astrophysics 658 A200 (2022)
https://doi.org/10.1051/0004-6361/202038744

Formation and Eruption of Hot Channels during an M6.5 Class Solar Flare

Yanjie Liu, Yingna Su, Rui Liu, Jialin Chen, Tie Liu and Haisheng Ji
The Astrophysical Journal 941 (1) 83 (2022)
https://doi.org/10.3847/1538-4357/aca08c

Mechanism of the Failed Eruption of an Intermediate Solar Filament

Zou Peng, Jiang Chaowei, Wang Juntao and Bian Xinkai
The Astrophysical Journal 928 (2) 160 (2022)
https://doi.org/10.3847/1538-4357/ac581f

Specialist Discussion Meeting: 3D structure of the flare chromosphere

David Kuridze, Lyndsay Fletcher and Hugh Hudson
Astronomy & Geophysics 63 (6) 6.34 (2022)
https://doi.org/10.1093/astrogeo/atac082

Validation and Interpretation of a Three-dimensional Configuration of a Magnetic Cloud Flux Rope

Qiang Hu, Chunming Zhu, Wen He, Jiong Qiu, Lan K. Jian and Avijeet Prasad
The Astrophysical Journal 934 (1) 50 (2022)
https://doi.org/10.3847/1538-4357/ac7803

Quantitative Characterization of Magnetic Flux Rope Properties for Two Solar Eruption Events

Wen He, Qiang Hu, Chaowei Jiang, Jiong Qiu and Avijeet Prasad
The Astrophysical Journal 934 (2) 103 (2022)
https://doi.org/10.3847/1538-4357/ac78df

Blueshifted Si iv 1402.77 Å Line Profiles in a Moving Flare Kernel Observed by IRIS

Juraj Lörinčík, Jaroslav Dudík and Vanessa Polito
The Astrophysical Journal 934 (1) 80 (2022)
https://doi.org/10.3847/1538-4357/ac78e2

Solar jets observed with the Interface Region Imaging Spectrograph (IRIS)

Brigitte Schmieder, Reetika Joshi and Ramesh Chandra
Advances in Space Research 70 (6) 1580 (2022)
https://doi.org/10.1016/j.asr.2021.12.013

Invited Review: Short-term Variability with the Observations from the Helioseismic and Magnetic Imager (HMI) Onboard the Solar Dynamics Observatory (SDO): Insights into Flare Magnetism

Maria D. Kazachenko, Marcel F. Albelo-Corchado, Cole A. Tamburri and Brian T. Welsch
Solar Physics 297 (5) (2022)
https://doi.org/10.1007/s11207-022-01987-6

Radiative Magnetohydrodynamic Simulation of the Confined Eruption of a Magnetic Flux Rope: Magnetic Structure and Plasma Thermodynamics

Can Wang, Feng Chen, Mingde Ding and Zekun Lu
The Astrophysical Journal Letters 933 (2) L29 (2022)
https://doi.org/10.3847/2041-8213/ac7c6f

Dynamic Evolution of Magnetic Flux Ropes in Active Region 11429. I. EUV Observations

Yin Zhang, Jihong Liu, Baolin Tan, Xiaoshuai Zhu and Yihua Yan
The Astrophysical Journal 940 (2) 125 (2022)
https://doi.org/10.3847/1538-4357/ac9b52

Imaging Evidence for Solar Wind Outflows Originating from a Coronal Mass Ejection Footpoint

Juraj Lörinčík, Jaroslav Dudík, Guillaume Aulanier, Brigitte Schmieder and Leon Golub
The Astrophysical Journal 906 (1) 62 (2021)
https://doi.org/10.3847/1538-4357/abc8f6

A New View of the Solar Interface Region from the Interface Region Imaging Spectrograph (IRIS)

Bart De Pontieu, Vanessa Polito, Viggo Hansteen, et al.
Solar Physics 296 (5) (2021)
https://doi.org/10.1007/s11207-021-01826-0

Partial Eruption, Confinement, and Twist Buildup and Release of a Double-decker Filament

Jialin Chen, Yingna Su, Rui Liu, Bernhard Kliem, Qingmin Zhang, Haisheng Ji and Tie Liu
The Astrophysical Journal 923 (2) 142 (2021)
https://doi.org/10.3847/1538-4357/ac2ba1

The Causes of Peripheral Coronal Loop Contraction and Disappearance Revealed in a Magnetohydrodynamic Simulation of Solar Eruption

Juntao Wang, Chaowei Jiang, Ding Yuan and Peng Zou
The Astrophysical Journal 911 (1) 2 (2021)
https://doi.org/10.3847/1538-4357/abe637

Three-dimensional magnetic reconnection in astrophysical plasmas

Ting Li, Eric Priest and Ruilong Guo
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 477 (2249) (2021)
https://doi.org/10.1098/rspa.2020.0949

Formation of Magnetic Flux Rope During Solar Eruption. I. Evolution of Toroidal Flux and Reconnection Flux

Chaowei Jiang, Jun Chen, Aiying Duan, et al.
Frontiers in Physics 9 (2021)
https://doi.org/10.3389/fphy.2021.746576

Tether-cutting and Overlying Magnetic Reconnections in an MHD Simulation of Prominence-cavity System

Tie Liu and Yingna Su
The Astrophysical Journal 915 (1) 55 (2021)
https://doi.org/10.3847/1538-4357/ac013a

Dynamics Evolution of a Solar Active-region Filament from a Quasi-static State to Eruption: Rolling Motion, Untwisting Motion, Material Transfer, and Chirality

Xiaoli Yan, Qiaoling Li, Guorong Chen, Zhike Xue, Li Feng, Jincheng Wang, Liheng Yang and Yan Zhang
The Astrophysical Journal 904 (1) 15 (2020)
https://doi.org/10.3847/1538-4357/abba81

Quantifying the Toroidal Flux of Preexisting Flux Ropes of Coronal Mass Ejections

C. Xing, X. Cheng, Jiong Qiu, Qiang Hu, E. R. Priest and M. D. Ding
The Astrophysical Journal 889 (2) 125 (2020)
https://doi.org/10.3847/1538-4357/ab6321

The role of small-scale surface motions in the transfer of twist to a solar jet from a remote stable flux rope

Reetika Joshi, Brigitte Schmieder, Guillaume Aulanier, Véronique Bommier and Ramesh Chandra
Astronomy & Astrophysics 642 A169 (2020)
https://doi.org/10.1051/0004-6361/202038562

Electric Current Evolution at the Footpoints of Solar Eruptions

Krzysztof Barczynski, Guillaume Aulanier, Miho Janvier, Brigitte Schmieder and Sophie Masson
The Astrophysical Journal 895 (1) 18 (2020)
https://doi.org/10.3847/1538-4357/ab893d

Radio, EUV, and X-Ray Observations during a Filament Rise in the 2011 June 7 Solar Flare

Marian Karlický, Jana Kašparová and Robert Sych
The Astrophysical Journal 888 (1) 18 (2020)
https://doi.org/10.3847/1538-4357/ab5801

External reconnection and resultant reconfiguration of overlying magnetic fields during sympathetic eruptions of two filaments

Y. J. Hou, T. Li, Z. P. Song and J. Zhang
Astronomy & Astrophysics 640 A101 (2020)
https://doi.org/10.1051/0004-6361/202038348

Manifestations of Three-dimensional Magnetic Reconnection in an Eruption of a Quiescent Filament: Filament Strands Turning to Flare Loops

Juraj Lörinčík, Jaroslav Dudík and Guillaume Aulanier
The Astrophysical Journal 885 (1) 83 (2019)
https://doi.org/10.3847/1538-4357/ab4519

The source and engine of coronal mass ejections

Manolis K. Georgoulis, Alexander Nindos and Hongqi Zhang
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377 (2148) 20180094 (2019)
https://doi.org/10.1098/rsta.2018.0094

Observational Analysis on the Early Evolution of a CME Flux Rope: Preflare Reconnection and Flux Rope’s Footpoint Drift

Hechao Chen, Jiayan Yang, Kaifan Ji and Yadan Duan
The Astrophysical Journal 887 (2) 118 (2019)
https://doi.org/10.3847/1538-4357/ab527e

Velocities of Flare Kernels and the Mapping Norm of Field Line Connectivity

Juraj Lörinčík, Guillaume Aulanier, Jaroslav Dudík, Alena Zemanová and Elena Dzifčáková
The Astrophysical Journal 881 (1) 68 (2019)
https://doi.org/10.3847/1538-4357/ab298f

Observations of a Footpoint Drift of an Erupting Flux Rope

Alena Zemanová, Jaroslav Dudík, Guillaume Aulanier, Julia K. Thalmann and Peter Gömöry
The Astrophysical Journal 883 (1) 96 (2019)
https://doi.org/10.3847/1538-4357/ab3926

Spectroscopy and Differential Emission Measure Diagnostics of a Coronal Dimming Associated with a Fast Halo CME

Astrid M. Veronig, Peter Gömöry, Karin Dissauer, Manuela Temmer and Kamalam Vanninathan
The Astrophysical Journal 879 (2) 85 (2019)
https://doi.org/10.3847/1538-4357/ab2712

Flare Reconnection-driven Magnetic Field and Lorentz Force Variations at the Sun’s Surface

Krzysztof Barczynski, Guillaume Aulanier, Sophie Masson and Michael S. Wheatland
The Astrophysical Journal 877 (2) 67 (2019)
https://doi.org/10.3847/1538-4357/ab1b3d

Observation of All Pre- and Post-reconnection Structures Involved in Three-dimensional Reconnection Geometries in Solar Eruptions

Jaroslav Dudík, Juraj Lörinčík, Guillaume Aulanier, Alena Zemanová and Brigitte Schmieder
The Astrophysical Journal 887 (1) 71 (2019)
https://doi.org/10.3847/1538-4357/ab4f86