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Heating effects from driven transverse and Alfvén waves in coronal loops

Research output: Contribution to journalArticle

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Heating effects from driven transverse and Alfvén waves in coronal loops. / Guo, Mingzhe; Van Doorsselaere, Tom; Karampelas, Kostas; Li, Bo; Antolin, Patrick; De Moortel, Ineke.

In: Astrophysical Journal, Vol. 870, No. 2, 55, 10.01.2019.

Research output: Contribution to journalArticle

Harvard

Guo, M, Van Doorsselaere, T, Karampelas, K, Li, B, Antolin, P & De Moortel, I 2019, 'Heating effects from driven transverse and Alfvén waves in coronal loops', Astrophysical Journal, vol. 870, no. 2, 55. https://doi.org/10.3847/1538-4357/aaf1d0

APA

Guo, M., Van Doorsselaere, T., Karampelas, K., Li, B., Antolin, P., & De Moortel, I. (2019). Heating effects from driven transverse and Alfvén waves in coronal loops. Astrophysical Journal, 870(2), [55]. https://doi.org/10.3847/1538-4357/aaf1d0

Vancouver

Guo M, Van Doorsselaere T, Karampelas K, Li B, Antolin P, De Moortel I. Heating effects from driven transverse and Alfvén waves in coronal loops. Astrophysical Journal. 2019 Jan 10;870(2). 55. https://doi.org/10.3847/1538-4357/aaf1d0

Author

Guo, Mingzhe ; Van Doorsselaere, Tom ; Karampelas, Kostas ; Li, Bo ; Antolin, Patrick ; De Moortel, Ineke. / Heating effects from driven transverse and Alfvén waves in coronal loops. In: Astrophysical Journal. 2019 ; Vol. 870, No. 2.

Bibtex - Download

@article{05dcf698b008414aa90356120ad37bac,
title = "Heating effects from driven transverse and Alfv{\'e}n waves in coronal loops",
abstract = "Recent numerical studies revealed that transverse motions of coronal loops can induce the Kelvin-Helmholtz Instability (KHI). This process could be important in coronal heating because it leads to dissipation of energy at small spatial-scale plasma interactions. Meanwhile, small amplitude decayless oscillations in coronal loops have been discovered recently in observations of SDO/AIA. We model such oscillations in coronal loops and study wave heating effects, considering a kink and Alfv{\'e}n driver separately and a mixed driver at the bottom of flux tubes. Both the transverse and Alfv{\'e}n oscillations can lead to the KHI. Meanwhile, the Alfv{\'e}n oscillations established in loops will experience phase mixing. Both processes will generate small spatial-scale structures, which can help the dissipation of wave energy. Indeed, we observe the increase of internal energy and temperature in loop regions. The heating is more pronounced for the simulation containing the mixed kink and Alfv{\'e}n driver. This means that the mixed wavemodes can lead to a more efficient energy dissipation in the turbulent state of the plasma and that the KHI eddies act as an agent to dissipate energy in other wave modes. Furthermore, we also obtained forward modelling results using the FoMo code. We obtained forward models which are very similar to the observations of decayless oscillations. Due to the limited resolution of instruments, neither Alfv{\'e}n modes nor the fine structures are observable. Therefore, this numerical study shows that Alfv{\'e}n modes probably can co-exist with kink modes, leading to enhanced heating.",
keywords = "Magnetohydrodynamics (MHD), Sun: corona, Sun: magnetic fields, Waves",
author = "Mingzhe Guo and {Van Doorsselaere}, Tom and Kostas Karampelas and Bo Li and Patrick Antolin and {De Moortel}, Ineke",
note = "Funding: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No.724326 and No.647214) (IDM). P.A. acknowledges funding from his STFC Ernest Rutherford Fellowship (No. ST/R004285/1).",
year = "2019",
month = "1",
day = "10",
doi = "10.3847/1538-4357/aaf1d0",
language = "English",
volume = "870",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "2",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Heating effects from driven transverse and Alfvén waves in coronal loops

AU - Guo, Mingzhe

AU - Van Doorsselaere, Tom

AU - Karampelas, Kostas

AU - Li, Bo

AU - Antolin, Patrick

AU - De Moortel, Ineke

N1 - Funding: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No.724326 and No.647214) (IDM). P.A. acknowledges funding from his STFC Ernest Rutherford Fellowship (No. ST/R004285/1).

PY - 2019/1/10

Y1 - 2019/1/10

N2 - Recent numerical studies revealed that transverse motions of coronal loops can induce the Kelvin-Helmholtz Instability (KHI). This process could be important in coronal heating because it leads to dissipation of energy at small spatial-scale plasma interactions. Meanwhile, small amplitude decayless oscillations in coronal loops have been discovered recently in observations of SDO/AIA. We model such oscillations in coronal loops and study wave heating effects, considering a kink and Alfvén driver separately and a mixed driver at the bottom of flux tubes. Both the transverse and Alfvén oscillations can lead to the KHI. Meanwhile, the Alfvén oscillations established in loops will experience phase mixing. Both processes will generate small spatial-scale structures, which can help the dissipation of wave energy. Indeed, we observe the increase of internal energy and temperature in loop regions. The heating is more pronounced for the simulation containing the mixed kink and Alfvén driver. This means that the mixed wavemodes can lead to a more efficient energy dissipation in the turbulent state of the plasma and that the KHI eddies act as an agent to dissipate energy in other wave modes. Furthermore, we also obtained forward modelling results using the FoMo code. We obtained forward models which are very similar to the observations of decayless oscillations. Due to the limited resolution of instruments, neither Alfvén modes nor the fine structures are observable. Therefore, this numerical study shows that Alfvén modes probably can co-exist with kink modes, leading to enhanced heating.

AB - Recent numerical studies revealed that transverse motions of coronal loops can induce the Kelvin-Helmholtz Instability (KHI). This process could be important in coronal heating because it leads to dissipation of energy at small spatial-scale plasma interactions. Meanwhile, small amplitude decayless oscillations in coronal loops have been discovered recently in observations of SDO/AIA. We model such oscillations in coronal loops and study wave heating effects, considering a kink and Alfvén driver separately and a mixed driver at the bottom of flux tubes. Both the transverse and Alfvén oscillations can lead to the KHI. Meanwhile, the Alfvén oscillations established in loops will experience phase mixing. Both processes will generate small spatial-scale structures, which can help the dissipation of wave energy. Indeed, we observe the increase of internal energy and temperature in loop regions. The heating is more pronounced for the simulation containing the mixed kink and Alfvén driver. This means that the mixed wavemodes can lead to a more efficient energy dissipation in the turbulent state of the plasma and that the KHI eddies act as an agent to dissipate energy in other wave modes. Furthermore, we also obtained forward modelling results using the FoMo code. We obtained forward models which are very similar to the observations of decayless oscillations. Due to the limited resolution of instruments, neither Alfvén modes nor the fine structures are observable. Therefore, this numerical study shows that Alfvén modes probably can co-exist with kink modes, leading to enhanced heating.

KW - Magnetohydrodynamics (MHD)

KW - Sun: corona

KW - Sun: magnetic fields

KW - Waves

U2 - 10.3847/1538-4357/aaf1d0

DO - 10.3847/1538-4357/aaf1d0

M3 - Article

VL - 870

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 55

ER -

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