Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows

Fionnlagh MacKenzie Dover; Rahul Sharma; Marianna B. Korsós; Robertus Erdélyi

doi:10.3847/1538-4357/abc349

Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows

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Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows. / MacKenzie Dover, Fionnlagh; Sharma, Rahul; Korsós, Marianna B.; Erdélyi, Robertus.

In: Astrophysical Journal, Vol. 905, No. 1, 72, 15.12.2020.

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MacKenzie Dover, Fionnlagh ; Sharma, Rahul ; Korsós, Marianna B. ; Erdélyi, Robertus. / Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows. In: Astrophysical Journal. 2020 ; Vol. 905, No. 1.

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@article{f64833ccc2f84ffa9b5b6725a633c246,

title = "Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows",

abstract = "We report the first observational detection of frequency modulation in the cross-sectional width of spicule structures due to field-aligned plasma flows. Cross-sectional width variations were estimated for the least superimposed off-limb spicules observed in high-resolution Hα imaging spectroscopy data. Analysis of estimated cross-sectional widths suggest periodic oscillations, concurrent with 2D numerical modeling for a jet structure in a stratified solar atmosphere. Spectral analysis for both observed and simulated cross-sectional widths indicate frequency modulation as noticeable shifts in estimated periodicities during rise and fall phases of field-aligned plasma flows in the jet structure. Furthermore, the presence of the first overtone in a dynamic/spicular waveguide is also evident in both the observed and the simulated jet structures. These harmonics can be an important tool for future chromospheric magnetoseismology investigations and applications to dynamic waveguides (like spicules). ",

author = "{MacKenzie Dover}, Fionnlagh and Rahul Sharma and Kors{\'o}s, {Marianna B.} and Robertus Erd{\'e}lyi",

year = "2020",

month = dec,

day = "15",

doi = "10.3847/1538-4357/abc349",

language = "English",

volume = "905",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "1",

}

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TY - JOUR

T1 - Signatures of Cross-sectional Width Modulation in Solar Spicules due to Field-aligned Flows

AU - MacKenzie Dover, Fionnlagh

AU - Sharma, Rahul

AU - Korsós, Marianna B.

AU - Erdélyi, Robertus

PY - 2020/12/15

Y1 - 2020/12/15

N2 - We report the first observational detection of frequency modulation in the cross-sectional width of spicule structures due to field-aligned plasma flows. Cross-sectional width variations were estimated for the least superimposed off-limb spicules observed in high-resolution Hα imaging spectroscopy data. Analysis of estimated cross-sectional widths suggest periodic oscillations, concurrent with 2D numerical modeling for a jet structure in a stratified solar atmosphere. Spectral analysis for both observed and simulated cross-sectional widths indicate frequency modulation as noticeable shifts in estimated periodicities during rise and fall phases of field-aligned plasma flows in the jet structure. Furthermore, the presence of the first overtone in a dynamic/spicular waveguide is also evident in both the observed and the simulated jet structures. These harmonics can be an important tool for future chromospheric magnetoseismology investigations and applications to dynamic waveguides (like spicules).

AB - We report the first observational detection of frequency modulation in the cross-sectional width of spicule structures due to field-aligned plasma flows. Cross-sectional width variations were estimated for the least superimposed off-limb spicules observed in high-resolution Hα imaging spectroscopy data. Analysis of estimated cross-sectional widths suggest periodic oscillations, concurrent with 2D numerical modeling for a jet structure in a stratified solar atmosphere. Spectral analysis for both observed and simulated cross-sectional widths indicate frequency modulation as noticeable shifts in estimated periodicities during rise and fall phases of field-aligned plasma flows in the jet structure. Furthermore, the presence of the first overtone in a dynamic/spicular waveguide is also evident in both the observed and the simulated jet structures. These harmonics can be an important tool for future chromospheric magnetoseismology investigations and applications to dynamic waveguides (like spicules).

UR - http://www.scopus.com/inward/record.url?scp=85098263871&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/abc349

DO - 10.3847/1538-4357/abc349

M3 - Article

AN - SCOPUS:85098263871

VL - 905

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 72

ER -