Evidence for the photospheric excitation of incompressible chromospheric waves

Morton, RJ, Verth, G, Fedun, V, Shelyag, Sergiy and Erdélyi, R 2013, Evidence for the photospheric excitation of incompressible chromospheric waves, Astrophysical journal, vol. 768, no. 1, pp. 1-11, doi: 10.1088/0004-637X/768/1/17.

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Title Evidence for the photospheric excitation of incompressible chromospheric waves
Author(s) Morton, RJ
Verth, G
Fedun, V
Shelyag, SergiyORCID iD for Shelyag, Sergiy orcid.org/0000-0002-6436-9347
Erdélyi, R
Journal name Astrophysical journal
Volume number 768
Issue number 1
Article ID 17
Start page 1
End page 11
Total pages 11
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2013-05-01
ISSN 0004-637X
1538-4357
Keyword(s) magnetohydrodynamics (MHD)
Sun: chromosphere
Sun: photosphere
waves
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Summary Observing the excitation mechanisms of incompressible transverse waves is vital for determining how energy propagates through the lower solar atmosphere. We aim to show the connection between convectively driven photospheric flows and incompressible chromospheric waves. The observations presented here show the propagation of incompressible motion through the quiet lower solar atmosphere, from the photosphere to the chromosphere. We determine photospheric flow vectors to search for signatures of vortex motion and compare results to photospheric flows present in convective simulations. Further, we search for the chromospheric response to vortex motions. Evidence is presented that suggests incompressible waves can be excited by the vortex motions of a strong magnetic flux concentration in the photosphere. A chromospheric counterpart to the photospheric vortex motion is also observed, presenting itself as a quasi-periodic torsional motion. Fine-scale, fibril structures that emanate from the chromospheric counterpart support transverse waves that are driven by the observed torsional motion. A new technique for obtaining details of transverse waves from time-distance diagrams is presented and the properties of transverse waves (e.g., amplitudes and periods) excited by the chromospheric torsional motion are measured.
Language eng
DOI 10.1088/0004-637X/768/1/17
Field of Research 0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2013, The American Astronomical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30114955

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