All Outputs (5)

A complete topological invariant for braided magnetic fields (2014)
Journal Article
Yeates, A., & Hornig, G. (2014). A complete topological invariant for braided magnetic fields. Journal of Physics: Conference Series, 544(1), Article 012002. https://doi.org/10.1088/1742-6596/544/1/012002

A topological flux function is introduced to quantify the topology of magnetic braids: non-zero line-tied magnetic fields whose field lines all connect between two boundaries. This scalar function is an ideal invariant defined on a cross-section of t... Read More about A complete topological invariant for braided magnetic fields.

Observations of a hybrid double-streamer/pseudostreamer in the solar corona (2014)
Journal Article
Rachmeler, L., Platten, S., Bethge, C., Seaton, D., & Yeates, A. (2014). Observations of a hybrid double-streamer/pseudostreamer in the solar corona. Astrophysical Journal Letters, 787(1), https://doi.org/10.1088/2041-8205/787/1/l3

We report on the first observation of a single hybrid magnetic structure that contains both a pseudostreamer and a double streamer. This structure was originally observed by the SWAP instrument on board the PROBA2 satellite between 2013 May 5 and 10.... Read More about Observations of a hybrid double-streamer/pseudostreamer in the solar corona.

On the helicity of open magnetic fields (2014)
Journal Article
Prior, C., & Yeates, A. (2014). On the helicity of open magnetic fields. Astrophysical Journal, 787(2), Article 100. https://doi.org/10.1088/0004-637x/787/2/100

We reconsider the topological interpretation of magnetic helicity for magnetic fields in open domains, and relate this to the relative helicity. Specifically, our domains stretch between two parallel planes, and each of these ends may be magnetically... Read More about On the helicity of open magnetic fields.

The coronal energy input from magnetic braiding (2014)
Journal Article
Yeates, A., Bianchi, F., Welsh, B., & Bushby, P. (2014). The coronal energy input from magnetic braiding. Astronomy & Astrophysics, 564, Article A131. https://doi.org/10.1051/0004-6361/201323276

We estimate the energy input into the solar corona from photospheric footpoint motions, using observations of a plage region by the Hinode Solar Optical Telescope. Assuming a perfectly ideal coronal evolution, two alternative lower bounds for the Poy... Read More about The coronal energy input from magnetic braiding.

Detection of coherent structures in photospheric turbulent flows (2014)
Journal Article
Chian, A., Rempel, E., Aulanier, G., Schmieder, B., Shadden, S., Welsch, B., & Yeates, A. (2014). Detection of coherent structures in photospheric turbulent flows. Astrophysical Journal, 786(1), https://doi.org/10.1088/0004-637x/786/1/51

We study coherent structures in solar photospheric flows in a plage in the vicinity of the active region AR 10930 using the horizontal velocity data derived from Hinode/Solar Optical Telescope magnetograms. Eulerian and Lagrangian coherent structures... Read More about Detection of coherent structures in photospheric turbulent flows.