@Article{ChianSiReRuGoKuPa:2020:LaChSa,
author = "Chian, Abraham Chian-Long and Silva, Suzana de Souza e Almeida and
Rempel, Erico Luiz and Rubio, Luis Ramon Bellot and Gosic, Milan
and Kussano, Kanya and Park, Sung-Hong",
affiliation = "{Nagoya University} and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica (ITA)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto de Astrof{\'{\i}}sica de
Andaluc{\'{\i}}a (CSIC)} and {Lockheed Martin Solar and
Astrophysics Laboratory} and {Nagoya University} and {Nagoya
University}",
title = "Lagrangian chaotic saddles and objective vortices in solar
plasmas",
journal = "Physical Review E",
year = "2020",
volume = "102",
number = "6",
pages = "e060201",
month = "Dec.",
abstract = "We report observational evidence of Lagrangian chaotic saddles in
plasmas, given by the intersections of finite-time unstable and
stable manifolds, using an \≈ 22 h sequence of spacecraft
images of the horizontal velocity field of solar photosphere. A
set of 29 persistent objective vortices with lifetimes varying
from 28.5 to 298.3 min are detected by computing the Lagrangian
averaged vorticity deviation. The unstable manifold of the
Lagrangian chaotic saddles computed for \≈ 11 h exhibits
twisted folding motions indicative of recurring vortices in a
magnetic mixed-polarity region. We show that the persistent
objective vortices are formed in the gap regions of Lagrangian
chaotic saddles at supergranular junctions.",
doi = "10.1103/PhysRevE.102.060201",
url = "http://dx.doi.org/10.1103/PhysRevE.102.060201",
issn = "1539-3755",
language = "en",
targetfile = "chian_lagrangian.pdf",
urlaccessdate = "20 maio 2024"
}