Three-dimensional structure of a sunspot light bridge

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00470619" target="_blank" >RIV/67985815:_____/16:00470619 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/16:00488879
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201629586" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201629586</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201629586" target="_blank" >10.1051/0004-6361/201629586</a>

Result language
angličtina
Original language name
Three-dimensional structure of a sunspot light bridge
Original language description
Active regions are the most prominent manifestations of solar magnetic fields their generation and dissipation are fundamental problems in solar physics. Light bridges are commonly present during sunspot decay, but a comprehensive picture of their role in the removal of the photospheric magnetic field is still lacking. We study the three-dimensional configuration of a sunspot, and in particular, its light bridge, during one of the last stages of its decay.The sunspot shows a light bridge with penumbral continuum intensity that separates the central umbra from a smaller umbra. We find that in this region the magnetic field lines form a canopy with lower magnetic field strength in the inner part. The photospheric light bridge is dominated by gas pressure (high-beta), as opposed to the surrounding umbra, where the magnetic pressure is higher. A convective flow is observed in the light bridge. This flow is able to bend the magnetic field lines and to produce field reversals. The field lines merge above the light bridge and become as vertical and strong as in the surrounding umbra. We conclude that this occurs because two highly magnetized regions approach each other during the sunspot evolution.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/7E13003" target="_blank" >7E13003: High-Resolution Solar Physics Network</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)