Orphan penumbrae: Submerging horizontal fields
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00429420" target="_blank" >RIV/67985815:_____/14:00429420 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201322340" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201322340</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201322340" target="_blank" >10.1051/0004-6361/201322340</a>
Alternative languages
Result language
angličtina
Original language name
Orphan penumbrae: Submerging horizontal fields
Original language description
We investigate the properties of orphan penumbrae, which are photospheric filamentary structures observed in active regions near polarity inversion lines that resemble the penumbra of regular sunspots but are not connected to any umbra. Orphan penumbraeform between regions of opposite polarity in places with horizontal magnetic fields. Their magnetic configuration is that of Omega-shaped flux ropes. In the two cases studied here, the opposite-polarity regions approach each other with time and the wholestructure submerges as the penumbral filaments disappear. Orphan penumbrae are very similar to regular penumbrae, including the existence of strong gas flows. Therefore, they could have a similar origin. The main difference between them is the absence of a "background" magnetic field in orphan penumbrae. This could explain most of the observed differences. The fast flows we detect in orphan penumbrae may be caused by the siphon flow mechanism. Based on the similarities between orphan an
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP209%2F12%2F0287" target="_blank" >GAP209/12/0287: Spectropolarimetric analysis of solar photosphere</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
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Volume of the periodical
564
Issue of the periodical within the volume
April
Country of publishing house
FR - FRANCE
Number of pages
15
Pages from-to
"A91/1"-"A91/15"
UT code for WoS article
000334671000091
EID of the result in the Scopus database
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