The magnetic nature of umbra-penumbra boundary in sunspots

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985556%3A_____%2F18%3A00495019" target="_blank" >RIV/67985556:_____/18:00495019 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/18:00495019

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201732528" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201732528</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201732528" target="_blank" >10.1051/0004-6361/201732528</a>

Result language

angličtina

Original language name

The magnetic nature of umbra-penumbra boundary in sunspots

Original language description

We aim at studying the magnetic nature of umbra-penumbra boundaries in sunspots of different sizes, morphologies, evolutionary stages, and phases of the solar cycle. We statistically prove that the umbra-penumbra boundary in stable sunspots is characterised by an invariant value of the vertical magnetic field component: the vertical component of the magnetic field strength does not depend on the umbra size, its morphology, and phase of the solar cycle. With the statistical Bayesian inference, we find that the strength of the vertical magnetic field component is, with a likelihood of 99%, in the range of 1849-1885 G with the most probable value of 1867 G. In contrast, the magnetic field strength and inclination averaged along individual boundaries are found to be dependent on the umbral size: the larger the umbra, the stronger and more horizontal the magnetic field at its boundary.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

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Volume of the periodical

611

Issue of the periodical within the volume

March

Country of publishing house

FR - FRANCE

Number of pages

13

Pages from-to

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UT code for WoS article

000428422500001

EID of the result in the Scopus database

2-s2.0-85044724208