The relation between magnetic field inclination and the apparent motion of penumbral grains

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00584409" target="_blank" >RIV/67985815:_____/24:00584409 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/24:10468264

Result on the web

<a href="https://hdl.handle.net/11104/0353681" target="_blank" >https://hdl.handle.net/11104/0353681</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202347979" target="_blank" >10.1051/0004-6361/202347979</a>

Result language

angličtina

Original language name

The relation between magnetic field inclination and the apparent motion of penumbral grains

Original language description

We aim to ascertain statistically whether the direction of PGs' apparent motion is related to the inclination of the surrounding magnetic field. We used spectropolarimetric observations of five sunspot penumbrae to compare magnetic inclinations inside PGs with those in their surroundings. The data were taken by three observatories: the Hinode satellite, the Swedish Solar Telescope, and the GREGOR solar telescope. The direction of PGs' motion was determined by feature tracking. The atmospheric conditions in PGs and their surroundings, including magnetic field information, were retrieved by means of height-stratified spectropolarimetric inversions. Out of a sample of 444 inward-moving PGs and 269 outward-moving ones, we show that 43% of the inward-moving PGs have a magnetic inclination larger by 8 degrees +/- 4 degrees than the inclination in their surroundings and 51% of the outward-moving PGs have an inclination smaller by 13 degrees +/- 7 degrees than the surrounding one. The opposite relation of inclinations is observed in only one fifth of the inward- and outward-moving PGs. Rising hot plasma in PGs surrounded by a less inclined magnetic field may adapt its trajectory to be more vertical, causing an inward apparent motion of PGs. Conversely, it may be dragged by a more horizontal surrounding magnetic field such that an outward apparent motion is observed.

Czech name

—

Czech description

—

Type

J_imp - 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/GF23-07633K" target="_blank" >GF23-07633K: Unveiling the principles of solar magneto-convection</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Volume of the periodical

682

Issue of the periodical within the volume

February

Country of publishing house

FR - FRANCE

Number of pages

7

Pages from-to

A65

UT code for WoS article

001163661400001

EID of the result in the Scopus database

2-s2.0-85183995982