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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10468264

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GF23-07633K" target="_blank" >GF23-07633K: Odhalování principů konvekce v magnetických polích Slunce</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

682

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

A65

Kód UT WoS článku

001163661400001

EID výsledku v databázi Scopus

2-s2.0-85183995982