Multiple Stokes I inversions for inferring magnetic fields in the spectral range around Cr I 5782 angstrom

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548204" target="_blank" >RIV/67985815:_____/21:00548204 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202140596" target="_blank" >https://doi.org/10.1051/0004-6361/202140596</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202140596" target="_blank" >10.1051/0004-6361/202140596</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multiple Stokes I inversions for inferring magnetic fields in the spectral range around Cr I 5782 angstrom

Popis výsledku v původním jazyce

In this work, we explore the spectral window containing Fraunhofer lines formed in the solar photosphere, around the magnetically sensitive Cr i lines at 5780.9, 5781.1, 5781.7, 5783.0, and 5783.8 angstrom, with Lande g-factors between 1.6 and 2.5. The goal is to simultaneously analyze 15 spectral lines, comprising Cr i, Cu i, Fe i, Mn i, and Si i lines, without the use of polarimetry, to infer the thermodynamic and magnetic properties in strongly magnetized plasmas using an inversion code. The 15 simultaneously inverted intensity profiles (Stokes I) delivered accurate temperatures and Doppler velocities when compared with the simulations. The derived magnetic fields and inclinations achieve the best level of accuracy when the fields are oriented along the line-of-sight (LOS) and less accurate when the fields are transverse to the LOS. In general, the results appear similar to what is reported in the HMI vector-field data, although some discrepancies exist. The analyzed spectral range has the potential to deliver thermal, dynamic, and magnetic information for strongly magnetized features on the Sun, such as pores and sunspots, even without the use of polarimetry. The highest sensitivity of the lines is found in the lower photosphere, on average, around log tau = 1. The multiple-line inversions provide smooth results across the whole field of view (FOV). The presented spectral range and inversion strategy will be used for future VTT observing campaigns.

Název v anglickém jazyce

Multiple Stokes I inversions for inferring magnetic fields in the spectral range around Cr I 5782 angstrom

Popis výsledku anglicky

In this work, we explore the spectral window containing Fraunhofer lines formed in the solar photosphere, around the magnetically sensitive Cr i lines at 5780.9, 5781.1, 5781.7, 5783.0, and 5783.8 angstrom, with Lande g-factors between 1.6 and 2.5. The goal is to simultaneously analyze 15 spectral lines, comprising Cr i, Cu i, Fe i, Mn i, and Si i lines, without the use of polarimetry, to infer the thermodynamic and magnetic properties in strongly magnetized plasmas using an inversion code. The 15 simultaneously inverted intensity profiles (Stokes I) delivered accurate temperatures and Doppler velocities when compared with the simulations. The derived magnetic fields and inclinations achieve the best level of accuracy when the fields are oriented along the line-of-sight (LOS) and less accurate when the fields are transverse to the LOS. In general, the results appear similar to what is reported in the HMI vector-field data, although some discrepancies exist. The analyzed spectral range has the potential to deliver thermal, dynamic, and magnetic information for strongly magnetized features on the Sun, such as pores and sunspots, even without the use of polarimetry. The highest sensitivity of the lines is found in the lower photosphere, on average, around log tau = 1. The multiple-line inversions provide smooth results across the whole field of view (FOV). The presented spectral range and inversion strategy will be used for future VTT observing campaigns.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

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

653

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

12

Strana od-do

A165

Kód UT WoS článku

000701772700004

EID výsledku v databázi Scopus

2-s2.0-85116425770