Flow and magnetic field properties in the trailing sunspots of active region NOAA 12396

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00470581" target="_blank" >RIV/67985815:_____/16:00470581 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1002/asna.201612447" target="_blank" >http://dx.doi.org/10.1002/asna.201612447</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/asna.201612447" target="_blank" >10.1002/asna.201612447</a>

Result language

angličtina

Original language name

Flow and magnetic field properties in the trailing sunspots of active region NOAA 12396

Original language description

Improved measurements of the photospheric and chromospheric three-dimensional magnetic and flow fields are crucial for a precise determination of the origin and evolution of active regions. We present an illustrative sample of multi-instrument data acquired during a two-week coordinated observing campaign in August 2015 involving, among others, the GREGOR solar telescope (imaging and near-infrared spectroscopy) and the space missions Solar Dynamics Observatory (SDO) and Interface Region Imaging Spectrograph (IRIS). The observations focused on the trailing part of active region NOAA 12396 with complex polarity inversion lines and strong intrusions of opposite polarity flux. The GREGOR Infrared Spectrograph (GRIS) provided Stokes IQUV spectral profiles in the photospheric Si i.1082.7 nm line, the chromospheric He I lambda 1083.0 nm triplet, and the photospheric Ca I lambda 1083.9 nm line. Carefully calibrated GRIS scans of the active region provided maps of Doppler velocity and magnetic field at different atmospheric heights. We compare quick-look maps with those obtained with the " Stokes Inversions based on Response functions" (SIR) code, which furnishes deeper insight into the magnetic properties of the region. We find supporting evidence that newly emerging flux and intruding opposite polarity flux are hampering the formation of penumbrae, i.e., a penumbra fully surrounding a sunspot is only expected after cessation of flux emergence in proximity to the sunspots.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Astronomische Nachrichten

ISSN

0004-6337

e-ISSN

—

Volume of the periodical

337

Issue of the periodical within the volume

10

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

1090-1098

UT code for WoS article

000391297900016

EID of the result in the Scopus database

2-s2.0-84997606062