Penumbral decay observed in active region NOAA 12585
نویسندگان
چکیده
Context. The physical conditions leading the sunspot penumbra decay are poorly understood so far. Aims. We investigate photospheric magnetic and velocity properties of a during phase to advance current knowledge this process. Methods. A penumbral was observed with CRISP instrument at Swedish 1 m Solar Telescope on 2016 September 4 5 in active region NOAA 12585. During these days, full-Stokes spectropolarimetric scans along Fe I 630 nm line pair were acquired over more than one hour. inverted observations VFISV code obtain evolution properties. complement study data from instruments board Dynamics Observatory Hinode space missions. Results. studied disappears progressively time space. flux seems be linked presence moving features (MMFs). Decreasing Stokes V signals observed. Evershed flows horizontal fields detected even after disappearance sector. Conclusions. analyzed result interaction between opposite polarity type III MMFs penumbra, while overlying canopies regulates different sectors.
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2021
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202141034