A distinct magnetic property of the inner penumbral boundary: III. Analysis of simulated sunspots

0534079 - ASÚ 2021 RIV FR eng J - Článek v odborném periodiku
Jurčák, Jan - Schmassmann, M. - Rempel, M. - Gonzalez, N.B. - Schlichenmaier, R.
A distinct magnetic property of the inner penumbral boundary: III. Analysis of simulated sunspots.
Astronomy & Astrophysics. Roč. 638, June (2020), č. článku A28. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA ČR(CZ) GA18-06319S
GRANT EU: European Commission(XE) 824135 - SOLARNET
Institucionální podpora: RVO:67985815
Klíčová slova: Sun * sunspots * photosphere
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.803, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1051/0004-6361/202037852

We analyse the magnetic properties of the umbra-penumbra boundary in simulated sunspots and thus assess their similarity to observed sunspots. We also aim to investigate the role of the plasma beta and the ratio of kinetic to magnetic energy in simulated sunspots in the convective motions because these quantities cannot be reliably determined from observations.Methods. We used a set of non-gray simulation runs of sunspots with the MURaM code. The setups differed in terms of subsurface magnetic field structure and magnetic field boundary imposed at the top of the simulation domain. These data were used to synthesize the Stokes profiles, which were then degraded to the Hinode spectropolarimeter-like observations. Then, the data were treated like real Hinode observations of a sunspot, and magnetic properties at the umbral boundaries were determined.
Trvalý link: http://hdl.handle.net/11104/0312300