0470667 - ASÚ 2017 RIV FR eng J - Journal Article
Borrero, J.M. - Asensio Ramos, A. - Collados Vera, M. - Schlichenmaier, R. - Balthasar, H. - Franz, M. - Rezaei, R. - Kiess, C. - Orozco Suárez, D. - Pastor Yabar, A. - Berkefeld, T. - von der Lühe, O. - Schmidt, D. - Schmidt, W. - Sigwarth, M. - Soltau, D. - Volkmer, R. - Waldmann, T.A. - Denker, C. - Hofmann, A. - Staude, J. - Strassmeier, K.G. - Feller, A. - Lagg, A. - Solanki, S.K. - Sobotka, Michal - Nicklas, H.
Deep probing of the photospheric sunspot penumbra: no evidence of field-free gaps.
Astronomy & Astrophysics. Roč. 596, December (2016), A2/1-A2/14. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:67985815
Keywords : sunspots * Sun * infrared
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.014, year: 2016 ; AIS: 1.581, rok: 2016
DOI: https://doi.org/10.1051/0004-6361/201628313

We aim to confirm or refute the existence of weak-field regions in the deepest photospheric layers of the penumbra. At log tau(5) = 0 we find no evidence of regions with dynamically weak (B < 500 Gauss) magnetic fields in sunspot penumbrae. This result is much more reliable than previous investigations made on Fe I lines at 630 nm. Moreover, the result is independent of the number of nodes employed in the inversion, is independent of the point spread function used to deconvolve the data, and does not depend on the amount of stray light (i.e., wide-angle scattered light) considered.

Permanent Link: http://hdl.handle.net/11104/0268236