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Solar magnetic field and its influence on solar variability and activity

Total Cost €


EC-Contrib. €






Project "SOLMAG" data sheet

The following table provides information about the project.


Organization address
postcode: 80539
website: n.a.

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Project website
 Total cost 2˙418˙750 €
 EC max contribution 2˙418˙750 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-AdG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-10-01   to  2021-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

For life on Earth, the Sun is the most important astrophysical object in the universe. For astrophysicists, the atmosphere of the Sun presents an intriguing, complex and extremely varied environment generated by continuous dynamic, small-scale interactions between plasma and intricately structured magnetic fields. The purpose of this proposal is to elucidate the physics underlying the structure and dynamics of the solar magnetic field that is responsible for the Sun’s varied activity and its variability. This goal is to be achieved by following an integral approach combining new observational facilities, novel instruments developed in the group of the PI, the next generation of inversion techniques for data analysis and state-of-the-art magnetohydrodynamic simulations. This wide range of expertise present in the group of the PI is unique and well suited to such an approach. The research proposed here will provide measurements of the Sun’s magnetic field at high spatial and temporal resolution at unprecedented sensitivity to Zeeman splitting and to magnetic flux. Also, the use of a novel polarimetric hyperspectral imager, combined with the next generation of inversion techniques will allow following the 3D structure of the magnetic field and of other physical parameters in time through a sequence of snapshots. This will enable following the build-up of magnetic tension and of waves following the field lines and will set important constraints on the heating mechanism of the solar chromosphere and corona. The proposed work, in particular the comparison of measurements with simulations, will also set constraints on the presence and properties of a small-scale turbulent dynamo as well as other fundamental physical processes taking place in the solar atmosphere. The techniques introduced here will enable reliable and robust measurements of chromospheric magnetic fields, shedding new light on this enigmatic but centrally important layer of the solar atmosphere.


year authors and title journal last update
List of publications.
2019 D. Buehler, A. Lagg, M. van Noort, S. K. Solanki
A comparison between solar plage and network properties
published pages: A86, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833585
Astronomy & Astrophysics 630 2019-11-13
2019 I. Milić, H. N. Smitha, A. Lagg
Using the infrared iron lines to probe solar subsurface convection
published pages: A133, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201935126
Astronomy & Astrophysics 630 2019-11-13
2017 T. Oba, T. L. Riethmüller, S. K. Solanki, Y. Iida, C. Quintero Noda, T. Shimizu
The Small-scale Structure of Photospheric Convection Retrieved by a Deconvolution Technique Applied to Hinode /SP Data
published pages: 7, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aa8e44
The Astrophysical Journal 849/1 2019-07-26
2018 A. L. Siu-Tapia, M. Rempel, A. Lagg, S. K. Solanki
Evershed and Counter-Evershed Flows in Sunspot MHD Simulations
published pages: 66, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aaa007
The Astrophysical Journal 852/2 2019-07-26
2017 Kok Leng Yeo, Sami K. Solanki, Charlotte M. Norris, Benjamin Beeck, Yvonne C. Unruh, Natalie A. Krivova
Solar Irradiance Variability is Caused by the Magnetic Activity on the Solar Surface
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.119.091102
Physical Review Letters 119/9 2019-07-26
2018 Hui Tian, Vasyl Yurchyshyn, Hardi Peter, Sami K. Solanki, Peter R. Young, Lei Ni, Wenda Cao, Kaifan Ji, Yingjie Zhu, Jingwen Zhang, Tanmoy Samanta, Yongliang Song, Jiansen He, Linghua Wang, Yajie Chen
Frequently Occurring Reconnection Jets from Sunspot Light Bridges
published pages: 92, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aaa89d
The Astrophysical Journal 854/2 2019-07-26
2017 H. N. Smitha, S. K. Solanki
Probing photospheric magnetic fields with new spectral line pairs
published pages: A111, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201731261
Astronomy & Astrophysics 608 2019-07-26
2018 C. Quintero Noda, G. L. Villanueva, Y. Katsukawa, S. K. Solanki, D. Orozco Suárez, B. Ruiz Cobo, T. Shimizu, T. Oba, M. Kubo, T. Anan, K. Ichimoto, Y. Suematsu
Solar polarimetry in the K I D 2 line : A novel possibility for a stratospheric balloon
published pages: A79, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201732111
Astronomy & Astrophysics 610 2019-07-26
2018 F. Zeuner, A. Feller, F. A. Iglesias, S. K. Solanki
Detection of spatially structured scattering polarization of Sr I 4607.3 Ã… with the Fast Solar Polarimeter
published pages: A179, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833241
Astronomy & Astrophysics 619 2019-07-26
2019 T. L. Riethmüller, S. K. Solanki
The potential of many-line inversions of photospheric spectropolarimetric data in the visible and near UV
published pages: A36, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833379
Astronomy & Astrophysics 622 2019-07-26
2018 S. J. González Manrique, C. Kuckein, M. Collados, C. Denker, S. K. Solanki, P. Gömöry, M. Verma, H. Balthasar, A. Lagg, A. Diercke
Temporal evolution of arch filaments as seen in He I 10 830 Å
published pages: A55, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201832684
Astronomy & Astrophysics 617 2019-07-26
2018 Jingwen Zhang, Hui Tian, Sami K. Solanki, Haimin Wang, Hardi Peter, Kwangsu Ahn, Yan Xu, Yingjie Zhu, Wenda Cao, Jiansen He, Linghua Wang
Dark Structures in Sunspot Light Bridges
published pages: 29, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aada0a
The Astrophysical Journal 865/1 2019-07-26
2018 B. Löptien, A. Lagg, M. van Noort, S. K. Solanki
Measuring the Wilson depression of sunspots using the divergence-free condition of the magnetic field vector
published pages: A42, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833571
Astronomy & Astrophysics 619 2019-07-26
2018 H. N. Smitha, L. P. Chitta, T. Wiegelmann, S. K. Solanki
Observations of solar chromospheric heating at sub-arcsec spatial resolution
published pages: A128, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833276
Astronomy & Astrophysics 617 2019-07-26
2018 K. Barczynski, H. Peter, L. P. Chitta, S. K. Solanki
Emission of solar chromospheric and transition region features related to the underlying magnetic field
published pages: A5, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201731650
Astronomy & Astrophysics 619 2019-07-26
2018 L. P. Chitta, H. Peter, S. K. Solanki
Nature of the energy source powering solar coronal loops driven by nanoflares
published pages: L9, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201833404
Astronomy & Astrophysics 615 2019-07-26

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