Determining the Magnetic Field of Active Region Plages Using the Whole CLASP2/2.1 Spectral Window
Year: 2025
Type: article
Abstract: The Chromospheric LAyer SpectroPolarimeter missions, CLASP2 and CLASP2.1, demonstrated that the near-UV spectral region between 279.30 and 280.68 nm is suitable for studying the magnetism of the solar chromosphere. In particular, the spectropolarimetric observations in the Mg ii h and k resonant doublet, Mn i 279.91 and 280.19 nm resonant lines, and Fe ii 279.79 and 280.66 nm lines acquired by these suborbital space experiments have been proven useful for inferring the magnetic field stratification in the solar chromosphere. However, several lines of the CLASP2/2.1 spectral region with significant circular polarization signals had remained unexplored. After identifying two Ni i (279.95 and 280.59 nm) lines, one Mn ii (280.62 nm) line, and one Fe i (280.53 nm) line, here we apply the weak-field approximation to the spectropolarimetric observations of active region plages by CLASP2 and CLASP2.1. By comparing the results with previous studies, we are able to estimate the formation heights of these CLASP2/2.1 additional spectral lines and to demonstrate their suitability to determine the magnetic field stratification from the photosphere to the upper chromosphere.
Source: The Astrophysical Journal
Authors: David Afonso Delgado, Tanausú del Pino Alemán, Javier Trujillo Bueno, Ryohko Ishikawa, Ernest Alsina Ballester, David E. McKenzie, Luca Belluzzi, Christian Bethge, Ken Kobayashi, Takenori J. Okamoto, Laurel A. Rachmeler, Donguk Song, Jiří Štěpán, Bart de Pontieu, Adam R. Kobelski, Genevieve D. Vigil, Frédéric Auchère, Ryouhei Kano, Amy Winebarger
Institutions: Universidad de La Laguna, Instituto de Astrofísica de Canarias, Consejo Superior de Investigaciones Científicas, National Astronomical Observatory of Japan, Marshall Space Flight Center, Institut für Sonnenphysik, Istituto Ricerche Solari Locarno, Università della Svizzera italiana, Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, National Oceanic and Atmospheric Administration, NOAA National Centers for Environmental Information, Korea Astronomy and Space Science Institute, Czech Academy of Sciences, Astronomical Institute, Lockheed Martin (United States), University of Oslo, Institut d'Astrophysique Spatiale
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Science Foundation, National Aeronautics and Space Administration, Ministerio de Ciencia, Innovación y Universidades, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Centre National d’Etudes Spatiales, Universitetet i Oslo, National Astronomical Observatory of Japan, Marshall Space Flight Center, Japan Society for the Promotion of Science, Japan Aerospace Exploration Agency, European Regional Development Fund, Agencia Estatal de Investigación, Advanced Scientific Computing Research, H2020 European Research Council, NextGenerationEU
Awards: G1105844351, G1175115578, G1335240794, G1660683788, G1758961134, Demonstration of UV Spectro-Polarimetery as a Solar Magnetic Field Diagnostics Tool by Sounding Rocket Experiment, G2067964119, G2262748287, The Management and Operation of the National Center for Atmoshperic Research (NCAR), Kognitive Prozesse der Textproduktion., G2601397997, G300979063, G3135542723, G3275705967, G3480869486, G3681454997, G4042783231, G410571670, Polarized Radiation Diagnostics for Exploring the Magnetism of the Outer Solar Atmosphere, G4212894969, G425668148, G434337789, G451917667, HPC-techniques for 3D modeling of resonance line polarization with PRD, Approach to understand the solar coronal and chromospheric heating --- from Hinode, IRIS & CLASP to SOLAR-C, G491712853, G5037504474, G5080475149, G5195188938, G5199606742, G5539308778, G5635532810, G5967599077, G6162676347, 新しい方法論によるラジカル反応の研究, G6984531298, G7084143925, G7188124709, G724704087, 古代説話における諸寺縁起の研究, G7642878578, G7736885172, G7805626310, G7863371703, G8497050386, G8549000936
OpenAlex ID: W4414520118