Mapping Solar Magnetic Fields from the Photosphere to the Base of the Corona
Ryohko Ishikawa,Javier Trujillo Bueno,Tanausú del Pino Alemán,Takenori J. Okamoto,David E. McKenzie,Frédéric Auchère,Ryouhei Kano,Donguk Song,Masaki Yoshida,Laurel A. Rachmeler,Ken Kobayashi,Hirohisa Hara,Masahito Kubo,Noriyuki Narukage,Taro Sakao,Toshifumi Shimizu,Yoshinori Suematsu,Christian Bethge,Bart De Pontieu,Alberto Sainz Dalda,Genevieve D. Vigil,Amy R. Winebarger,Ernest Alsina Ballester,Luca Belluzzi,Jiri Stepan,Andrés Asensio Ramos,Mats Carlsson,Jorrit Leenaarts +27 more
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TLDR
In this paper, the magnetic field from the photosphere to the very upper chromosphere of the Sun has been inferred from spectropolarimetric observations of an active region plage and its surrounding enhanced network.Abstract:
Routine ultraviolet imaging of the Sun's upper atmosphere shows the spectacular manifestation of solar activity; yet we remain blind to its main driver, the magnetic field. Here we report unprecedented spectropolarimetric observations of an active region plage and its surrounding enhanced network, showing circular polarization in ultraviolet (Mg II $h$ & $k$ and Mn I) and visible (Fe I) lines. We infer the longitudinal magnetic field from the photosphere to the very upper chromosphere. At the top of the plage chromosphere the field strengths reach more than 300 gauss, strongly correlated with the Mg II $k$ line core intensity and the electron pressure. This unique mapping shows how the magnetic field couples the different atmospheric layers and reveals the magnetic origin of the heating in the plage chromosphere.read more
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Measuring the magnetic origins of solar flares, CMEs and Space Weather
Philip G. Judge,Matthias Rempel,Rana Ezzeddine,Lucia Kleint,Ricky Egeland,Svetlana V. Berdyugina,Thomas E. Berger,Joan Burkepile,Rebecca Centeno,Giuliana de Toma,Mausumi Dikpati,Yuhong Fan,Holly Gilbert,D. Lacatus +13 more
TL;DR: In this article, the authors identify a region in the near UV part of the spectrum as optimal for studying the development of magnetic free energy over active regions using data from SORCE, Hubble Space Telescope, and SKYLAB, along with 1D computations of the near-UV (NUV) spectrum and numerical experiments based on the MURaM radiation-MHD and HanleRT radiative transfer codes.
Journal ArticleDOI
Magnetic Field Diagnostics in the Solar Upper Atmosphere
TL;DR: The magnetic field is the main driver of the activity in the solar upper atmosphere, but its measurement is notoriously difficult as discussed by the authors , which is why a number of recent advances have activated the development of this research field.
Journal ArticleDOI
Quiet Sun Center to Limb Variation of the Linear Polarization Observed by CLASP2 Across the Mg ii h and k Lines
Laurel A. Rachmeler,J. Trujillo Bueno,David E. McKenzie,Ryo Ishikawa,F. Auchère,Ken Kobayashi,Ryohei Kano,Takenori J. Okamoto,Christian Bethge,Donguk Song,Ernest Alsina Ballester,Luca Belluzzi,T. del Pino Alemán,A. Asensio Ramos,Michitoshi Yoshida,T. Taro Shimizu,Amy R. Winebarger,A. Kobelski,Genevieve D. Vigil,B. De Pontieu,Noriyuki Narukage,M. Kubo,Taro Sakao,Hirohisa Hara,Yoshinori Suematsu,Jiri Stepan,T Carlsson,Jorrit Leenaarts +27 more
TL;DR: In this paper , the center-to-limb variation of the linear polarization across these resonance lines, which is produced by the scattering of anisotropic radiation in the solar atmosphere, is analyzed.
Journal ArticleDOI
Spatio-temporal analysis of chromospheric heating in a plage region
TL;DR: In this article , the authors estimate the chromospheric heating terms from a multi-line high-spatial-resolution plage dataset, characterize their spatio-temporal distribution and set constraints on the heating processes that are at work in the chromosphere.
Journal ArticleDOI
Measurements of Photospheric and Chromospheric Magnetic Field Structures Associated with Chromospheric Heating over a Solar Plage Region
Tetsu Anan,Thomas A. Schad,Reizaburo Kitai,Gabriel I. Dima,Sarah A. Jaeggli,Lucas A. Tarr,Manuel Collados,Carlos Dominguez-Tagle,Lucia Kleint +8 more
TL;DR: In this paper, the authors observed a plage region with the He I 1083.0 nm and Si I 1082.7 nm lines on 2018 October 3 using the integral field unit mode of the GREGOR Infrared Spectrograph (GRIS) installed at the GreGOR telescope.
References
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The Solar Optical Telescope for the Hinode Mission: An Overview
Saku Tsuneta,Kiyoshi Ichimoto,Yukio Katsukawa,Shin Nagata,Masashi Otsubo,Toshifumi Shimizu,Yoshinori Suematsu,Masao Nakagiri,M. Noguchi,T. D. Tarbell,A. M. Title,R. A. Shine,W. Rosenberg,C. Hoffmann,B. Jurcevich,Gary D. Kushner,M. Levay,Bruce W. Lites,D. F. Elmore,Tadashi Matsushita,Noboru Kawaguchi,H. Saito,Izumi Mikami,L. D. Hill,J. K. Owens +24 more
TL;DR: The solar optical telescope (SOT) as discussed by the authors is a 50-cm diffraction-limited Gregorian telescope with the Stokes Spectro-Polarimeter (SP) attached to it.