Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE). I. Coronal Heating

De Pontieu, Bart, Testa, Paola, Martínez-Sykora, Juan, Antolin, Patrick, Karampelas, Konstantinos, Hansteen, Viggo, Rempel, Matthias, Cheung, Mark C. M., Reale, Fabio, Danilovic, Sanja, Pagano, Paolo, Polito, Vanessa, De Moortel, Ineke, Nóbrega-Siverio, Daniel, Van Doorsselaere, Tom, Petralia, Antonino, Asgari-Targhi, Mahboubeh, Boerner, Paul, Carlsson, Mats, Chintzoglou, Georgios, Daw, Adrian, DeLuca, Edward, Golub, Leon, Matsumoto, Takuma, Ugarte-Urra, Ignacio, McIntosh, Scott W. and the MUSE team, (2022) Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE). I. Coronal Heating. The Astrophysical Journal, 926 (1). p. 52. ISSN 0004-637X

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The Multi-slit Solar Explorer (MUSE) is a proposed mission composed of a multislit extreme ultraviolet (EUV) spectrograph (in three spectral bands around 171 Å, 284 Å, and 108 Å) and an EUV context imager (in two passbands around 195 Å and 304 Å). MUSE will provide unprecedented spectral and imaging diagnostics of the solar corona at high spatial (≤0.″5) and temporal resolution (down to ∼0.5 s for sit-and-stare observations), thanks to its innovative multislit design. By obtaining spectra in four bright EUV lines (Fe ix 171 Å, Fe xv 284 Å, Fe xix–Fe xxi 108 Å) covering a wide range of transition regions and coronal temperatures along 37 slits simultaneously, MUSE will, for the first time, “freeze” (at a cadence as short as 10 s) with a spectroscopic raster the evolution of the dynamic coronal plasma over a wide range of scales: from the spatial scales on which energy is released (≤0.″5) to the large-scale (∼170″ × 170″) atmospheric response. We use numerical modeling to showcase how MUSE will constrain the properties of the solar atmosphere on spatiotemporal scales (≤0.″5, ≤20 s) and the large field of view on which state-of-the-art models of the physical processes that drive coronal heating, flares, and coronal mass ejections (CMEs) make distinguishing and testable predictions. We describe the synergy between MUSE, the single-slit, high-resolution Solar-C EUVST spectrograph, and ground-based observatories (DKIST and others), and the critical role MUSE plays because of the multiscale nature of the physical processes involved. In this first paper, we focus on coronal heating mechanisms. An accompanying paper focuses on flares and CMEs.

Item Type: Article
Additional Information: Funding information: Some of this work was also supported by NASA contract NNG09FA40C (IRIS) and NASA grants 19-HTMS19_2-0025 “Flux emergence and the structure, dynamics, and energetics of the solar atmosphere”, 80NSSC18K1285, and 80NSSC21K0737. P.A. acknowledges funding from the STFC Ernest Rutherford Fellowship (No. ST/R004285/2). K.K. acknowledges funding from an STFC grant (No. ST/T000384/1) and by an FWO (Fonds voor Wetenschappelijk Onderzoek—Vlaanderen) postdoctoral fellowship (1273221N). D.N.S. acknowledges funding from the Synergy Grant number 810218 (ERC 2018-SyG) of the European Research Council, and the project PGC2018 095832-B-I00 of the Spanish Ministry of Science, Innovation and Universities. S.D. is supported by a grant from the Swedish Civil Contingencies Agency (MSB) and the Knut and Alice Wallenberg foundation (2016.0019). I.D. M. has received support from the UK Science and Technology Facilities Council (Consolidated grant ST/K000950/1), the European Union Horizon 2020 research and innovation program (grant agreement No. 647214), and the Research Council of Norway through its Centres of Excellence scheme, project number 262622. T.V.D. was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No 724326) and the C1 grant TRACEspace of Internal Funds KU Leuven.
Uncontrolled Keywords: Solar coronal heating, Theoretical models, Solar instruments
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 14 Feb 2022 15:40
Last Modified: 15 Feb 2022 09:15

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