Record-breaking coronal magnetic field in solar active region 12673
arXiv:1907.06398 · doi:10.3847/2041-8213/ab3042
Abstract
At the Sun, the strongest magnetic fields are routinely detected at dark sunspots. The magnitude of the field is typically about 3000 G, with only a few exceptions that reported the magnetic field in excess of 5000 G. Given that the magnetic field decreases with height in the solar atmosphere, no coronal magnetic field above ~2000 G was ever reported. Here, we present imaging microwave observations of an anomalously strong magnetic field of about 4000 G at the base of the corona in solar active region NOAA 12673 on 06 September 2017. Combining the photospheric vector measurements of the magnetic field and the coronal probing, we created and validated a nonlinear force-free field coronal model, with which we quantify the record-breaking coronal magnetic field at various coronal heights.
References in corpus (7)
- The Solar Optical Telescope for the Hinode Mission: An Overview
- Optimization code with weighting function for the reconstruction of coronal magnetic fields
- VFISV: Very Fast Inversion of the Stokes Vector for the Helioseismic and Magnetic Imager
- Block-induced complex structures building the flare-productive solar active region 12673
- Super-strong Magnetic Field in Sunspots
- Casting the Coronal Magnetic Field Reconstruction Tools in 3D Using MHD Bifrost Model
- Multi-wavelength study of a delta-spot I: A region of very strong, horizontal magnetic field
Cited by in corpus (19)
- Measurement of magnetic field and relativistic electrons along a solar flare current sheet
- Detection of the strongest magnetic field in a sunspot light bridge
- The effect of magnetic field on the damping of slow waves in the solar corona
- Energetic Electron Distribution of the Coronal Acceleration Region: First results from Joint Microwave and Hard X-ray Imaging Spectroscopy
- Non-LTE inversions of a confined X2.2 flare: I. Vector magnetic field in the photosphere and chromosphere
- Can Sub-photospheric Magnetic Reconnection Change the Elemental Composition in the Solar Corona?
- Coronal Magnetic Field Measurements along a Partially Erupting Filament in a Solar Flare
- Application of a magnetic-field-induced transition in Fe X to solar and stellar coronal magnetic field measurements
- Microwave Study of a Solar Circular Ribbon Flare
- Energy budget of plasma motions, heating, and electron acceleration in a three-loop solar flare
- Coronal Heating Law Constrained by Microwave Gyroresonant Emission
- Strongest coronal magnetic fields in solar cycles 23-24: probing, statistics, and implications
- Solar coronal magnetic field measurements using spectral lines available in Hinode/EIS observations: Strong and weak field techniques and temperature diagnostics
- The magnetic field environment of active region 12673 that produced the energetic particle events of September 2017
- X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat
- Observing the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA): Polarization Observations at 3 mm
- Non-thermal electron energization during the impulsive phase of an X9.3 flare revealed by Insight-HXMT
- Spatial extent of the magnetic influence of an active region on the solar atmosphere
- Forward Modeling of Solar Coronal Magnetic Field Measurements Based on a Magnetic-field-induced Transition in Fe X