edu.ucar.opensky::articles:27291 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:47:14.908842 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d75t3qq6 https://doi.org/10.5281/zenodo.5139156 https Related Software #1 Ultimate fast gyrosynchrotron codes: the first release https://doi.org/10.5281/zenodo.7382624 https Related Software #2 P-AIRCARS (Polarimetry using Automated Imaging Routine for Compact Arrays of the Radio Sun) Spectropolarimetric radio imaging of faint Gyrosynchrotron emission from a CME: A possible indication of the insufficiency of homogeneous models 2024-06-01T00:00:00Z publication https://n2t.org/ark:/85065/d75t3qq6 https://doi.org/10.3847/1538-4357/ad43e9 Kansabanik, Devojyoti author Mondal, S. author Oberoi, D. author UCAR/NCAR - Library publisher The geo-effectiveness of coronal mass ejections (CMEs) is determined primarily by their magnetic fields. Modeling of gyrosynchrotron (GS) emission is a promising remote sensing technique to measure the CME magnetic field at coronal heights. However, faint GS emission from CME flux ropes is hard to detect in the presence of bright solar emission from the solar corona. With high dynamic-range spectropolarimetric meter wavelength solar images provided by the Murchison Widefield Array, we have detected faint GS emission from a CME out to similar to 8.3 R circle dot, the largest heliocentric distance reported to date. High-fidelity polarimetric calibration also allowed us to robustly detect circularly polarized emission from GS emission. For the first time in the literature, Stokes V detection has jointly been used with Stokes I spectra to constrain GS models. One expects that the inclusion of polarimetric measurement will provide tighter constraints on the GS model parameters. Instead, we found that homogeneous GS models, which have been used in all prior works, are unable to model both the total intensity and circular polarized emission simultaneously. This strongly suggests the need for using inhomogeneous GS models to robustly estimate the CME magnetic field and plasma parameters. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation