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1. Parker Solar Probe Enters the Magnetically Dominated Solar Corona

   https://doi.org/10.1103/PhysRevLett.127.255101  

   Kasper, J. C.; Klein, K. G.; Lichko, E.; Huang, Jia; Chen, C. H. K.; Badman, S. T.; Bonnell, J.; Whittlesey, P. L.; Livi, R.; Larson, D.; et al (December 2021, Physical Review Letters)
2. Solar Cycle and Solar Wind Dependence of the Occurrence of Large dB / dt Events at High Latitudes

   https://doi.org/10.1029/2022JA030953  

   Milan, S. E.; Imber, S. M.; Fleetham, A. L.; Gjerloev, J. (April 2023, Journal of Geophysical Research: Space Physics)

   Key Points Large dB / dt “spikes” in ground magnetometer data occur in three local time hotspots in the pre‐midnight, dawn, and pre‐noon sectors These are consistent with spikes produced by substorm onsets, omega bands, and the Kelvin‐Helmholtz instability, respectively Spike occurrence is controlled by solar activity, maximizing in the declining phase of the solar cycle, esp. solar cycle 23 

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3. The Heliospheric Current Sheet in the Inner Heliosphere Observed by the Parker Solar Probe

   https://doi.org/10.3847/1538-4365/ab5dac  

   Szabo, Adam; Larson, Davin; Whittlesey, Phyllis; Stevens, Michael L.; Lavraud, Benoit; Phan, Tai; Wallace, Samantha; Jones-Mecholsky, Shaela I.; Arge, Charles N.; Badman, Samuel T.; et al (February 2020, The Astrophysical Journal Supplement Series)
4. Sunward-propagating Whistler Waves Collocated with Localized Magnetic Field Holes in the Solar Wind: Parker Solar Probe Observations at 35.7 R _⊙ Radii

   https://doi.org/10.3847/2041-8213/ab799c  

   Agapitov, O. V.; Wit, T. Dudok; Mozer, F. S.; Bonnell, J. W.; Drake, J. F.; Malaspina, D.; Krasnoselskikh, V.; Bale, S.; Whittlesey, P. L.; Case, A. W.; et al (March 2020, The Astrophysical Journal)
5. Cold Solar Flares. I. Microwave Domain

   https://doi.org/10.3847/1538-4357/acea20  

   Lysenko, Alexandra_L; White, Stephen_M; Zhdanov, Dmitry_A; Meshalkina, Nataliia_S; Altyntsev, Aleksander_T; Motorina, Galina_G; Fleishman, Gregory_D (August 2023, The Astrophysical Journal)

   Abstract We identify a set of ∼100 “cold” solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission. This work is a follow-up of a previous statistical study of cold flares, which focused on hard X-ray emission to quantify the flare nonthermal component. Here, we focus on the microwave emission. The thermal response is evaluated by the soft X-ray emission measured by the GOES X-ray sensors. We obtain spectral parameters of the flare gyrosynchrotron emission and reveal patterns of their temporal evolution. The main results of the previous statistical study are confirmed: as compared to a “mean” flare, the cold flares have shorter durations, higher spectral peak frequencies, and harder spectral indices above the spectral peak. Nonetheless, there are some cold flares with moderate and low peak frequencies. In the majority of cold flares, we find evidence of the Razin effect in the microwave spectra, indicative of rather dense flaring loops. We discuss the results in the context of the electron acceleration efficiency. 

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