APA
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Allen, R., Ho, G., Mason, G., Li, G., Jian, L., Vines, S., … Wiedenbeck, M. (2021). Radial Evolution of a CIR: Observations From a Nearly Radially Aligned Event Between Parker Solar Probe and STEREO‐A. Geophysical Research Letters.
Chicago/Turabian
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Allen, R., G. Ho, G. Mason, G. Li, L. Jian, S. Vines, N. Schwadron, et al. “Radial Evolution of a CIR: Observations From a Nearly Radially Aligned Event Between Parker Solar Probe and STEREO‐A.” Geophysical Research Letters (2021).
MLA
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Allen, R., et al. “Radial Evolution of a CIR: Observations From a Nearly Radially Aligned Event Between Parker Solar Probe and STEREO‐A.” Geophysical Research Letters, 2021.
BibTeX Click to copy
@article{r2021a,
title = {Radial Evolution of a CIR: Observations From a Nearly Radially Aligned Event Between Parker Solar Probe and STEREO‐A},
year = {2021},
journal = {Geophysical Research Letters},
author = {Allen, R. and Ho, G. and Mason, G. and Li, G. and Jian, L. and Vines, S. and Schwadron, N. and Joyce, C. and Bale, S. and Bonnell, J. and Case, A. and Christian, E. and Cohen, C. and Desai, M. and Filwett, R. and Goetz, K. and Harvey, P. and Hill, M. and Kasper, J. and Korreck, K. and Lario, D. and Larson, D. and Livi, R. and Macdowall, R. and Malaspina, D. and McComas, D. and McNutt, R. and Mitchell, D. and Paulson, K. and Pulupa, M. and Raouafi, N. and Stevens, M. and Whittlesey, P. and Wiedenbeck, M.}
}
The addition of Parker Solar Probe (PSP) to the Heliophysics System Observatory has allowed for the unprecedented ability to study Corotating Interaction Regions (CIRs) at multiple radial distances without significant temporal/longitudinal variations. On September 19, 2019, PSP observed a CIR at ∼0.5 au when it was nearly radially aligned with the Solar Terrestrial Relations Observatory‐Ahead (STEREO‐A) spacecraft at ∼1 au, allowing for an unambiguous assessment of the radial evolution of a single CIR. Bulk plasma and magnetic field signatures of the CIR evolve in a fashion characteristic to previous observations; however, the suprathermal ions are enhanced over a larger longitudinal range at PSP than at STEREO‐A, although at much lower intensities. The longitudinal spread appears to be largely a consequence of magnetic field line topology at CIRs between the compressed slow solar wind upstream and high‐speed stream following the CIR, underscoring the importance of the large‐scale topology of these structures.