Clustering of Intermittent Magnetic and Flow Structures near Parker Solar Probe's First Perihelion—A Partial-variance-of-increments Analysis
| dc.contributor.author | Chhiber, Rohit | |
| dc.contributor.author | Goldstein, Melvyn | |
| dc.contributor.author | Maruca, B. A. | |
| dc.contributor.author | Chasapis, A. | |
| dc.contributor.author | et al | |
| dc.date.accessioned | 2022-08-24T20:41:29Z | |
| dc.date.available | 2022-08-24T20:41:29Z | |
| dc.date.issued | 2020-02-03 | |
| dc.description | Authors: Rohit Chhiber, Melvyn Goldstein, B. A. Maruca, A. Chasapis, W. H. Matthaeus, D. Ruffolo, R. Bandyopadhyay, T. N. Parashar, R. Qudsi, T. Dudok de Wit, S. D. Bale, J. W. Bonnell, K. Goetz, P. R. Harvey, R. J. MacDowall, D. Malaspina, M. Pulupa, J. C. Kasper, K. E. Korreck, A. W. Case, M. Stevens, P. Whittlesey, D. Larson, R. Livi, M. Velli, and N. Raouafi | en_US |
| dc.description.abstract | During the Parker Solar Probe's (PSP) first perihelion pass, the spacecraft reached within a heliocentric distance of ∼37 R⊙ and observed numerous magnetic and flow structures characterized by sharp gradients. To better understand these intermittent structures in the young solar wind, an important property to examine is their degree of correlation in time and space. To this end, we use the well-tested partial variance of increments (PVI) technique to identify intermittent events in FIELDS and SWEAP observations of magnetic and proton-velocity fields (respectively) during PSP's first solar encounter, when the spacecraft was within 0.25 au from the Sun. We then examine distributions of waiting times (WT) between events with varying separation and PVI thresholds. We find power-law distributions for WT shorter than a characteristic scale comparable to the correlation time of the fluctuations, suggesting a high degree of correlation that may originate in a clustering process. WT longer than this characteristic time are better described by an exponential, suggesting a random memory-less Poisson process at play. These findings are consistent with near-Earth observations of solar wind turbulence. The present study complements the one by Dudok de Wit et al., which focuses on WT between observed "switchbacks" in the radial magnetic field. | en_US |
| dc.description.sponsorship | This research as been supported in part by the Parker Solar Probe mission under the IS⊙IS project (contract NNN06AA01C) and a subcontract to University of Delaware from Princeton (SUB0000165). Additional support is acknowledged from NASA's LWS (NNX17AB79G), HSR (80NSSC18K1210 and 80NSSC18K1648), and HGI (80NSSC19K0284) programs; and grant RTA6280002 from Thailand Science Research and Innovation. Parker Solar Probe was designed, built, and is now operated by the Johns Hopkins Applied Physics Laboratory as part of NASA's Living with a Star (LWS) program (contract NNN06AA01C). Support from the LWS management and technical team has played a critical role in the success of the Parker Solar Probe mission. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.3847/1538-4365/ab53d2 | en_US |
| dc.format.extent | 10 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m20lqf-zd9f | |
| dc.identifier.citation | “Clustering of Intermittent Magnetic and Flow Structures near Parker Solar Probe’s First Perihelion—A Partial Variance of Increments Analysis”, Rohit Chhiber, M.L. Goldstein, B.A. Maruca, A. Chasapis, W.H. Matthaeus, D. Ruffolo, R. Bandyopadhyay, T.N. Parashar, R. Qudsi, S.D. Bale, J.W. Bonnell, T. Dudok de Wit, K. Goetz, P.R. Harvey, R.J. MacDowall, D. Malaspina, M. Pulupa, J.C. Kasper, K.E. Korreck, A.W. Case, M. Stevens, P. Whittlesey, D. Larson, R. Livi, M. Velli, N. Raouafi, The Astrophys. J. Suppl. Series, 246, no. 31 (3 Feb 2020), https://doi.org/10.3847/1538-4365/ab53d2. | en_US |
| dc.identifier.uri | https://doi.org/10.3847/1538-4365/ab53d2 | |
| dc.identifier.uri | http://hdl.handle.net/11603/25554 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AAS | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Goddard Planetary Heliophysics Institute (GPHI) | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | en_US |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Clustering of Intermittent Magnetic and Flow Structures near Parker Solar Probe's First Perihelion—A Partial-variance-of-increments Analysis | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-5317-988X | en_US |