Bibliographic Details
| Title: |
Solar Wind Density and Core Temperature Derived from the PSP Quasi-thermal Noise Measurements |
| Authors: |
Xianming Zheng, Kaijun Liu, Mihailo M. Martinović, Viviane Pierrard, Mingzhe Liu, Qingbao He, Kun Cheng, Yuqi Liu, Yan Wang |
| Source: |
The Astrophysical Journal, Vol 963, Iss 2, p 154 (2024) |
| Publisher Information: |
IOP Publishing, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Astrophysics |
| Subject Terms: |
Solar wind, Space probes, Space plasmas, Plasma physics, Astrophysics, QB460-466 |
| More Details: |
Quasi-thermal noise (QTN) spectroscopy is a valuable method to deduce important parameters in space plasma, such as plasma density and temperature, especially when direct particle measurements are not available. The present study develops a new fitting method to fit the QTN spectra observed by the Parker Solar Probe (PSP) with a comprehensive theoretical QTN spectral model. By combining the steepest descent and Levenberg–Marquardt algorithms, the new method is more flexible with initial guess values but still yields reliable solar wind electron density and temperature values. The new method is applied to derive the solar wind density and core temperature from the QTN measurements during 10 encounters of PSP. The electron density and temperature values obtained vary with the radial distance from the Sun as n _e ∝ r ^−2.12 and T _e ∝ r ^−0.71 , both of which are consistent with existing models and previous results. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1538-4357 |
| Relation: |
https://doaj.org/toc/1538-4357 |
| DOI: |
10.3847/1538-4357/ad236d |
| Access URL: |
https://doaj.org/article/896903d85d2a49c7b22de8677f47d7a2 |
| Accession Number: |
edsdoj.896903d85d2a49c7b22de8677f47d7a2 |
| Database: |
Directory of Open Access Journals |
