The Library
They do change after all : 25 years of GONG Data reveal variation of p-mode energy supply rates
Tools
Tools
Tools
Kiefer, René and Broomhall, Anne-Marie (2021) They do change after all : 25 years of GONG Data reveal variation of p-mode energy supply rates. Monthly Notices of the Royal Astronomical Society, 500 (3). pp. 3095-3110. doi:10.1093/mnras/staa3198
|
PDF
WRAP-They-do-change-after-all-25-yr-GONG-data-reveal-variation-2021.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (5Mb) | Preview |
Official URL: https://doi.org/10.1093/mnras/staa3198
Abstract
It has been shown over and over again that the parameters of solar p modes vary through the solar activity cycle: frequencies, amplitudes, lifetimes, energies. However, so far, the rates at which energy is supplied to the p modes have not been detected to be sensitive to the level of magnetic activity. We set out to re-inspect their temporal behaviour over the course of the last two Schwabe cycles. For this, we use Global Oscillation Network Group (GONG) p-mode parameter tables. We analyse the energy supply rates for modes of harmonic degrees l = 0-150 and average over the azimuthal orders and, subsequently, over modes in different parameter ranges. This averaging greatly helps in reducing the noise in the data. We find that energy supply rates are anticorrelated with the level of solar activity, for which we use the F10.7 index as a proxy. Modes of different mode frequency and harmonic degrees show varying strengths of anticorrelation with the F10.7 index, reaching as low as r = -0.82 for low frequency modes with l = 101-150. In this first dedicated study of solar p-mode energy supply rates in GONG data, we find that they do indeed vary through the solar cycle. Earlier investigations with data from other instruments were hindered by being limited to low harmonic degrees or by the data sets being too short. We provide tables of time-averaged energy supply rates for individual modes as well as for averages over disjunct frequency bins.
| Item Type: | Journal Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | |||||||||
| Divisions: | Faculty of Science > Physics | |||||||||
| Library of Congress Subject Headings (LCSH): | Helioseismology, Solar magnetic fields -- Computer simulation, Solar oscillations | |||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||
| Publisher: | Oxford University Press | |||||||||
| ISSN: | 1745-3933 | |||||||||
| Official Date: | January 2021 | |||||||||
| Dates: |
|
|||||||||
| Volume: | 500 | |||||||||
| Number: | 3 | |||||||||
| Page Range: | pp. 3095-3110 | |||||||||
| DOI: | 10.1093/mnras/staa3198 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access | |||||||||
| RIOXX Funder/Project Grant: |
|
|||||||||
| Open Access Version: |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
