They Do Change After All: 25 Years of GONG Data Reveal Variation of p-Mode Energy Supply Rates
arXiv:2010.06287 · doi: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 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 anti-correlated with the level of solar activity, for which we use the index as a proxy. Modes of different mode frequency and harmonic degrees show varying strengths of anti-correlation with the index, reaching as low as for low frequency modes with . 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.
arXiv commentAccepted for publication in Monthly Notices of the Royal Astronomical Society. 16 pages, 11 figures
References in corpus (29)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- The Transiting Exoplanet Survey Satellite
- Kepler Mission Design, Realized Photometric Performance, and Early Science
- CoRoT reveals a magnetic activity cycle in a Sun-like star
- Predicting the detectability of oscillations in solar-type stars observed by Kepler
- Global Seismology of the Sun
- Excitation of solar-like oscillations across the HR diagram
- The asteroseismic potential of TESS: exoplanet-host stars
- Interaction Between Convection and Pulsation
- Numerical constraints on the model of stochastic excitation of solar-type oscillations
- Stellar magnetic activity and variability of oscillation parameters - An investigation of 24 solar-like stars observed by Kepler
- Seismic sensitivity to sub-surface solar activity from 18 years of GOLF/SoHO observations
- Revisiting the impact of stellar magnetic activity on the detectability of solar-like oscillations by Kepler
- Quasi-Biennial variations in helioseismic frequencies: Can the source of the variation be localized?
- Signatures of magnetic activity in the seismic data of solar-type stars observed by Kepler
- A Comparison Between Global Proxies of the Sun's Magnetic Activity Cycle: Inferences from Helioseismology
- A closure model with plumes II. Application to the stochastic excitation of stellar p modes
- On the frequency dependence of p-mode frequency shifts induced by magnetic activity in Kepler solar-like stars
- A Helioseismic Perspective on the Depth of the Minimum Between Solar Cycles 23 and 24
- Variations in High Degree Acoustic Mode Frequencies of the Sun during Solar Cycle 23 and 24
- Sun-as-a-star observations: evidence for degree dependence of changes in damping of low-l p modes along the solar cycle
- The Sun's interior structure and dynamics, and the solar cycle
- Convective Excitation and Damping of Solar-like Oscillations
- The amplitude of solar p-mode oscillations from three-dimensional convection simulations
- Stellar turbulence and mode physics
- Lifetimes of High-Degree p Modes in the Quiet and Active Sun
- GONG p-mode parameters through two solar cycles
- Turbulent eddy-time-correlation in the solar convective zone
- Modelling the asymmetries of the Sun's radial -mode line profiles