Observed local dispersion relations for magneto-acoustic-gravity waves in the Sun's atmosphere: Mapping the acoustic cut-off frequency
arXiv:1910.03198 · doi:10.3847/2041-8213/ab4719
Abstract
We present the observed local dispersion relations for magneto-acoustic-gravity waves in the Sun's atmosphere for different levels of magnetic field strength. We model these data with a theoretical local dispersion relation to produce spatial maps of the acoustic cut-off frequency in the Sun's photosphere. These maps have implications for the mechanical heating of the Sun's upper atmosphere, by magneto-acoustic-gravity waves, at different phases of the solar magnetic activity cycle.
References in corpus (13)
- Recent advances in coronal heating
- On the Formation Height of the SDO/HMI Fe 6173 Doppler Signal
- Sunspot seismic halos generated by fast MHD wave refraction
- Height variation of the cutoff frequency in a sunspot umbra
- Magneto-acoustic wave energy from numerical simulations of an observed sunspot umbra
- Helioseismology of sunspots: how sensitive are travel times to the Wilson depression and to the subsurface magnetic field?
- The acoustic cut-off frequency of the Sun and the solar magnetic activity cycle
- Hinode and IRIS observations of the magnetohydrodynamic waves propagating from the photosphere to the chromosphere in a sunspot
- The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere
- Interpreting the Helioseismic and Magnetic Imager (HMI) Multi-Height Velocity Measurements
- MHD wave refraction and the acoustic halo effect around solar active regions - a 3D study
- Variation of acoustic cutoff period with height in the solar atmosphere: theory versus observations
- Helioseismic Holography of Simulated Sunspots: dependence of the travel time on magnetic field strength and Wilson depression
Cited by in corpus (8)
- Waves in the lower solar atmosphere: the dawn of next-generation solar telescopes
- Numerical determination of the cutoff frequency in solar models
- Continuous Solar Observations from the Ground -- Assessing Duty Cycle from GONG Observations
- Acoustic-gravity wave propagation characteristics in 3D radiation hydrodynamic simulations of the solar atmosphere
- Constraining the systematics of (acoustic) wave heating estimates in the solar chromosphere
- Multi-Height Observations of Atmospheric Gravity Waves at Solar Disk Center
- A New Method for Detecting Solar Atmospheric Gravity Waves
- Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling: II -- Revised Grid of Models