Multiheight Observations of Atmospheric Gravity Waves at Solar Disk Center

Abstract Atmospheric gravity waves (AGWs) are low-frequency, buoyancy-driven that generated by turbulent convection and propagate obliquely throughout the solar atmosphere. Their proposed energy contribution to lower atmosphere sensitivity atmospheric parameters (e.g., magnetic fields radiative damping) highlight their diagnostic potential. We investigate AGWs near a quiet-Sun disk center region using multiwavelength data from Interferometric Bidimensional Spectrometer Solar Dynamics Observatory. These observations showcase complex wave behavior present in entire acoustic-gravity spectrum. Using Fourier spectral analysis local helioseismology techniques on simultaneously observed line core Doppler velocity intensity fluctuations, we study both vertical horizontal properties of AGWs. Propagating with perpendicular group phase velocities detected at expected temporal spatial scales also find previously unobserved, varied difference distributions among our combinations. Time–distance indicates travel an average speed 4.5 km s −1 , which is only partially described simple simulation, suggesting high-frequency dominate signal. Analysis median field (4.2 G) suggests propagating not significantly affected photospheric fields. Our results illustrate importance multiheight necessity future work properly characterize this behavior.