Waves and granulation

Zhugzhda, Y. (2002) Waves and granulation. Il nuovo cimento C, 25 (5\6). p. 623. ISSN 1826-9885

ncc8837.pdf - Published Version

Download (134kB) | Preview
Official URL: https://www.sif.it/riviste/sif/ncc/econtents/2002/...


Propagation of hydrodynamic waves is considered in frames of the one-dimensional model of granulation. An exact analytical solution of the problem is obtained. The theory is applied only to high-frequency p-modes, because the effect of gravity is neglected. It appears that acoustic waves in a structured atmosphere are not plane ones. Besides, there are hydrodynamic phonon and wave guide wave modes. The results of calculations of the wave functions for high-frequency waves with periods 100–200 s are presented. Upgoing waves are captured in integranular lanes, while downgoing ones are trapped in granules. The effect of wave capture is of greater efficiency for phonon and wave guide modes. The phase velocities of waves differ from the mean sound speed in the photosphere.

Item Type: Article
Additional Information: Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001.
Uncontrolled Keywords: Hydrodynamic waves ; Oscillations and waves, helioseismology ; Photosphere, granulation ; Conference proceedings
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 12 Mar 2020 15:04
Last Modified: 12 Mar 2020 15:04
URI: http://eprints.bice.rm.cnr.it/id/eprint/14855

Actions (login required)

View Item View Item