ENERGY LOSS OF SOLAR p MODES DUE TO THE EXCITATION OF MAGNETIC SAUSAGE TUBE WAVES: IMPORTANCE OF COUPLING THE UPPER ATMOSPHERE

The coupling of p modes and sausage tube waves is studied in a model atmosphere composed of a polytropic interior above which lies an isothermal upper atmosphere. The model presented here avoids such problems by using an isothermal layer to model the overlying atmosphere (chromosphere, and, conseque...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2014-07, Vol.789 (2), p.1-9
Main Authors: Gascoyne, A, Jain, R, Hindman, B W
Format: Article
Language:English
Subjects:
ABSORPTION
Acoustics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Atmospheres
BOUNDARY CONDITIONS
CHROMOSPHERE
COUPLING
ENERGY LOSSES
EXCITATION
FREQUENCY DEPENDENCE
Joining
LAYERS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETOHYDRODYNAMICS
MHZ RANGE
OSCILLATIONS
PHOTOSPHERE
PLASMA
Sausages
Solar atmosphere
SUN
Tubes
Upper atmosphere
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The coupling of p modes and sausage tube waves is studied in a model atmosphere composed of a polytropic interior above which lies an isothermal upper atmosphere. The model presented here avoids such problems by using an isothermal layer to model the overlying atmosphere (chromosphere, and, consequently, allows us to analyze the propagation of p-mode-driven sausage waves above the photosphere. In this paper, we restrict our attention to frequencies below the acoustic cut off frequency. We demonstrate die importance of coupling all waves (acoustic, magnetic) in the subsurface solar atmosphere with the overlying atmosphere in order to accurately model the interaction of solar f and p modes with sausage tube waves. In calculating the absorption and damping of p modes, we find that for low frequencies, below approximately 3.5 mHz, the isothermal atmosphere, for the two-region model, behaves like a stress-free boundary condition applied at the interface (z = -z sub(0)).
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/789/2/109