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Lookup NU author(s): Rathish Ratnasingam,
Dr Philipp Edelmann,
Professor Tamara Rogers
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Oxford University Press, 2019.
For re-use rights please refer to the publisher's terms and conditions.
Internal gravity waves (IGW) propagate in the radiation zones of all stars. During propagation, their amplitudes are affected by two main features: radiative diffusion and density stratification. We have studied the implications of these two features on waves travelling within the radiative zones of non-rotating stars with stellar parameters obtained from the one-dimensional stellar evolution code, MESA. As a simple measure of induced wave dynamics, we define a criterion to see if waves can become non-linear and if so, under what conditions. This was done to understand the role IGW may play in angular momentum transport and mixing within stellar interiors. We find that the IGW generation spectrum, convective velocities, and the strength of density stratification all play major roles in whether waves become non-linear. With increasing stellar mass, there is an increasing trend in non-linear wave energies. The trends with different metallicities and ages depend on the generation spectrum.
Author(s): Ratnasingam RP, Edelmann PVF, Rogers TM
Publication type: Article
Publication status: Published
Journal: Monthly Notices of the Royal Astronomical Society
Print publication date: 01/02/2019
Online publication date: 13/11/2018
Acceptance date: 09/11/2018
Date deposited: 01/02/2019
ISSN (print): 0035-8711
ISSN (electronic): 1365-2966
Publisher: Oxford University Press
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