Overstable solar oscillations of intermediate and high degree

Antia, H. M. ; Chitre, S. M. ; Narasimha, D. (1984) Overstable solar oscillations of intermediate and high degree Memorie della Societa Astronomica Italiana, 55 (1-2). pp. 175-180. ISSN 0037-8720

PDF - Publisher Version

Official URL: http://sait.oat.ts.astro.it/Memlist.htm


The stability of linear acoustic modes trapped in the solar envelope is investigated with the thermal and mechanical effects of turbulence on the mean flow incorporated through turbulent conductivity, viscosity and turbulent pressure. A number of these modes turn out to be overstable, and the most rapidly growing acoustic modes are found to occupy a region centred around 3.2 mHz and spread over a wide range of length scales. These numerical results are in reasonable accord with the observed power-spectrum of the five-minute oscillations.

Item Type:Article
Source:Copyright of this article belongs to Società Astronomica Italiana.
ID Code:75630
Deposited On:24 Dec 2011 13:59
Last Modified:18 May 2016 19:35

Repository Staff Only: item control page