The opacity mechanism in roAp stars

• Type: Article in International Conference Proceedings Book
• Date: 2001

Authors

Cunha, MS (Author) FCUP; Gough, D (Author) Other

Conference proceedings International

Title: PROCEEDINGS OF THE SOHO 10/GONG 2000 WORKSHOP ON HELIO- AND ASTEROSEISMOLOGY AT THE DAWN OF THE MILLENNIUM

Pages: 419-422

SOHO 10/GONG 2000 Workshop on Helio- and Asteroseismology at the Dawn of the Millennium

SANTA CRUZ TENERI, SPAIN, OCT 02-06, 2000

Indexing

ISI Web of Knowledge - 2 Citations

Other information

Authenticus ID: P-000-XSS

Abstract (EN): In the present paper we present the first results of work whose main goal is to understand the details of the process of high-order mode excitation in roAp stars. Motivated by the work by Balmforth et ai. (1999, 2000), according to which convection might be suppressed in the polar regions of roAp stars, we show that in a radiative region the excitation of high-order pulsations takes place in the region of hydrogen ionization, and is the direct consequence of the abrupt change in the opacity derivative kappa (T) = (partial derivative ln kappa/partial derivative In T)(rho) in these layers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4