Theoretical understanding of radial-velocity pulsations observed in roAp stars

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Sousa, J (Author) Other; Cunha, MS (Author) FCUP

Journal

Title: Contributions of the Astronomical Observatory Skalnate Pleso

Vol. 38

Pages: 453-454

ISSN: 1335-1842

Publisher: Astronomicky Ustav SAV

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-004-0BG

Abstract (EN): High-resolution spectroscopic time-series of rapidly oscillating Ap stars show evidence that standing and running waves can co-exist in their atmospheric layers. In order to understand these observations we have carried out a theoretical analysis of the pulsations in the outermost layers of these stars. By using the analytical solutions for the velocity components appropriate to the model considered we derive an estimate of the velocity component parallel to the line of sight averaged over the visible stellar disk, and derive the relative amplitude and the phase for our model as a function of height in the atmosphere.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 2