Title: Mode-identification of pulsating stars from line-profile variations with the moment method - a theoretical-study of the accuracy of the method
Authors: Depauw, M
Aerts, Conny
Waelkens, Christoffel
Issue Date: Dec-1993
Publisher: Springer verlag
Series Title: Astronomy and astrophysics vol:280 issue:2 pages:493-507
Abstract: We present a thorough test of the moment method, used for analysing line profile variations in (non-) radially pulsating stars. The method was first proposed by Balona (1986a,b;1987;1989) and subsequently extended by Aerts et al. (1992). A generalization for multiperiodic stars was given by Mathias et al. (1993). We applied the moment method to a large set of generated profiles, belonging to monoperiodic pulsations, with different values of the pulsation and rotation parameters. It seems that the moment method is able to identify low degree modes (l < 4), if the rotation velocity is not too high. An important limitation is that one needs a large set of high resolution spectra. The estimates of the velocity parameters, also given by the moment method, are only an indication for the exact values and need to be confirmed or corrected by line profile fitting. Also a few double periodic pulsations were considered. The main mode could always be recovered with the moment method, while there were sometimes a few (2 or 3) indistinguishable solutions for the second mode.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: DI
Appears in Collections:Institute of Astronomy

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science