Higher vibrational modes in RR lyrae stars

Ami Glasner, JR Buchler

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A simple method for computing the full spectrum of the linear (nonadiabatic) radial modes is implemented and tested on RR Lyrae models. The growthrates of the vibrational modes display unexpected, but physically correct undulations as a function of period, with the 8th through 10th overtones almost unstable. Caution must be exercised when only a small number of meshpoints is used, or when the meshpoints are not well distributed, as some of these overtones may become unstable, clearly an artifact of the differencing. The role that such unstable high overtones can play in hydrodynamic calculations is demonstrated.
Original languageAmerican English
Title of host publicationNew Perspectives on Stellar Pulsation and Pulsating Variable Stars
PublisherCambridge University Press
Pages263 - 264
Number of pages2
StatePublished - 1993

Publication series

NameInternational Astronomical Union Colloquium
ISSN (Electronic)0252-9211


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