Comparing the Observational Instability Regions for Pulsating Pre-Main-Sequence and Classical ? Scuti Stars

Author(s)
Konstanze Zwintz
Abstract

A comparison of the hot and cool boundaries of the classical instability strip with observations has been an important test for stellar structure and evolution models of post- and main-sequence stars. Over the last few years, the number of pulsating pre-main-sequence (PMS) stars has increased significantly: 36 PMS pulsators and candidates are known as of 2007 June. This number allows to investigate the location of the empirical PMS instability region and to compare its boundaries to those of the classical (post- and main-sequence) instability strip. Due to the structural differences of PMS and (post-)main-sequence stars, the frequency spacings for nonradial modes will be measurably different, thus challenging asteroseismology as a diagnostic tool.

Organisation(s)
Department of Astrophysics
Journal
The Astrophysical Journal: an international review of astronomy and astronomical physics
Volume
673
Pages
1088-1092
No. of pages
5
ISSN
0004-637X
DOI
https://doi.org/10.1086/524293
Publication date
2008
Peer reviewed
Yes
Austrian Fields of Science 2012
103003 Astronomy
Portal url
https://ucrisportal.univie.ac.at/en/publications/ae7e7e60-1dec-497d-8ca6-8aff87ee520f