Recent years have witnessed the discovery of many low-mass (≲0.45M⊙) white dwarf (WD) stars --- expected to harbor He cores--- in the field of the Milky Way and in several galactic globular and open clusters. Recently, three pulsating objects of this kind have been discovered: SDSS J1840+6423, SDSS J1112+1117, and SDSS J1518+0658. Motivated by these very exciting findings, and in view of the valuable asteroseismological potential of these objects, we present here the main outcomes of a detailed theoretical study on the seismic properties of low-mass He-core WDs based on fully evolutionary models representative of these objects. This study is aimed to provide a theoretical basis from which to interpret present and future observations of variable low-mass WDs.
@article{arxiv.1304.3055,
title = {The pulsating low-mass He-core white dwarfs},
author = {Alejandro H. Córsico and Leandro G. Althaus and Alejandra D. Romero},
journal= {arXiv preprint arXiv:1304.3055},
year = {2013}
}
Comments
7 pages, 4 figures. To be published in the proceedings of the Fujihara seminar "Progress in physics of the sun and stars: a new era in helio- and asteroseismology"