EPJ Web of Conferences
Volume 101, 2015The Space Photometry Revolution – CoRoT Symposium 3, Kepler KASC-7 Joint Meeting
|Number of page(s)||2|
|Section||Session 6 – Posters|
|Published online||23 September 2015|
Pulsations of Post-AGB Pre-White Dwarfs with Hydrogen-dominated Atmospheres*
Department of Astronomy, School of Science, The University of Tokyo, Tokyo 113-0033, Japan
* The present paper is a modified extract of a more extensive refereed paper published in . Readers should see the full paper for more details.
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Published online: 23 September 2015
It is shown by a fully non adiabatic analysis that pre-white dwarfs with hydrogen-dominated atmospheres in the range of Teff = 40 000 K - 300 000 K are pul-sationally unstable due to nuclear reactions in the hydrogen burning-shell against low-degree g-modes in the period range of about 40-200 s. It is also shown that the amount of hydrogen has a significant influence on the instability domain of such pre-white dwarfs in the Hertzsprung-Russel (H-R) diagram. Hence, the thickness of hydrogen-dominated envelopes may be well constrained by observing the presence of the g-mode oscillations.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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