Towards a pure ZZ Ceti instability strip

2006/11/10 by B. G. Castanheira, S. O. Kepler, A. F. M. Costa +10 · 2 citations
Mathematics · Physics and Astronomy · #Amplitude #Astrophysics #Astrophysics and Star Formation Studies #Context (archaeology) #Geology #Instability #Instability strip #Mathematics #Mechanics #Optics #Physics #Solar and Space Plasma Dynamics #Stars #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:20065886

12 pages, 3 figurs

arxiv created 2006/11/10 · openalex publication_date 2006/11/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Context.We have observed again two stars inside the ZZ Ceti instability strip that were previously classified as not-observed-to-vary (NOV) by Mukadam et al. (2004) and found them to be low-amplitude variables. Some evidence points to a pure ZZ Ceti instability strip; other evidence contests it.

Citations

• Gemini spectra of 12 000 K white dwarf stars
• Ensemble Characteristics of the ZZ Ceti Stars
• Whole Earth Telescope observations of BPM 37093: a seismological test of crystallization theory in white dwarfs

Cited by

• A Search for Pulsations in Helium White Dwarfs
• New developments of the ZZ Ceti instability strip: the discovery of 11 new variables★