New ZZ Ceti stars from the LAMOST survey
Jie Su, Jianning Fu, Guifang Lin, Fangfang Chen, Pongsak Khokhuntod, and Chunqian Li

TL;DR
This study identifies four new ZZ Ceti white dwarf stars from the LAMOST survey by selecting candidates based on temperature and confirming their variability through follow-up observations.
Contribution
The paper reports the discovery of four new ZZ Ceti stars using LAMOST data and follow-up photometry, expanding the known sample of pulsating white dwarfs.
Findings
Four new ZZ Ceti stars confirmed through photometry
Two potential helium-core white dwarfs identified
Stars exhibit dominant pulsation peaks above 99.9% confidence level
Abstract
The spectroscopic sky survey carried out by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) provides the largest stellar spectra library in the world until now. A large number of new DA white dwarfs had been identified based on the LAMOST spectra. The effective temperature () and surface gravity () of most DA white dwarfs were determined and published in the catalogs, e.g. Zhao et al. (2013), Rebassa-Mansergas et al. (2015), Gentile Fusillo et al. (2015) and Guo et al. (2015). We selected ZZ Ceti candidates from the published catalogs by considering whether their are situated in the ZZ Ceti instability strip. The follow-up time-series photometric observations for the candidates were performed in 2015 and 2016. Four stars: LAMOST J004628.31+343319.90, LAMOST J062159.49+252335.9, LAMOST J010302.46+433756.2 and LAMOST…
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