English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The spectroscopic sky survey carried out by the Large Sky Area Multi-ObjectFiber Spectroscopic Telescope (LAMOST) provides the largest stellar spectralibrary in the world until now. A large number of new DA white dwarfs had beenidentified based on the LAMOST spectra. The effective temperature ($T_{\rmeff}$) and surface gravity ($\log g$) of most DA white dwarfs were determinedand published in the catalogs, e.g. Zhao et al. (2013), Rebassa-Mansergas etal. (2015), Gentile Fusillo et al. (2015) and Guo et al. (2015). We selected ZZCeti candidates from the published catalogs by considering whether their$T_{\rm eff}$ are situated in the ZZ Ceti instability strip. The follow-uptime-series photometric observations for the candidates were performed in 2015and 2016. Four stars: LAMOST J004628.31+343319.90, LAMOST J062159.49+252335.9,LAMOST J010302.46+433756.2 and LAMOST J013033.90+273757.9 are finally confirmedto be new ZZ Ceti stars. They show dominant peaks with amplitudes rising abovethe 99.9% confidence level in the amplitude spectra. As LAMOSTJ004628.31+343319.90 has an estimated mass of $\sim$ 0.40 $M_{\odot}$ andLAMOST J013033.90+273757.9 has a mass of $\sim$ 0.45 $M_{\odot}$ derived fromtheir $\log g$ values, these two stars are inferred to be potential helium-corewhite dwarfs.

New ZZ Ceti stars from the LAMOST survey