Six New ZZ Ceti Stars from the SPY and the HQS Surveys

B. Voss, D. Koester, R. Ostensen, R. Napiwotzki, D. Homeier, D. Reimers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

We report on the discovery of six new ZZCeti stars. They were selected as candidates based on preparatory photometric observations of ob- jects from the Hamburg Quasar Survey (HQS), and based on the spectra of the Supernova Ia Progenitor Survey (SPY). Time-series photometry of 19 can- didate stars was carried out at the Nordic Optical Telescope (NOT) at Roque de Los Muchachos Observatory, Spain. The new variables are relatively bright, 15.4 < B < 16.6. Among them is WD 1150−153, which is the third ZZCeti star that shows photospheric CaII in its spectrum.
Original languageEnglish
Title of host publicationIn: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372
PublisherAstronomical Society of the Pacific
Pages583-586
ISBN (Print)978-1-58381-239-6, 978-1-58381-306-5
Publication statusPublished - 2007

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