Thirty-five new pulsating DA white dwarf stars
We present 35 new pulsating DA (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS). We have acquired high-speed time series photometry of preselected DAwhite dwarfs with a prime focus CCD photometer on the 2.1 m telescope at...
| Autores: | , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/108916 |
| Acceso en línea: | http://hdl.handle.net/10183/108916 |
| Access Level: | acceso abierto |
| Palabra clave: | Atmosferas estelares Fotometria estelar Pulsacoes estelares Espectros estelares Estrutura estelar Estrelas variaveis Anãs brancas Stars: imaging Stars: oscillations Stars: variables: other Techniques: photometric White dwarfs |
| Sumario: | We present 35 new pulsating DA (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS). We have acquired high-speed time series photometry of preselected DAwhite dwarfs with a prime focus CCD photometer on the 2.1 m telescope at McDonald Observatory over 15 months. We selected these stars on the basis of prior photometric and spectroscopic observations by the SDSS and HQS. For the homogeneous SDSS sample, we achieve a success rate of 80% for finding new variables at a detection threshold of 0.1%–0.3%. With 35 newly discovered DA variable white dwarfs, we almost double the current sample of 39. |
|---|