Two new ZZ Ceti pulsators from the HS and HE surveys
2005 | journal article. A publication with affiliation to the University of Göttingen.
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Two new ZZ Ceti pulsators from the HS and HE surveys
Silvotti, R.; Voss, B.; Bruni, I.; Koester, D.; Reimers, D.; Napiwotzki, R. & Homeier, D. (2005)
Astronomy and Astrophysics, 443(1) pp. 195-199. DOI: https://doi.org/10.1051/0004-6361:20053362
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Details
- Authors
- Silvotti, Roberto; Voss, B.; Bruni, I.; Koester, D.; Reimers, Dieter; Napiwotzki, R.; Homeier, Derek
- Abstract
- We report the detection of nonradial g-mode oscillations in the DA white dwarfs HS 1039+4112 (B = 15.9) and HE 1429-0343 (B = 15.8) from time-series photometry made at the Loiano 1.5 m telescope. The two stars were previously selected as probable pulsators based on two-color photometry and spectral analysis respectively. Following our temperature and surface gravity determinations, HS 1039+4112 (T-eff = 11 200 K, log g = 8.2) is located near the red edge of the ZZ Ceti instability strip, whereas HE 1429-0343 (T-eff = 11 400 K, log g = 7.8) falls in the middle of the strip. Both stars show a multi-mode behavior with the main periods at about 850 and 970 s respectively, and relatively large amplitudes (similar to 7% and similar to 2.5%).
- Issue Date
- 2005
- Status
- published
- Publisher
- Edp Sciences S A
- Journal
- Astronomy and Astrophysics
- Organization
- Fakultät für Physik
- ISSN
- 0004-6361
