Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209 (original) (raw)
NASA/ADS
Abstract
We performed time-series photometry of the PG 1159-type star HE 1429-1209, which was recently discovered in the ESO SPY survey. We show that the star is a low-amplitude (≈0.05 mag) non-radial g-mode pulsator with a period of 919 s. HE 1429-1209 is among the hottest known post-AGB stars (Teff = 160 000 K) and, together with the known pulsator RX J2117.1+3412, it defines empirically the blue edge of the GW Vir instability strip in the HRD at high luminosities.
Publication:
Astronomy and Astrophysics
Pub Date:
November 2004
DOI:
arXiv:
Bibcode:
Keywords:
- stars: white dwarfs;
- stars: individual: HE 1429-1209;
- stars: variables: GW Vir;
- stars: AGB and post-AGB;
- Astrophysics
E-Print:
4 pages, 4 figures, to be published in A&