Identifying modes in a pulsating sdB (EC14026) star

Details Identifying modes in a pulsating sdB (EC14026) star Identifying modes in a pulsating sdB (EC14026) star

2001-11-14

arxiv.org/abs/astro-ph/0111256v1

Astronomy and Astrophysics

Astrophysics

To appear in IAU 185 proceedings: "Radial and Nonradial Pulsations as Probes of Stellar Physics."

Scientific paper

We present a preliminary analysis of time series photometry on the pulsating subdwarf B star PG1336-018 acquired as part of two Whole Earth Telescope runs. PG1336-018 is a multi-mode pulsator with at least 15 periods centered around 175 seconds. It is also an HW~Vir-type eclipsing binary with a period of 2.4 hours. Though over 20 pulsating subdwarf B stars have been discovered, only a few have resolved temporal spectra and still fewer have identified pulsation modes. We analyze features unique to the eclipsing binary system of PG1336-018 as a means of identifying pulsation modes.

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