Computer Science
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..129r&link_type=abstract
NOAO Proposal ID #2001A-0129
Computer Science
Scientific paper
Studies of pulsating subdwarf B (sdBV or EC14026) stars have blossomed since their discovery just a few years ago. Yet despite the incredible member discovery rate, we know very little about the pulsations themselves. Only a few EC14026 stars have had the advantage of multi-site data, and only one of these has yielded reasonably secure mode identifications (Kawaler, 1999); a necessary step to combine theory and observations. PG 1336-018 is an EC14026 star in an eclipsing binary system. This allows us the opportunity to identify pulsation modes in 2 different ways: Stellar rotation splits non-radial modes, allowing us to discern radial from non-radial pulsations. With an orbital period of 2.4 hours, we may assume a tidally locked system, providing a known rotational splitting. Additionally, primary eclipse covers about half of the pulsator. This allows us the opportunity to resolve pulsations across it's surface during primary eclipse. The increased coverage, signal to noise, and time resolution of the Whole Earth Telescope will allow us to find rotationally-split components and use the eclipses to unambiguously identify pulsation modes.
Kanaan Antonio
Kawaler Steve
Kilkenny Dave
Olivera Kepler
Reed Mike
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