Direct measurement of the secular pulsational variation of the DOV star PG 1159-035
Costa J. E. S., Kepler S. O.
Open Astronomy · 1998
doi:10.1515/astro-1998-0111 (opens in a new tab)
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Abstract
We measured the secular variation of the 516 s period of the pre-white dwarf PG 1159-035 with new data and a method which measures the change of the period directly, obtaining a positive value: ( + 13.0±2.6)X10 -11 s/s.This new value agrees in sign with the theoretical predictions, but is an order of magnitude larger.
Abstract licence: CC BY
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