Journal Article10.1103/physrevd.109.103016
Exploring the orbital alignments of Galactic close white dwarf binaries with LISA
Naoki Seto
- 20 Apr 2024
TL;DR: LISA will measure the orbital alignments of a large number of close white dwarf binaries, allowing for the exploration of the randomness of their orientations and the detection of a quadrupole pattern.
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Abstract: Using the proposed space gravitational wave detector LISA, we will be able to measure the geometrical configurations of $\sim 10^4$ close white dwarf binaries in our Galaxy. The obtained data will be an entirely new resource to examine the randomness of their orbital orientations. Partly motivated by a recent reported on the systematic alignments of bulge planetary nebulae, we discuss the outlook of the orientational analysis with LISA. We find that a quadrupole pattern as small as $\sim 0.05$ can be detected for bulge white dwarf binaries, owing to their large available number. From such a pattern analysis, we might geometrically explore fossil records in our Galaxy billions of years ago.
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