The Galactic Compact-binary Population As Target And Noise Source For Low-frequency Gravitational-wave Astronomy

Astronomy and Astrophysics – Astronomy

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Scientific paper

Ultra-compact Galactic binaries, where at least one member is a white dwarf or neutron star, constitute the majority of individually detectable sources for future low-frequency space-based GW observatories such as ESA's NGO; in addition, they may form the dominant unresolvable Galactic foreground at frequencies below a few mHz. So far the majority of studies involving Galactic binaries have been based on theoretical population synthesis, due to the paucity of electromagnetic observations. Recently, significant observational progress has been made in detecting new systems of compact single or double white dwarf binaries. We consider the impact of revised local space density estimates of compact white dwarf binaries on low-frequency GW observations, and discuss the particular case of NGO, a candidate to ESA's Cosmic Vision large-mission program.

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