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White dwarf binary systems

LISA will be able to detect gravitational waves from white dwarf binaries when they are still far apart.

The waves from these systems will enter the frequency band of current and future generation ground-based gravitational-wave detectors as they get closer to merger and can then be observed on Earth. Using both LISA and the ground-based observatories, we will thus be able to observe these binary systems in the gravitational-wave spectrum across a great part of their existence.

In a binary star system known as J0806, two dense white dwarf stars orbit each other once every 321 seconds.
In a binary star system known as J0806, two dense white dwarf stars orbit each other once every 321 seconds. © NASA/Tod Strohmayer (GSFC)/Dana Berry (Chandra X-Ray Observatory)

White dwarf binaries have been detected by electromagnetic observations and are known to exist in plenty across our galaxy.

LISA guarantees the detection of gravitational waves by monitoring the most promising of these known nearby galactic binary systems, which we sometimes call “verification binaries”. Gravitational waves from neutron star binaries will allow us to explore extremely dense matter systems, stellar evolution and high-energy astrophysics. LISA will detect these systems before they enter the ground-based band, allowing us to constrain their