Detecting Planets around Compact Binaries with Gravitational Wave Detectors in Space

Understand

I propose a method to detect planets around compact binaries that are strong sources of gravitational radiation.

• This approach is to measure gravitational-wave phase modulations induced by the planets, and its prospect is studied with a Fisher matrix analysis.
• I find that, using the Laser Interferometer Space Antenna (LISA), planets can be searched for around ~3000 Galactic double white dwarfs with detection limit ~4 M_J (M_J~ 2x10^{30}g: the Jupiter mass).
• With its follow-on missions, planets with mass ~1 M_J might be detected around double neutron stars even at cosmological distances z~1.