Detecting Planets around Compact Binaries with Gravitational Wave Detectors in Space

Details Detecting Planets around Compact Binaries with Gravitational Wave Detectors in Space Detecting Planets around Compact Binaries with Gravitational Wave Detectors in Space

2008-02-22

arxiv.org/abs/0802.3411v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in ApJL

Scientific paper

10.1086/587785

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. In this manner, gravitational wave observation has potential to make interesting contributions to extra-solar planetary science.

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