Speaker
Description
The first detection of a gravitational-wave (GW) signal in 2015 have opened a new observational window to probe the universe. This probe can not only reveal previously inaccessible binaries, black holes, and other compact objects, but also can detect exoplanets through their imprint on GW signals, thereby significantly extend current exoplanet surveys. To date, nearly 6 000 exoplanets have been confirmed, yet most reside either in the solar neighbourhood or along the sightline toward the Galactic bulge, reflecting the range limits of existing electromagnetic techniques. We follow the previous work N. Tamanini & C. Danielski (2019) and demonstrate that frequency modulations in GW signals from early-stage binary neutron stars (BNSs) induced by circumbinary exoplanets (CBPs), can be measured by future space-borne detectors such as Laser Interferometer Space Antenna (LISA) and DECi-hertz Interferometer Gravitational wave Observatory (DECIGO). For an equal-mass BNS system of 1.4 $M_{\odot}$ + 1.4 $M_{\odot}$, DECIGO could detect such planets out to distances of ~ 10 Mpc, offering an unprecedented opportunity to study planetary formation and evolution.
