Gravitational Waves, Exoplanets and Habitable Zone

Data: 
27/03/2019 - 14:00 - 15:00

Gravitational Waves, Exoplanets and Habitable Zone

 

José Ademir S. de Lima

IAG/USP

 

In the last two decades, thousands of extrasolar planets were discovered based on different observational techniques, and their number must increase substantially in virtue of the ongoing and near-future approved missions and facilities. In our talk we propose that interesting signatures of binary systems from nearby exoplanets and their parent stars can also be obtained measuring the pattern of gravitational waves that will be made available by the new generation of detectors including the space-based LISA (Laser Interferometer Space Antenna) observatory. As an example, a subset of exoplanets with extremely short periods (less than 80 min) is discussed. Our analysis suggests that the emitted gravitational wave pattern may also provide an efficient tool to discover ultrashort period exoplanets. It is also advocated that the emission of gravitational luminosity powered by binary systems like ultrashort period exoplanets orbiting a central star or ultracompact double stars may alter significantly the electromagnetic stellar habitable zone.