Detecting Exomoons Via Doppler Monitoring of Directly Imaged Exoplanets
作者： Saul A. Rappaport , Andrew Vanderburg , Andrew W. Mayo
关键词: Solar System 、 Neptune 、 Astronomy 、 Exomoon 、 Exoplanet 、 Planet 、 Radial velocity 、 Uranus 、 Physics 、 Giant planet
摘要: Recently, Teachey, Kipping, and Schmitt (2018) reported the detection of a candidate exomoon, tentatively designated Kepler-1625b I, around giant planet in Kepler field. The exomoon would be about size mass Neptune, considerably larger than any moon our Solar System, if confirmed, first new class moons or binary planets. Motivated by large ratio satellite system, we investigate detectability similarly massive exomoons directly imaged exoplanets via Doppler spectroscopy. induce radial velocity signal 200 m/s on its host planet, enough that similar planets orbiting bright, nearby stars might detected with current next generation instrumentation. In addition to searching for exomoons, survey could reveal orientations planets' spin axes, making it possible identify Uranus analogs.
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