Does Si play a role in the formation of extrasolar planet systems? |
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| Authors: | C Huang G Zhao H W Zhang Y Q Chen |
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| Institution: | (1) Department of Astronomy, Peking University, Beijing, 100 871, China;(2) National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100 012, China;(3) National Center for Space Weather, China Meteorological Administration, Beijing, 100 081, China |
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| Abstract: | With the high signal-to-noise ratio spectra, we obtained Si abundances of 22 extrasolar planet host stars, and discussed some
constraints on the planet formation. Using our silicon abundance results and other authors’ Si abundance studies about planets-harboring
stars, we investigated the correlation between the dynamical properties and the silicon abundance. We propose a hypothesis
that higher primordial metallicity in the host stars’ birth cloud with higher abundance of Si will make the cloud more sticky
to bypass the time scale restriction in planet formation and easier to form the planets. |
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| Keywords: | Planetary systems: formation stars: abundances stars: late-type |
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