The Demographics of Extrasolar Planets Beyond the Snow Line with Ground-based Microlensing Surveys

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dc.creatorGaudi, B. Scott
dc.creatorBeaulieu, J. -P.
dc.creatorBennett, David P.
dc.creatorBond, Ian A.
dc.creatorDong, Subo
dc.creatorGould, Andrew
dc.creatorHan, Cheongho
dc.creatorPark, Byeong-Gon
dc.creatorSumi, Takahiro
dc.date2009-03-04
dc.date.accessioned2026-07-07T12:49:13Z
dc.date.available2026-07-07T12:49:13Z
dc.descriptionIn the currently-favored paradigm of planet formation, the location of the snow line in the protoplanetary disk plays a crucial role. Determining the demographics of planets beyond the snow line of stars of various masses is thus essential for testing this model. Microlensing is sensitive to planets that are generally inaccessible to other methods, and in particular is most sensitive to cool planets at or beyond the snow line, including very low-mass (i.e. terrestrial) planets. Hence, microlensing is uniquely suited and so essential for a comprehensive study of this region. Microlensing is also sensitive to planets orbiting low-mass stars, free-floating planets, planets in the Galactic bulge and disk, and even planets in external galaxies. These planets can also provide critical constraints on models of planet formation. Although microlensing searches have so far detected only a handful of planets, these have already changed our understanding of planet formation beyond the snow line. Next generation microlensing surveys, which would be sensitive to tens of "cold Earths" in this region, are well advanced in design conception and are starting initial practical implementation.
dc.description8 pages, 2 figures. White paper submitted to the Planetary Systems and Star Formation (PSF) panel of the Astro2010 Decadal Survey
dc.identifierhttps://arxiv.org/abs/0903.0880
dc.identifierhttp://arxiv.org/abs/0903.0880
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222325
dc.subjectEarth and Planetary Astrophysics
dc.titleThe Demographics of Extrasolar Planets Beyond the Snow Line with Ground-based Microlensing Surveys
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