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Planet Formation Around Low-Mass Stars: The Moving Snow Line and Super-Earths

Kennedy, Grant; Kenyon, Scott J; Bromley, Benjamin C

Description

We develop a semianalytic model for planet formation during the pre-main-sequence contraction phase of a low-mass star. During this evolution, the stellar magnetosphere maintains a fixed ratio between the inner disk radius and the stellar radius. As the star contracts at constant effective temperature, the "snow line," which separates regions of rocky planet formation from regions of icy planet formation, moves inward. This process enables rapid formation of icy protoplanets that collide and...[Show more]

dc.contributor.authorKennedy, Grant
dc.contributor.authorKenyon, Scott J
dc.contributor.authorBromley, Benjamin C
dc.date.accessioned2015-12-07T22:14:55Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/17657
dc.description.abstractWe develop a semianalytic model for planet formation during the pre-main-sequence contraction phase of a low-mass star. During this evolution, the stellar magnetosphere maintains a fixed ratio between the inner disk radius and the stellar radius. As the star contracts at constant effective temperature, the "snow line," which separates regions of rocky planet formation from regions of icy planet formation, moves inward. This process enables rapid formation of icy protoplanets that collide and merge into super-Earths before the star reaches the main sequence. The masses and orbits of these super-Earths are consistent with super-Earths detected in recent microlensing experiments.
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: Planetary systems: Formation; Planetary systems: Protoplanetary disks; Stars: Evolution; Stars: Formation
dc.titlePlanet Formation Around Low-Mass Stars: The Moving Snow Line and Super-Earths
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume650
dc.date.issued2006
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu4114753xPUB2
local.type.statusPublished Version
local.contributor.affiliationKennedy, Grant, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKenyon, Scott J, Smithsonian Institution
local.contributor.affiliationBromley, Benjamin C, University of Utah
local.description.embargo2037-12-31
local.bibliographicCitation.startpageL139
local.bibliographicCitation.lastpageL142
local.identifier.doi10.1086/508882
dc.date.updated2015-12-07T07:37:25Z
local.identifier.scopusID2-s2.0-33845252948
CollectionsANU Research Publications

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