Pebble formation by ice condensation

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Pebbles with sizes of centimeters to decimeters are needed in order to form kilometer-sized planetesimals, which in turn are needed for planet formation to proceed. The well-studied mechanism of coagulation is efficient only up to millimeter-sized dust grains. In this proceeding a numerical model of ice condensation as a complementary growth mechanism in turbulent protoplanetary discs is discussed. Close to an ice line, particles grow efficiently by ice condensation, which, combined with radial mixing, can supply a large extent of the disc with icy pebbles. Growth from millimeter-sized dust grains to at least decimeter-sized pebbles is possible on a time scale of only 10 000 years. The resulting particles are large enough to enable further growth into planetesimals via a variety of particle concentration mechanisms and subsequent gravitational collapse.

Details

Authors
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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology
Original languageEnglish
Title of host publicationInstabilities And Structures In Proto-Planetary Disks
PublisherEDP Sciences
Volume46
Publication statusPublished - 2013
Publication categoryResearch
Peer-reviewedYes
EventWorkshop on Instabilities and Structures in Proto-Planetary Disks - Marseille, France
Duration: 2012 Sep 172012 Sep 20

Publication series

Name
Volume46
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Conference

ConferenceWorkshop on Instabilities and Structures in Proto-Planetary Disks
CountryFrance
CityMarseille
Period2012/09/172012/09/20