Pebble formation by ice condensation

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Sammanfattning

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.
Originalspråkengelska
Titel på gästpublikationInstabilities And Structures In Proto-Planetary Disks
FörlagEDP Sciences
Volym46
DOI
StatusPublished - 2013
EvenemangWorkshop on Instabilities and Structures in Proto-Planetary Disks - Marseille, Frankrike
Varaktighet: 2012 sep 172012 sep 20

Publikationsserier

Namn
Volym46
ISSN (tryckt)2101-6275
ISSN (elektroniskt)2100-014X

Konferens

KonferensWorkshop on Instabilities and Structures in Proto-Planetary Disks
Land/TerritoriumFrankrike
OrtMarseille
Period2012/09/172012/09/20

Ämnesklassifikation (UKÄ)

  • Astronomi, astrofysik och kosmologi

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