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Pebble formation by ice condensation

Författare

Summary, in English

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.

Publiceringsår

2013

Språk

Engelska

Publikation/Tidskrift/Serie

Instabilities And Structures In Proto-Planetary Disks

Volym

46

Dokumenttyp

Konferensbidrag

Förlag

EDP Sciences

Ämne

  • Astronomy, Astrophysics and Cosmology

Conference name

Workshop on Instabilities and Structures in Proto-Planetary Disks

Conference date

2012-09-17 - 2012-09-20

Conference place

Marseille, France

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2100-014X
  • ISSN: 2101-6275