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Details of talk

TitleModels of wind-driving protostellar disks
PresenterRaquel Salmeron Zapata (Australian National University)
Author(s)Raquel Salmeron Zapata
SessionMathematical Physics and Industrial Mathematics
Time11:00:00 2017-09-26
Abstract


Star formation is induced by the gravitational collapse of molecular clouds
cores. During this phase, angular momentum conservation results in the
progressive increase of the centrifugal force, which eventually halts the
infalling matter and leads to the development of a central mass (“protostar”)
surrounded by a disk of material. In the presence of an angular momentum
transport mechanism, mass accretion onto the protostar proceeds through this
disk, and it is believed that this is how stars typically gain most of their
mass. A surprising feature of many of these protostellar accreting systems is
their association with powerful outflows of material, which become highly
collimated and supersonic as they accelerate away from the source. These jets
are thought to play a key role in the dynamics and evolution of these systems,
and to the overall process of star and planet formation.

In my talk I will present semi-analytical models that calculate the dynamical
and thermal structure of protostellar, wind-driving disks, and discuss their
application for the analysis of observational data from young stars. I will also
present models for the processing of dust particles in wind-driving protostellar
disks, the analogues of the early solar system. Our models suggest that these
powerful jets may be suitable sites for the formation of chondrules, the
primitive, thermally-processed constituents of meteorites whose origin in the
cold environment of the early solar nebula has remained elusive for many
decades.

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