Star-Disk Interaction in Young Stars (IAU S243)
Title | Star-Disk Interaction in Young Stars (IAU S243) PDF eBook |
Author | International Astronomical Union. Symposium |
Publisher | Cambridge University Press |
Pages | 396 |
Release | 2007 |
Genre | Science |
ISBN | 9780521874656 |
Reviews latest star-disk interaction region in young stars for graduate students and researchers.
Star-disk Interaction in Young Stars
Title | Star-disk Interaction in Young Stars PDF eBook |
Author | International Astronomical Union Symposium |
Publisher | |
Pages | |
Release | 2007 |
Genre | |
ISBN |
Star-disk Interactions in Young Stars
Title | Star-disk Interactions in Young Stars PDF eBook |
Author | International Astronomical Union. Symposium |
Publisher | |
Pages | 375 |
Release | 2007 |
Genre | Early stars |
ISBN |
Proceedings of the Twenty Seventh General Assembly Rio de Janeiro 2009
Title | Proceedings of the Twenty Seventh General Assembly Rio de Janeiro 2009 PDF eBook |
Author | Ian F. Corbett |
Publisher | Cambridge University Press |
Pages | 548 |
Release | 2010-06-03 |
Genre | Science |
ISBN | 9780521768313 |
A complete record of the formal organisational and administrative proceedings of the XXVII General Assembly of the International Astronomical Union.
Information Bulletin
Title | Information Bulletin PDF eBook |
Author | International Astronomical Union |
Publisher | |
Pages | 116 |
Release | 2009 |
Genre | Astronomy |
ISBN |
Observation and Modelling of Disks about Young Stars with ALMA
Title | Observation and Modelling of Disks about Young Stars with ALMA PDF eBook |
Author | Sacha Gavino |
Publisher | |
Pages | 0 |
Release | 2020 |
Genre | |
ISBN |
The star formation process usually proceeds with protoplanetary disks. These disks contain a mixture of gas, accounting for 99 % of the disk mass, and of solid particles called dust grains (1 % of the disk mass). These grains, initially at sub-micro metric sizes, gradually coagulate, grow, and potentially allow for the formation of planets about the star.The study of the dust and molecular composition of young disks is fundamental to constraint the physical and chemical initial conditions of planetary formation and the origins of the chemical composition of the planetary cores.The goal of this thesis was to build state-of-the-art models of typical young disks consisting of gas and of a population of grains of multiple sizes, then, in a new approach, to test with the use of numerical simulations the implication of the size and temperature distributions on the chemical evolution of disks.To achieve this, we have coupled the 3D Monte-Carlo radiative transfer code POLARIS to the time-dependent gas-grain code NAUTILUS. The radiative transfer code allowed us to finely compute the grain temperature as a function of the size and location as well as the UV flux within the disk. The gas-grain code was able to simulate the evolution of the chemical abundances in our disk models. Moreover, the computation of the UV flux by POLARIS coupled to a set of molecular cross-sections extracted from a comprehensive database allowed us to compute as a function of the frequency the rates of molecular photoabsorption, photodissociation, and photoionization.
Accretion Processes in Star Formation
Title | Accretion Processes in Star Formation PDF eBook |
Author | Lee Hartmann |
Publisher | Cambridge University Press |
Pages | 260 |
Release | 2000-11-15 |
Genre | Science |
ISBN | 9780521785204 |
Recent discoveries of extrasolar planets and new direct evidence for protoplanetary disks around young stars have had a major impact on our understanding of star and planet formation. This volume provides a thorough, up-to-date, and concise overview of the physical processes involved in the formation of stars and their surrounding disks. The book traces the story of star formation from the fragmentation of cold molecular gas clouds, through the formation of protostars and rotating dusty disks to the subsequent accretion of material onto the central star. Lee Hartmann integrates state-of-the-art theoretical models with recent observations, highlighting important problems that remain to be solved.