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Dust grain growth in the interstellar medium of galaxies at redshifts 4
Dust grain growth interstellar medium galaxies redshifts
2011/10/21
To discriminate between different dust formation processes is a key issue in order to understand its properties. We analysed six submillimeter galaxies at redshifts 4and nine quasars at 5
Dust driven mass loss from carbon stars as function of stellar parameters - II. Effects of grain size on wind properties
AGB and post-AGB – Stars: atmospheres – Stars: carbon – Stars: circumstellar matter – Stars: evolution – Stars: mass loss –2 Hydrodynamics – Radiative transfer
2011/9/30
In this paper we explore grain size effects on wind properties of carbon stars, using a generalized description of radiative cross sections valid for particles of arbitrary sizes. The purpose of the s...
Dust Grain Evolution in Spatially Resolved T Tauri Binaries
Dust Grain Evolution Spatially Resolved Tauri Binaries
2011/10/10
Core-accretion planet formation begins in protoplanetary disks with the growth of small, ISM dust grains into larger particles. The progress of grain growth, which can be quantified using 10 micron si...
Effects of Initial Condition and Cloud Density on the Composition of the Grain Mantle
Molecular clouds ISM abundances molecules chemical evo-lution Monte-Carlo simulations
2010/11/15
Evolution of grain mantles in various interstellar environment is studied. We concentrate mainly on water, methanol, carbon di-oxide, which constitute nearly 90% of the grain mantle. We investigate ho...
Chemistry of a protoplanetary disk with grain settling and Lyman alpha radiation
astrochemistry circumstellar matter ISM abundances ISM: molecules planetary systems
2010/11/10
We present results from a model of the chemical evolution of protoplanetary disks. In our models we directly calculate the changing propagation and penetration of a high energy radiation field with Ly...
Relaxing the Small Particle Approximation for Dust-grain opacities in Carbon-star Wind Models
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We have computed wind models with time-dependent dust formation and grain-size dependent opacities, where (1) the problem is simplified by assuming a fixed dust-grain size, and where (2) the radiation...