UV-controlled physical and chemical structure of protoplanetary disks
نویسندگان
چکیده
منابع مشابه
The Chemical Evolution of Protoplanetary Disks
In this review we re-evaluate our observational and theoretical understanding of the chemical evolution of protoplanetary disks. We discuss how improved observational capabilities have enabled the detection of numerous molecules exposing an active disk chemistry that appears to be in disequilibrium. We outline the primary facets of static and dynamical theoretical chemical models. Such models h...
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Introduction: It is widely known that extrasolar planetary host stars are, to some degree, chemically anomalous. Spectroscopic studies of these stars have revealed that the metallicity of the host star is higher than that of other F, G and K type stars not known to harbor planetary companions (e.g. [1-3]). Trends may also exist in the abundance of Li, C, N, [4] Na, Mg and Al [5]. One aspect of ...
متن کاملModels of the Structure and Evolution of Protoplanetary Disks
We review advances in the modeling of protoplanetary disks. This review will focus on the regions of the disk beyond the dust sublimation radius, i.e. beyond 0.1 1 AU, depending on the stellar luminosity. We will be mostly concerned with models that aim to fit spectra of the dust continuum or gas lines, and derive physical parameters from these fits. For optically thick disks, these parameters ...
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Aims. We have studied the dependence of the profiles of molecular abundances and line emission on the accretion flow in the hot (∼ 100K) inner region of protoplanetary disks. Methods. The gas-phase reactions initiated by evaporation of the ice mantle on dust grains are calculated along the accretion flow. We focus on methanol, a molecule that is formed predominantly through the evaporation of w...
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This paper considers the gas phase chemistry in a protoplanetary accretion disk, especially the chemistry initiated in the gas phase by destruction of dust close to the central star. Slow radial particle transport moves gas and dust from the cold outer parts of a protoplanetary accretion disk into its warm central part where chemical reactions in the gas phase are activated. At the same time ga...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2011
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-011-0652-7