Campins, H.: The chemical composition of comets. In: Chela-Flores, J., Lemarchand, G.A., Oro, J., (eds.). Astrobiology: Origins from the Big Bang to Civilization, Kluwer Academic Publishers: Dordrecht, The Netherlands (2000)The chemical composition of comets - Campins - 2000 () ...
Results. Near the end of the disk's lifetime our chemical model yields H2O, CO, CO2 and CH4 ice abundances at 10 AU (consistent with a midplane density of 10^10 cm^-3 and a temperature of 20 K) that are compatible with measurements of the chemical composition of cometary bodies for...
of the molecular composition of comets (Biver et al. 2002, EMP 90, 323) and improve our understanding on the evolution of molecular abundances with heliocentric distance (rh) (between rh = 0.1 and 2.8 AU from the Sun). The sample is also very diverse, with comets of the shortest (3.3 ...
New data on the composition of the Venus dayside troposphere obtained by Venera 11 and 12 are applied to the chemical vertical zoning of the Venus troposphere. They are interpreted as being made in the ascending, reducing part of a tropo... VL Barsukov,IL Khodakovskii,VP Volkov,... - 《...
In this review, we first present the information on the chemical composition of meteorites, comets and other small bodies of the Solar System, which is potentially linked to the first phases of the Solar System’s formation. Then we describe the observed chemical composition in the prestellar co...
Context: The chemical composition of a molecular cloud changes dramatically as it collapses to form a low-mass protostar and circumstellar disk. Two-dimensional (2D) chemodynamical models are required to properly study this process. Aims: The goal of this work is to follow, for the first time...
Multiple origins of nitrogen isotopic anomalies in meteorites and comets Isotopic fractionation and mixing calculations compared with coupled hydrogen and nitrogen isotopic composition of organic molecules from primitive chondri... Aléon,Jér?me - 《Astrophysical Journal》 被引量: 95发表: 2013年 Diradica...
Diatomic carbon (C2) exists in carbon vapor, comets, the stellar atmosphere, and interstellar matter, but although it was discovered in 18571, it has proven frustratingly difficult to characterize, since C2gas occurs only at extremely high temperatures (above 3500 °C)2. Considerable efforts hav...
The detailed findings to be released in the weeks and months ahead are expected to shed new light on the makeup of comets and on the composition of Jupiter's atmosphere and magnetosphere. Although it was too early to know for sure, the comet fragments (labeled A to W) ... 展开 ...
1.2.3.1 Cosmochemical Classification of Elements The chemical fractionations observed among chondrites and the compositions of many chondritic components are best understood in terms of quenched equilibrium between phases in a nebula of solar composition (Palme, 2001; Chapter 1.10). The equilibrium model...