Structure of Hot Molecular Cores
نویسندگان
چکیده
منابع مشابه
Physics and chemistry of hot molecular cores
Young massive star-forming regions are known to produce hot molecular gas cores (HMCs) with a rich chemistry. While this chemistry is interesting in itself, it also allows to investigate important physical parameters. I will present recent results obtained with high-angular-resolution interferometers disentangling the small-scale structure and complexity of various molecular gas components. Ear...
متن کاملChemical Models of Hot Molecular Cores
We present the results of observational studies of a number of molecular clouds associated with ultracompact HII regions in regions of massive star formation. We derive molecular abundances and show that gas-phase-only chemical models of these regions are incapable of reproducing the observations. It appears that a rich chemistry occurs in the ice matrices frozen onto dust grains at high densit...
متن کاملHigh Resolution 18 μ m Imaging of Hot Molecular Cores
I present the latest results from a search for hot molecular cores at mid-infrared wavelengths from the largest optical telescopes available at the present time. Three well-observed hot molecular cores were imaged, G29.96-0.02, G19.61-0.23, and G34.26+0.15. Even though mid-infrared sources have been claimed to be detected previously at the hot molecular core locations of both G19.61-0.23 and G3...
متن کاملHot Molecular Cores and the Formation of Massive Stars
It has been proposed that some hot molecular cores (HMCs) harbor a young embedded massive star, which heats an infalling envelope and accretes mass at a rate high enough to “choke off” an incipient HII region. This class of HMCs would mark the youngest phase known of massive star formation. In order to test this hypothesis, we model this type of object calculating the radiative transfer through...
متن کاملThe Chemistry of Phosphorus in Hot Molecular Cores
Hot molecular cores in star-forming regions are known to have gas-phase chemical compositions determined by the material evaporated from the icy mantles of interstellar grains, followed by subsequent reactions in the gas phase. Current models suggest that the evaporated material is rich in hydrogenated species. In this paper we consider the chemistry induced in a hot core by the release of phos...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2011
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas/1152058