منابع مشابه
Predicting Stellar Angular Sizes
Reliable prediction of stellar diameters, particularly angular diameters, is a useful and necessary tool for the increasing number of milliarcsecond resolution studies being carried out in the astronomical community. A new and accurate technique of predicting angular sizes is presented for main sequence stars, giant and supergiant stars, and for more evolved sources such as carbon stars and Mir...
متن کاملPractical Aspects of Calibrating Near-Infrared Interferometer Data: Predicting Stellar Angular Sizes
Reliable prediction of stellar diameters, particularly angular diameters, is a useful and necessary tool for the increasing number of milliarcsecond resolution studies being carried out in the astronomical community. Specifically, the task of calibrating visibility amplitude information from astronomical interferometers often requires the ability to reliably estimate diameters and uncertainties...
متن کاملPredicting the sizes of large RNA molecules.
We present a theory of the dependence on sequence of the three-dimensional size of large single-stranded (ss) RNA molecules. The work is motivated by the fact that the genomes of many viruses are large ssRNA molecules-often several thousand nucleotides long-and that these RNAs are spontaneously packaged into small rigid protein shells. We argue that there has been evolutionary pressure for the ...
متن کاملThe effect of stellar evolution on SiC dust grain sizes
Stars on the asymptotic giant branch (AGB) produce dust in their circumstellar shells. The nature of the dust-forming environment is influenced by the evolution of the stars, in terms of both chemistry and density, leading to an evolution in the nature of the dust that is produced. Carbon-rich AGB stars are known to produce silicon carbide (SiC). Furthermore, observations of the ∼11μm SiC featu...
متن کاملOn the Interferometric Sizes of Young Stellar Objects
Long-baseline optical interferometers can now detect and resolve hot dust emission thought to arise at the inner edge of circumstellar disks around young stellar objects (YSOs). We argue that the near-infrared sizes being measured are closely related to the radius at which dust is sublimated by the stellar radiation field. We consider how realistic dust optical properties and gas opacity dramat...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1999
ISSN: 0004-6280,1538-3873
DOI: 10.1086/316462