WebMar 31, 1996 · Fortuitously, the irradiated donor star provides an alternative observational probe via narrow emission lines generated by Bowen fluorescence, which provide a … WebSeveral cases are known of line resonance, in which some emission line is stronger than can be produced by continuum processes. The prime example is the O III resonance-fluorescence mechanism found by Bowen. There is a very close coincidence between He II Lyman α at 303.78 Å and a pair of O III lines at 303.62, 303.80 Å.
N III line emission in planetary nebulae - Not Bowen …
WebJun 1, 1991 · This approach makes it possible to put limits on line and continuum optical depths as well as temperatures. These limits along with the observed Bowen emission … Web18 hours ago · The EPA’s proposed emission standards for heavy trucks would require a quarter of new heavy trucks sold in the U.S. to be all-electric by 2032. According to the EPA’s 717-page proposal, the upfront cost difference between an electric truck and an internal combustion engine truck is $582 for a short-haul daycab tractor. bras that hold shoulders back
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WebBowen fluorescence Quick Reference A mechanism that gives rise to certain strong emission lines from ionized atoms of oxygen, carbon, and nitrogen in diffuse nebulae. Extremely hot stars and accretion disks (at temperatures of 30 000 K or more) produce copious amounts of extreme ultraviolet radiation at 30.4 nm from singly ionized helium … WebHence, we analyzed the observed N III lines assuming line fluorescence as the only suitable source: (1) The O III and N III resonance line profiles near λ 374 were decomposed, … WebArchival high-dispersion spectra from the IUE are used in a search for Bowen emission lines of Fe II excited by the stronger transition of the O VI resonance doublet. The possibility of using these Fe II emission lines as a diagnostic of the strength of the far-ultraviolet emission of O VI at 1032 A is explored. It is found that the Fe II emission lines are quite … bras that lift and center