Some implications of revised OI /7990 A/ and OI /11287 A/ branching ratios

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7

Astronomical Spectroscopy, Branching (Physics), Nebulae, Oxygen Spectra, Comets, Emission Spectra, Oxygen Atoms, Seyfert Galaxies, Transition Probabilities

Scientific paper

Recent laboratory, geophysical, and theoretical determinations of the O I (7990 A) and O I (11,287 A) branching ratios indicate that the generally used values based on the NBS transition parameters need revision. The O I (7990 A) branching ratio is about 300 times smaller than the NBS value, and the O I (11,287 A) is about one-quarter as large. The transitions are important in the generation of permitted atomic oxygen spectra in several types of astronomical source, including the Orion Nebula (M42), the Seyfert galaxy NGC 4151, Arcturus, and comets. The absence of the O I (7990 A) emission in M42 and NGC 4151 is consistent with its very small branching ratio, and previous conclusions based on its absence, such as the rejection of starlight excitation in the Seyfert galaxy, require reinvestigation. The reduction of the O I (11,287 A) branching ratio is pertinent to hydrogen L-beta fluorescence excitation of O I (1304 A) and O I (8446 A) emission and requires an upward revision of oxygen production rates in comets.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Some implications of revised OI /7990 A/ and OI /11287 A/ branching ratios does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Some implications of revised OI /7990 A/ and OI /11287 A/ branching ratios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Some implications of revised OI /7990 A/ and OI /11287 A/ branching ratios will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1435230

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.