Heavy Element Recombination Lines in Nebulae

Details Heavy Element Recombination Lines in Nebulae Heavy Element Recombination Lines in Nebulae

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...70w&link_type=abstract

NOAO Proposal ID #1999B-0070

Physics

Scientific paper

Element abundances determined for emission line objects, formerly considered among the most reliable available, have been cast into doubt because of the different results obtained using collisionally excited forbidden lines and recombination lines. This makes uncertain much of our information about the galactic abundance gradient and about heavy element abundances in distant galaxies. We propose here to examine this issue in detail using high resolution, high s:n spectra of a carefully selected sample of planetary nebulae and of the Crab Nebula. The planetaries will be selected to span a range from large to small discrepancies between the abundances determined by the forbidden line and recombination line methods. The Crab observations will allow us to determine experimentally which lines are really excited by recombinations.

Affiliated with

Also associated with

No associations

Rating

Heavy Element Recombination Lines in Nebulae 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 Heavy Element Recombination Lines in Nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy Element Recombination Lines in Nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1015741