On the Origin of Nitrogen in Damped Ly-alpha Systems

Details On the Origin of Nitrogen in Damped Ly-alpha Systems On the Origin of Nitrogen in Damped Ly-alpha Systems

2002-11-22

arxiv.org/abs/astro-ph/0211512v1

Astronomy and Astrophysics

Astrophysics

7 pages, in ``CNO in the Universe,'' ASP Conference Series, in press edited by C. Charbonnel, D. Schaerer, and G. Meynet

Scientific paper

Recent measurements of nitrogen and alpha elements in over 20 damped Ly-alpha systems (DLA) are compared with similar measurements for numerous emission line objects and stars. It is found that the DLA distribution in the N/alpha-alpha/H plane is bimodal, where most sample DLAs fall along the N/alpha plateau defined at low Z by dwarf irregulars, while a small group possesses N/alpha values roughly 0.7 dex less than those on the plateau at similar alpha/H values. We demonstrate with chemical evolution models that a top-heavy or truncated IMF can account for the low N in this second group.

Affiliated with

Also associated with

No associations

Rating

On the Origin of Nitrogen in Damped Ly-alpha Systems 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 On the Origin of Nitrogen in Damped Ly-alpha Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Origin of Nitrogen in Damped Ly-alpha Systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-452905