Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

3 tables, 4 figures, 20 pages, ApJ, in press

Scientific paper

10.1086/420686

An abundance analysis for the carbon-enhanced, extremely iron-poor ([Fe/H] -3.5) star CS29498-043 has been obtained using new high-resolution, high signal-to-noise spectra from the Subaru Telescope. The [O I] forbidden line at 6300A and the O I triplet feature at 7771-7776A are both clearly detected. The overabundance of oxygen is significant ([O/Fe]>2). In addition, Na, Co, and Ni abundances have been newly measured. The abundance pattern from C to Ni of this object is quite similar to that of CS 22949--037, another extremely metal-poor star with large excesses of C, N, O, and the alpha-elements. The abundance patterns of these two stars suggest the existence of supernovae progenitors that ejected relatively little material fromtheir iron cores during the very early era of nucleosynthesis in the Galaxy. Themetallicity in these objects, when one includes the elements C, N, and O in the tally of total metals, is not as low as in the most metal-poor stars, suggesting the existence of quite different formation processes for these iron-deficient objects than pertain to the bulk of other metal-deficient stars.

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

Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043 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 Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043 will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-484022

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