Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.1304b&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #13.04; Bulletin of the American Astronomical Society, Vol. 29, p.1230
Astronomy and Astrophysics
Astronomy
Scientific paper
New abundance results of the neutron capture (n-capture) elements (e.g. Ba, La, Eu, etc.) for 44 metal-poor Population II halo stars are presented. The Bond giants' echelle spectra analyzed were of resolution R 20,000 with S/N in the 100-200 range. The spectra were systematically analyzed so that direct star-to-star comparisons can be made. Isotopic hyper-fine splitting was considered in relative lines (e.g. Eu, Ba). The large sample size bridges the gap between analyses done on the old halo population (McWilliam et al 1995) and the younger Population I disk stars from the Woolf et al (1996) survey. At lower metallicites the abundance patterns appear to be correlated and the abundance pattern corresponds to the scaled solar system r-process signature. At higher metallicity, [Ba/Eu] trends can be attributed to the onset of the contribution of the s-process. Over the range of metallicity (-2.90<[Fe/H]<-0.86) there exist real star-to-star differences in the ratios of the [n-capture/Fe] abundances as well as in the actual spectra of the stars.
Armandroff Taft
Burris Debra L.
Cowan John J.
Pilachowski Catherine A.
Sneden Chistopher
No associations
LandOfFree
Neutron Capture Element Abundances in Galactic Halo Stars 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 Neutron Capture Element Abundances in Galactic Halo Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutron Capture Element Abundances in Galactic Halo Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1173072