Neutron-capture elements in the very metal-poor star HD122563

Details Neutron-capture elements in the very metal-poor star HD122563 Neutron-capture elements in the very metal-poor star HD122563

2006-02-06

arxiv.org/abs/astro-ph/0602107v1

Astrophys.J. 643 (2006) 1180-1189

Astronomy and Astrophysics

Astrophysics

29 pages, 7 figures, Accepted for publication in ApJ

Scientific paper

10.1086/503195

We obtained high resolution, high S/N spectroscopy for the very metal-poor star HD122563 with the Subaru Telescope High Dispersion Spectrograph. Previous studies have shown that this object has excesses of light neutron-capture elements, while its abundances of heavy ones are very low. In our spectrum covering 3070 - 4780 A of this object, 19 neutron-capture elements have been detected, including seven for the first time in this star (Nb, Mo, Ru, Pd, Ag, Pr, and Sm). Upper limits are given for five other elements including Th. The abundance pattern shows a gradually decreasing trend, as a function of atomic number, from Sr to Yb, which is quite different from those in stars with excesses of r-process elements. This abundance pattern of neutron-capture elements provides new strong constraints on the models of nucleosynthesis responsible for the very metal-poor stars with excesses of light neutron-capture elements but without enhancement of heavy ones.

Affiliated with

Also associated with

No associations

Rating

Neutron-capture elements in the very metal-poor star HD122563 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 elements in the very metal-poor star HD122563, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutron-capture elements in the very metal-poor star HD122563 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-730432