Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-03-05
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
11 pages, 5 figures
Scientific paper
10.1051/0004-6361:200809707
We have performed a detailed abundance analysis of the content of s-process elements of two dwarf stars with suspected overabundace of those elements. Such stars belong to a special kinematic sample of the solar neighborhood, with peculiar kinematics and different chemical abundances when compared to "normal" disk stars. We aim to define if those stars can be identified as barium stars, based on their s-process elements abundances, and their classification, i.e., if they share their chemical profile with strong or mild barium stars. We also intend to shed light on the possible origins of the different kinds of barium stars. Spectra have been taken by using the FEROS spectrograph at the 1.52m telescope of ESO, La Silla. Abundances have been derived for 18 elements, by matching the synthetic profile with the observed spectrum. We have found that HD 11397 shows a mild enhancement for most of the s-process elements as well as for some r-process elements. This star seems to share its abundance profile with the mild Ba-stars. Although showing some slight chemical anomalies for Y, Sr, Mo, and Pb, HD 14282 depicts a chemical pattern similar to the normal stars with slight s-process enhancements.
Allen David M.
Pompéia Luciana
No associations
LandOfFree
HD 11397 and HD 14282 - Two new barium 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 HD 11397 and HD 14282 - Two new barium stars?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HD 11397 and HD 14282 - Two new barium stars? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-134692