SIMBAD references

2006ApJ...641L.117O - Astrophys. J., 641, L117-L120 (2006/April-3)

Neutron-capture elements in the metal-poor globular cluster M15.

OTSUKI K., HONDA S., AOKI W., KAJINO T. and MATHEWS G.J.

Abstract (from CDS):

We report on observations of six giants in the globular cluster M15 (NGC 7078) using the Subaru Telescope to measure neutron-capture elemental abundances. Our abundance analyses, based on high-quality blue spectra, confirm the star-to-star scatter in the abundances of heavy neutron-capture elements (e.g., Eu), and we found no significant s-process contribution to them, as was found in previous studies. We have found that, for the first time, there are anticorrelations between the abundance ratios of light to heavy neutron-capture elements ([Y/Eu] and [Zr/Eu]) and the heavy neutron-capture elements (e.g., Eu). This indicates that the light neutron-capture elements in these stars cannot be explained by only a single r-process. Another process that contributed significantly to the light neutron-capture elements is required in M15. Our results suggest a complicated enrichment history for M15 and its progenitor.

Abstract Copyright:

Journal keyword(s): Nuclear Reactions, Nucleosynthesis, Abundances

Simbad objects: 14

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2021.09.23-22:08:30

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