Neutron-Capture Elements in the Metal-poor Globular Cluster M15
نویسندگان
چکیده
منابع مشابه
Neutron-capture Elements in the Metal-poor Globular Cluster M15
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 no significant s-process contribution to them, as was found in previous studies. We...
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National Astronomical Observatory, Mitaka, Tokyo, 181-8588 Japan; email: [email protected], [email protected], [email protected], [email protected] Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK; email: [email protected] Research School of Astronomy and Astrophysics, The Australian National University, Private Bag, Weston Creek Pos...
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The CH star CS 31062-050 ([Fe/H] = −2.42) is one of the most useful stars yet discovered for evaluating the s-process in metal-poor stars. It is very abundant in heavy elements (e.g., [La/Fe] = 2.2), and its relatively cool temperature and low gravity mean that there are many lines of interesting elements present in the spectrum. We measured the abundances of 22 elements with Z≥29, including th...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/504106