A Reevaluation of the Super–LITHIUM‐rich Star in NGC 6633
Author(s) -
Chris Laws,
Guillermo González
Publication year - 2003
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/377449
Subject(s) - astrophysics , abundance (ecology) , lithium (medication) , accretion (finance) , physics , star (game theory) , accretion disc , biology , fishery , endocrinology
We present a new abundance analysis of the super Li-rich star J37 and acomparison star in NGC 6633. We confirm the result of Deliyannis et al. thatJ37 has a Li abundance well above the meteoritic value, and we also confirmthat Al, S, Si, Ca, Fe and Ni are super-solar, and C is sub-solar. Weadditionally find that Na, Sc, Ti are super-solar, while O is sub-solar. Theabundance pattern of metals in J37 is generally consistent with the bulkcomposition of the Earth. We propose that accretion of circumstellar matter isthe best explanation for these abundance anomalies, although we cannot rule outa secondary contribution from diffusion.Comment: 9 pages, 1 figure; Accepted for publication in the Astrophysical Journa
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