Chemical Abundances of Bright Giants in the Mildly Metal-Poor Globular Cluster M4
| dc.creator | Ivans, Inese I. | |
| dc.date | 1999-09-16 | |
| dc.date.accessioned | 2026-07-07T02:33:19Z | |
| dc.date.available | 2026-07-07T02:33:19Z | |
| dc.description | We present a chemical composition analysis of three dozen giant stars in the nearby ``CN-bimodal'' mildly metal-poor (<[Fe/H]> = -1.18) globular cluster M4. The analysis combined traditional spectroscopic abundance methods with modifications to the line-depth ratio technique pioneered by Gray (1994). Silicon and aluminum are found to be primordially overabundant by factors exceeding the mild overabundances usually seen in alpha- and light odd elements among halo field and globular cluster giants of comparable metallicity. In addition, barium is found to be overabundant by a factor of about four. Superimposed on the primordial abundance distribution in M4, there is evidence for the existence of proton-capture synthesis of C, O, Ne, and Mg. | |
| dc.description | 6 pages, 2 figures, To appear in Proceedings of the 35th Liege Astrophysics Colloquium: "The Galactic Halo: From Globular Clusters to Field Stars" | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9909297 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9909297 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14795 | |
| dc.subject | Astrophysics | |
| dc.title | Chemical Abundances of Bright Giants in the Mildly Metal-Poor Globular Cluster M4 | |
| dc.type | text |