The two metallicity groups of the globular cluster M 22: A chemical perspective

Simple item page
dc.contributor.authorMarino, A. F.
dc.contributor.authorSneden, Chris
dc.contributor.authorKraft, R. P.
dc.contributor.authorWallerstein, G
dc.contributor.authorNorris, John
dc.contributor.authorDa Costa, Gary
dc.contributor.authorMilone, A. P.
dc.contributor.authorIvans, Inese
dc.contributor.authorGonzalez, G.
dc.contributor.authorFulbright, J.P.
dc.contributor.authorHilker, M
dc.contributor.authorPiotto, G
dc.contributor.authorZoccali, M
dc.date.accessioned2015-12-10T23:36:33Z
dc.date.issued2011
dc.date.updated2016-02-24T08:23:53Z
dc.description.abstractWe present a detailed chemical composition analysis of 35 red giant stars in the globular cluster M 22. High resolution spectra for this study were obtained at five observatories, and analyzed in a uniform manner. We have determined abundances of representative light proton-capture, α, Fe-peak and neutron-capture element groups. Our aim is to better understand the peculiar chemical enrichment history of this cluster, in which two stellar groups are characterized by a different content in iron, neutron capture elements Y, Zr and Ba, and α element Ca. The principal results of this study are: (i) substantial star-to-star metallicity scatter (-2.0 [Fe/H]-1.6); (ii) enhancement of s-process/r-process neutron-capture abundance ratios in a fraction of giants, positively correlated with metallicity; (iii) sharp separation between the s-process-rich and s-process-poor groups by [La/Eu] ratio; (iv) possible increase of [Cu/Fe] ratios with increasing [Fe/H], suggesting that this element also has a significant s-process component; and (v)presence of Na-O and C-N anticorrelations in both the stellar groups.
dc.identifier.issn0004-6361
dc.identifier.urihttp://hdl.handle.net/1885/70188
dc.publisherSpringer
dc.rightsAuthor/s retain copyrighten_AU
dc.sourceAstronomy and Astrophysics
dc.subjectKeywords: Abundance ratios; Chemical composition analysis; Globular clusters; Globular clusters: individual; High-resolution spectra; Metallicities; Neutron capture; Red giants; S-process; Stars: abundances; Stars: Population II; Techniques: spectroscopic; Astrophy Globular clusters: individual: M 22 (NGC 6656); Stars: abundances; Stars: Population II; Techniques: spectroscopic
dc.titleThe two metallicity groups of the globular cluster M 22: A chemical perspective
dc.typeJournal article
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.lastpage24
local.bibliographicCitation.startpageA8
local.contributor.affiliationMarino, A. F. , Università di Padova
local.contributor.affiliationSneden, Chris, University of Texas
local.contributor.affiliationKraft, R. P., Lick Observatory/University of California
local.contributor.affiliationWallerstein, G, University of Washington
local.contributor.affiliationNorris, John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationDa Costa, Gary, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMilone, A. P. , Instituto de Astrofísica de Canarias
local.contributor.affiliationIvans, Inese, University of Utah
local.contributor.affiliationGonzalez, G., University of Washington
local.contributor.affiliationFulbright, J.P., Johns Hopkins University
local.contributor.affiliationHilker, M, European Southern Observatory
local.contributor.affiliationPiotto, G, Università di Padova
local.contributor.affiliationZoccali, M, Universidad Catolica de Chile
local.contributor.authoremailu7401084@anu.edu.au
local.contributor.authoruidNorris, John, u7401084
local.contributor.authoruidDa Costa, Gary, u9501331
local.description.notesImported from ARIES
local.identifier.absfor020104 - Galactic Astronomy
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
local.identifier.ariespublicationf2965xPUB2247
local.identifier.ariespublicationu4630950xPUB156
local.identifier.citationvolume532
local.identifier.doi10.1051/0004-6361/201116546
local.identifier.scopusID2-s2.0-79960237297
local.identifier.thomsonID000293283600019
local.identifier.uidSubmittedByf2965
local.type.statusPublished Version

Downloads

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
01_Marino_The_two_metallicity_groups_of_2011.pdf
Size:
1.24 MB
Format:
Adobe Portable Document Format
Download

Collections

ANU Research Publications

DSpace software copyright © 2002-2024 LYRASIS