Show simple item record

dc.contributor.authorPiatti, Andrés E.
dc.contributor.authorBailin, Jeremy
dc.date.accessioned2019-06-06T23:53:19Z
dc.date.available2019-06-06T23:53:19Z
dc.date.issued2019-02
dc.identifier.citationAndrés E. Piatti and Jeremy Bailin 2019 AJ 157 49en_US
dc.identifier.issn1538-3881
dc.identifier.doi10.3847/1538-3881/aaf572
dc.identifier.urihttp://hdl.handle.net/10150/632536
dc.description.abstractWe report on the spread of [Fe/H] values in the massive Large Magellanic Cloud cluster NGC 1978, recently confirmed to harbor multiple populations of nearly the same age. We used accurate Stromgren photometry of carefully selected cluster red giant branch stars along with a high-dispersion spectroscopy-based calibration of the metallicity-sensitive index m(1). Once we accounted for the photometry quality, assessed from extensive artificial star tests to trace the photometric uncertainties as a function of the position of the cluster's center as well as the stellar brightness, and those from the metallicity calibration, we found that NGC 1978 exhibits a small metallicity spread of 0.035 dex (+/- 0.019-0.023), depending on whether stars with individual sigma[Fe/H] <= 0.15 dex or those located in the cluster's outer areas are considered. Such a spread in [Fe/H] is consistent with a cluster formation model with self-enrichment, if mass loss higher than 90% due to stellar evolutionary and galactic tidal effects is assumed. Nevertheless, scenarios in which the apparent [Fe/H] variation reflects CN abundance anomalies or less extreme mass-loss models with environmentally dependent self-enrichment should not be ruled out.en_US
dc.description.sponsorshipNASA through Space Telescope Science Institute [HST-AR-13908.001-A]; NASA [NAS 5-26555]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/1538-3881/157/i=2/a=49?key=crossref.cb23bb754825d33cc93327665e429ad9en_US
dc.rights© 2019. The American Astronomical Society. All rights reserved.en_US
dc.subjectgalaxies: individual (LMC)en_US
dc.subjectgalaxies: star clusters: generalen_US
dc.titleSearch for a Metallicity Spread in the Multiple Population Large Magellanic Cloud Cluster NGC 1978en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTRONOMICAL JOURNALen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astronomical Journal
dc.source.volume157
dc.source.issue2
dc.source.beginpage49
refterms.dateFOA2019-06-06T23:53:19Z


Files in this item

Thumbnail
Name:
Piatti_2019_AJ_157_49.pdf
Size:
579.8Kb
Format:
PDF
Description:
Final Published version

This item appears in the following Collection(s)

Show simple item record