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dc.contributor.authorOverbeek, Jamie C.
dc.contributor.authorFriel, Eileen D.
dc.contributor.authorJohnson, Christian I.
dc.contributor.authorPilachowski, Catherine A.
dc.contributor.authorMészáros, Szabolcs
dc.contributor.authorJacobson, Heather
dc.date.accessioned2015-02-17T17:22:24Z
dc.date.available2015-02-17T17:22:24Z
dc.date.issued2014-12
dc.date.submitted2014-07
dc.identifier.issn1538-3881
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1721.1/94564
dc.description.abstractWe have obtained high-resolution spectra of 32 giants in the open cluster NGC 7789 using the Wisconsin–Indiana–Yale–NOAO Hydra spectrograph. We explore differences in atmospheric parameters and elemental abundances caused by the use of the linelist developed for the Gaia-ESO Survey (GES) compared to one based on Arcturus used in our previous work. [Fe/H] values decrease when using the GES linelist instead of the Arcturus-based linelist; these differences are probably driven by systematically lower (~−0.1 dex) GES surface gravities. Using the GES linelist we determine abundances for 10 elements—Fe, Mg, Si, Ca, Ti, Na, Ni, Zr, Ba, and La. We find the clusterʼs average metallicity [Fe/H] = 0.03 ± 0.07 dex, in good agreement with literature values, and a lower [Mg/Fe] abundance than has been reported before for this cluster (0.11 ± 0.05 dex). We also find the neutron-capture element barium to be highly enhanced—[Ba/Fe] = +0.48 ± 0.08—and disparate from cluster measurements of neutron-capture elements La and Zr (−0.08 ± 0.05 and 0.08 ± 0.08, respectively). This is in accordance with recent discoveries of supersolar Ba enhancement in young clusters along with more modest enhancement of other neutron-capture elements formed in similar environments.en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administrationen_US
dc.description.sponsorshipNational Science Foundation (U.S.)en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-6256/149/1/15en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleNGC 7789: AN OPEN CLUSTER CASE STUDYen_US
dc.typeArticleen_US
dc.identifier.citationOverbeek, Jamie C., Eileen D. Friel, Heather R. Jacobson, Christian I. Johnson, Catherine A. Pilachowski, and Szabolcs Mészáros. “NGC 7789: AN OPEN CLUSTER CASE STUDY.” The Astronomical Journal 149, no. 1 (December 10, 2014): 15. © 2015 The American Astronomical Societyen_US
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorJacobson, Heatheren_US
dc.relation.journalAstronomical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsOverbeek, Jamie C.; Friel, Eileen D.; Jacobson, Heather R.; Johnson, Christian I.; Pilachowski, Catherine A.; Mészáros, Szabolcsen_US
dc.identifier.orcidhttps://orcid.org/0000-0001-7727-1640
mit.licensePUBLISHER_POLICYen_US


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