Journal article
Homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code - II. The Southern clusters and overview
Monthly notices of the Royal Astronomical Society, Vol.492(2), pp.1641-1670
02/21/2020
DOI: 10.1093/mnras/stz3496
Abstract
We investigate the Fe, C, N, O, Mg, Al, Si, K, Ca, Ce, and Nd abundances of 2283 red giant stars in 31 globular clusters from high-resolution spectra observed in both the Northern and Southern hemisphere by the SDSS-IV APOGEE-2 survey. This unprecedented homogeneous data set, largest to date, allows us to discuss the intrinsic Fe spread, the shape, and statistics of Al-Mg and N-C anti-correlations as a function of cluster mass, luminosity, age, and metallicity for all 31 clusters. We find that the Fe spread does not depend on these parameters within our uncertainties including cluster metallicity, contradicting earlier observations. We do not confirm the metallicity variations previously observed in M22 and NGC 1851. Some clusters show a bimodal Al distribution, while others exhibit a continuous distribution as has been previously reported in the literature. We confirm more than two populations in omega Cen and NGC 6752, and find new ones in M79. We discuss the scatter of Al by implementing a correction to the standard chemical evolution of Al in the Milky Way. After correction, its dependence on cluster mass is increased suggesting that the extent of Al enrichment as a function of mass was suppressed before the correction. We observe a turnover in the Mg-Al anticorrelation at very low Mg in omega Cen, similar to the pattern previously reported in M15 and M92. omega Cen may also have a weak K-Mg anticorrelation, and if confirmed, it would be only the third cluster known to show such a pattern.
Details
- Title: Subtitle
- Homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code - II. The Southern clusters and overview
- Creators
- Szabolcs Meszaros - Eötvös Loránd UniversityThomas Masseron - Universidad de La LagunaD. A. Garcia-Hernandez - Universidad de La LagunaCarlos Allende Prieto - Universidad de La LagunaTimothy C. Beers - University of Notre DameDmitry BizyaevDrew Chojnowski - New Mexico State UniversityRoger E. Cohen - Space Telescope Science InstituteKatia Cunha - Valongo ObservatoryFlavia Dell'Agli - Universidad de La LagunaGarrett Ebelke - University of VirginiaJose G. Fernandez-Trincado - University of AtacamaPeter M. Frinchaboy - Texas Christian UniversityDoug Geisler - University of ConcepciónSten Hasselquist - University of UtahFrederick R. Hearty - Pennsylvania State UniversityJon Holtzman - New Mexico State UniversityJennifer Johnson - The Ohio State UniversityRichard R. Lane - Pontificia Universidad Católica de ChileIvan Lacerna - University of AtacamaPenelope Longa-Pena - Universidad de AntofagastaSteven R. Majewski - University of VirginiaSarah L. Martell - UNSW SydneyDante Minniti - Universidad Andrés BelloDavid Nataf - Johns Hopkins UniversityDavid L. Nidever - Montana State UniversityKaike Pan - ApacheRicardo P. Schiavon - Liverpool John Moores UniversityMatthew Shetrone - The University of Texas at AustinVerne V. Smith - Kitt Peak National ObservatoryJennifer S. Sobeck - Valongo ObservatoryGuy S. Stringfellow - University of Colorado BoulderLaszlo Szigeti - Eötvös Loránd UniversityBaitian Tang - National Sun Yat-sen UniversityJohn C. Wilson - University of VirginiaOlga Zamora - Universidad de La Laguna
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.492(2), pp.1641-1670
- DOI
- 10.1093/mnras/stz3496
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford Univ Press
- Number of pages
- 30
- Grant note
- University of Notre Dame New York University Universidad Nacional Autonoma de Mexico University of Utah Harvard-Smithsonian Center for Astrophysics; Smithsonian Institution Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo Lawrence Berkeley National Laboratory; United States Department of Energy (DOE) Direccin de Investigacin y Desarrollo de la Universidad de La Serena through the Programa de Incentivo a la Investigacin de Acadmicos (PIA-DIDULS) State Research Agency (AEI) of the Spanish Ministry of Science, Innovation and Universities (MCIU); Spanish Government Ohio State University
- Language
- English
- Date published
- 02/21/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984701727902771
Metrics
6 Record Views