Homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code – II. The Southern clusters and overview

Author:

Mészáros Szabolcs123,Masseron Thomas45,García-Hernández D A45,Allende Prieto Carlos45,Beers Timothy C6,Bizyaev Dmitry7,Chojnowski Drew8,Cohen Roger E9,Cunha Katia1011,Dell’Agli Flavia45,Ebelke Garrett12,Fernández-Trincado José G1314,Frinchaboy Peter15,Geisler Doug161718,Hasselquist Sten19,Hearty Fred20,Holtzman Jon21,Johnson Jennifer22,Lane Richard R23,Lacerna Ivan1324ORCID,Longa-Peña Penelopé25,Majewski Steven R12,Martell Sarah L26ORCID,Minniti Dante272829,Nataf David30,Nidever David L3132,Pan Kaike7,Schiavon Ricardo P33,Shetrone Matthew34,Smith Verne V32,Sobeck Jennifer S11,Stringfellow Guy S35ORCID,Szigeti László13,Tang Baitian36,Wilson John C12,Zamora Olga45

Affiliation:

1. ELTE Eötvös Loránd University, Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre H. st. 112, Hungary

2. Premium Postdoctoral Fellow of the Hungarian Academy of Sciences

3. MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. st. 112, Hungary

4. Instituto de Astrofísica de Canarias (IAC), La Laguna, E-38205 Tenerife, Spain

5. Universidad de La Laguna (ULL), Departamento de Astrofísica, La Laguna, E-38206 Tenerife, Spain

6. Department of Physics and JINA Center for the Evolution of the Elements, University of Notre Dame, Notre Dame, IN 46556, USA

7. Apache Point Observatory, PO Box 59, Sunspot, NM 88349, USA

8. Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, USA

9. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

10. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA

11. Observatório Nacional, 77 Rua General José Cristino, Rio de Janeiro, 20921-400, Brazil

12. Department of Astronomy, University of Virginia, Charlottesville, VA 22904-4325, USA

13. Instituto de Astronomía y Ciencias Planetarias, Universidad de Atacama, Copayapu 485, Copiapó, Chile

14. Institut Utinam, CNRS-UMR 6213, Université Bourgogne-Franche-Compté, OSU THETA Franche-Compté, Observatoire de Besançon, BP 1615, F-251010 Besançon Cedex, France

15. Department of Physics & Astronomy, Texas Christian University, Fort Worth, TX 76129, USA

16. Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile

17. Instituto de Investigacin Multidisciplinario en Ciencia y Tecnología, Universidad de La Serena. Avenida Ral Bitrn S/N, La Serena, Chile

18. Departamento de Astronomía, Facultad de Ciencias, Universidad de La Serena. Av. Juan Cisternas 1200, La Serena, Chile

19. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA

20. Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA

21. New Mexico State University, Las Cruces, NM 88003, USA

22. Department of Astronomy, The Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA

23. Instituto de Astroísica, Pontificia Universidad Catalica de Chile, Av. Vicuna Mackenna 4860, Macul, 782-0436 Santiago, Chile

24. Instituto Milenio de Astrofísica, Av. Vicuña Mackenna 4860, Macul, 782-0436 Santiago, Chile

25. Centro de Astronomia, Universidad de Antofagasta, Avenida Angamos 601, Antofagasta 1270300, Chile

26. School of Physics, University of New South Wales, NSW 2052, Australia

27. Departamento de Ciencias Fisicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Fernandez Concha 700, Las Condes, Santiago, Chile

28. Millennium Institute of Astrophysics, Av. Vicuna Mackenna 4860, 782-0436 Santiago, Chile

29. Vatican Observatory, I-V00120 Vatican City State, Italy

30. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA

31. Department of Physics, Montana State University, PO Box 173840, Bozeman, MT 59717-3840, USA

32. National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719, USA

33. Astrophysics Research Institute, IC2, Liverpool Science Park, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK

34. University of Texas at Austin, McDonald Observatory, Fort Davis, TX 79734, USA

35. Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, 389 UCB, Boulder, CO 80309-0389, USA

36. School of Physics and Astronomy, Sun Yat-sen University, Zhuhai, China

Abstract

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 ω 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 ω Cen, similar to the pattern previously reported in M15 and M92. ω 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.

Funder

Premium Postdoctoral Research Program

János Bolyai Research Scholarship

State Research Agency

Ministry of Science, Innovation and Universities

European Regional Development Fund

Fondo Nacional de Desarrollo Científico y Tecnológico

Chilean Centro de Excelencia en Astrofísicay Tecnologías Afines

Australian Research Council

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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