Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-18T14:12:22.888Z Has data issue: false hasContentIssue false
  • English
  • Français

The Composition of the Bulge Globular Cluster NGC 6273

Published online by Cambridge University Press:  31 March 2017

C. A. Pilachowski ,
C. I. Johnson ,
R. M. Rich ,
N. Caldwell ,
M. Mateo ,
J. I. Bailey III  and
J. D. Crane
C. A. Pilachowski
Affiliation:
Indiana University Bloomington, Department of Astronomy SW319, 727 E 3rd St., Bloomington, IN 47405USA email: [email protected]
C. I. Johnson
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St. MS-15, Cambridge, MA 02138USA email: [email protected]
R. M. Rich
Affiliation:
University of California at Los Angeles
N. Caldwell
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St. MS-15, Cambridge, MA 02138USA email: [email protected]
M. Mateo
Affiliation:
University of Michigan at Ann Arbor
J. I. Bailey III
Affiliation:
University of Michigan at Ann Arbor
J. D. Crane
Affiliation:
The Observatories of the Carnegie Institution of Washington
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Observations of red giants in the Bulge globular cluster NGC 6273 with the Michigan/Magellan Fiber System (M2FS) mounted on the Nasmuth-East port of the Magellan-Clay 6.5-m telescope at the Las Campanas Observatory reveal a spread in metallicity. Members have been confirmed with radial velocity. NGC 6273 has at least two populations separated by 0.2-0.3 dex in [Fe/H]. The sodium and aluminum abundances are correlated while the magnesium and aluminum abundances are anti-correlated. The cluster also shows a rise in the abundance of the s-process element lanthanum with [Fe/H] similar to other massive clusters. The cluster contains a possible third population depleted in most elements by 0.3 dex.

Keywords

globular clusters: individual (NGC 6273)stars: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 341 - 342
Copyright
Copyright © International Astronomical Union 2017 

References

Dotter, A., Chaboyer, B., Jevremović, D. et al. 2008, ApJS, 178, 89 Google Scholar
Harris, W. E. 1996 (2010 edition), AJ, 112, 1487 Google Scholar
Johnson, C. I. & Pilachowski, C. A. 2010, ApJ, 722, 1371 Google Scholar
Johnson, C. I., McDonald, I., Pilachowski, C. A., et al. 2015a, AJ, 149, 71 Google Scholar
Johnson, C. I., Rich, R. M., Pilachowski, C. A., et al. 2015b, AJ, 150: 63 Google Scholar
Marino, A. F., Sneden, C., Kraft, R. P., et al. 2011, A&A, 532, A8 Google Scholar
Marino, A. F., Milone, A. P., KaraKas, A. I, et al. 2015, MNRAS, 450, 815 Google Scholar
Yong, D., Roderer, I., Grundahl, F. et al. 2014, MNRAS, 441, 3396 Google Scholar