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Centauri: The Population Puzzle Goes Deeper
Open accessAbstract
We present HST observations that show a bifurcation of colors in the middle main sequence of the globular cluster Omega Centauri. We see this in three different fields, observed with different cameras and filters. We also present high precision photometry of a central ACS field which shows a number of main-sequence turnoffs and subgiant branches. The double main sequence, the multiple turnoffs and subgiant branches, and other population sequences discovered in the past along the red giant branch of this cluster add up to a fascinating but frustrating puzzle. We suggest various explanations, none of them very conclusive.
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Cited by
Multiple populations in globular clusters: Lessons learned from the Milky Way globular clusters
Gratton, R. G., Carretta, E., & Bragaglia, A. (2012) · The Astronomy and Astrophysics Review · doi:10.1007/s00159-012-0050-3 · Cited by 787
Formation and dynamical evolution of multiple stellar generations in globular clusters
D'Ercole, A., Vesperini, E., D'Antona, F., McMillan, S. L. W., & Recchi, S. (2008) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2008.13915.x · Cited by 657
Piotto, G., Milone, A. P., Bedin, L. R., Anderson, J., King, I. R., Marino, A. F., Nardiello, D., Aparicio, A., Barbuy, B., Bellini, A., et al. (2015) · The Astronomical Journal · doi:10.1088/0004-6256/149/3/91 · Cited by 507
Self-citationEvidence for two early accretion events that built the Milky Way stellar halo
Myeong, G. C., Vasiliev, E., Iorio, G., Evans, N. W., & Belokurov, V (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz1770 · Cited by 505
THE ACS SURVEY OF GALACTIC GLOBULAR CLUSTERS. VII. RELATIVE AGES
Marín-Franch, A., Aparicio, A., Piotto, G., Rosenberg, A., Chaboyer, B., Sarajedini, A., Siegel, M., Anderson, J., Bedin, L. R., Dotter, A., et al. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/694/2/1498 · Cited by 494
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Metadata
- Authors
- Bedin, L. R., Piotto, G., Anderson, J., Cassisi, S., King, I. R., Momany, Y., & Carraro, G.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2004-03-23
- Volume
- 605
- Issue
- 2
- Pages
- L125-L128
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1992885010
- Cited by
- 556
- References
- 0
- FWCI
- 14.97
- Type
- journal article
- Language
- en
- Open access
- green
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- Bedin, L. R., Piotto, G., Anderson, J., Cassisi, S., King, I. R., Momany, Y., & Carraro, G. (2004). Centauri: The Population Puzzle Goes Deeper. The Astrophysical Journal. https://doi.org/10.1086/420847
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