Searching for GC-like abundance patterns in young massive clusters II. - Results from the Antennae galaxies
arXiv:1703.04591 · doi:10.1093/mnras/stx628
Abstract
The presence of multiple populations (MPs) with distinctive light element abundances is a widespread phenomenon in clusters older than 6 Gyr. Clusters with masses, luminosities, and sizes comparable to those of ancient globulars are still forming today. Nonetheless, the presence of light element variations has been poorly investigated in such young systems, even if the knowledge of the age at which this phenomenon develops is crucial for theoretical models on MPs. We use J-band integrated spectra of three young (7-40 Myr) clusters in NGC 4038 to look for Al variations indicative of MPs. Assuming that the large majority (>70%) of stars are characterised by high Al content - as observed in Galactic clusters with comparable mass; we find that none of the studied clusters show significant Al variations. Small Al spreads have been measured in all the six young clusters observed in the near-infrared. While it is unlikely that young clusters only show low Al whereas old ones display different levels of Al variations; this suggests the possibility that MPs are not present at such young ages at least among the high-mass stellar component. Alternatively, the fraction of stars with field-like chemistry could be extremely large, mimicking low Al abundances in the integrated spectrum. Finally, since the near-infrared stellar continuum of young clusters is almost entirely due to luminous red supergiants, we can also speculate that MPs only manifest themselves in low mass stars due to some evolutionary mechanism.
7 pages, 5 figures. To be published in MNRAS
References in corpus (34)
- A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
- Formation and Dynamical Evolution of Multiple Stellar Generations in Globular Clusters
- The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
- The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
- Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
- Globular clusters as the relics of regular star formation in 'normal' high-redshift galaxies
- Chemical tagging with APOGEE: Discovery of a large population of N-rich stars in the inner Galaxy
- A unique model for the variety of multiple populations formation(s) in globular clusters: a temporal sequence
- Looking outside the Galaxy: the discovery of chemical anomalies in 3 old Large Magellanic Cloud clusters
- The chemical composition of red giant stars in four intermediate-age clusters of the Large Magellanic Cloud
- A General Abundance Problem for All Self-Enrichment Scenarios for the Origin of Multiple Populations in Globular Clusters
- Chemical composition and constraints on mass loss for globular clusters in dwarf galaxies: WLM and IKN
- Globular Cluster Mass Loss in the Context of Multiple Populations
- APOGEE Chemical Abundances of Globular Cluster Giants in the Inner Galaxy
- The Search for Multiple Populations in Magellanic Cloud Clusters II: The Detection of Multiple Populations in Three Intermediate-Age SMC Clusters
- Multiple populations in the old and massive Small Magellanic Cloud globular cluster NGC121
- Na-O Anticorrelation and HB. VI. The chemical composition of the peculiar bulge globular cluster NGC 6388
- No Evidence for Significant Age Spreads in Young Massive LMC Clusters
- Constraining globular cluster formation through studies of young massive clusters - II. A Single Stellar Population Young Massive Cluster in NGC 34
- First evidence of fully spatially mixed first and second generations in globular clusters: the case of NGC 6362
- No evidence of chemical anomalies in the bimodal turnoff cluster NGC 1806 in the LMC
- Na-O Anticorrelation And HB. III. The abundances of NGC 6441 from FLAMES-UVES spectra
- Constraining globular cluster formation through studies of young massive clusters - V. ALMA observations of clusters in the Antennae
- Constraining Globular Cluster Formation Through Studies of Young Massive Clusters - IV. Testing the Fast Rotating Massive Star Scenario
- The Search for Multiple Populations in Magellanic Cloud Clusters I: Two Stellar Populations in the Small Magellanic Cloud Globular Cluster NGC 121
- Red Supergiants as Cosmic Abundance Probes: The Sculptor Galaxy NGC 300
- Constraining globular cluster formation through studies of young massive clusters - III. A lack of gas and dust in massive stellar clusters in the LMC and SMC
- Evidence for multiple populations in the intermediate age cluster Lindsay 1 in the SMC
- Three discrete groups with homogeneous chemistry along the red giant branch in the globular cluster NGC 2808
- Red Supergiants as cosmic abundance probes: the first direct metallicity determination of NGC 4038 in the Antennae
- A New Method for Measuring Metallicities of Young Super Star Clusters
- Multiple stellar populations in the globular cluster M3 (NGC 5272): a Strömgren perspective
- Searching for GC-like abundance patterns in young massive clusters
- NGC 6139: a normal massive globular cluster or a first-generation dominated cluster? Clues from the light elements
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- Star clusters forming in a low metallicity starburst -- rapid self-enrichment by (very) massive stars
- On the origin of UV-dim stars: a population of rapidly rotating shell stars?
- Multiple Populations in Integrated Light Spectroscopy of Intermediate Age Clusters
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- Multiple populations in low mass globular clusters: Palomar 13
- Searching for Multiple Populations in the Integrated Light of the Young and Extremely Massive Clusters in the Merger Remnant NGC~7252
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- Chemical composition of the young massive cluster NGC 1569-B