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Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters

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arxiv 1201.6526 v1 pith:EFMZLFIF submitted 2012-01-31 astro-ph.SR astro-ph.GA

classification astro-ph.SRastro-ph.GA
keywords clustersglobularpopulationsseveralformationgalaxymultipleprogress
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Recent progress in studies of globular clusters has shown that they are not simple stellar populations, being rather made of multiple generations. Evidence stems both from photometry and spectroscopy. A new paradigm is then arising for the formation of massive star clusters, which includes several episodes of star formation. While this provides an explanation for several features of globular clusters, including the second parameter problem, it also opens new perspectives about the relation between globular clusters and the halo of our Galaxy, and by extension of all populations with a high specific frequency of globular clusters, such as, e.g., giant elliptical galaxies. We review progress in this area, focusing on the most recent studies. Several points remain to be properly understood, in particular those concerning the nature of the polluters producing the abundance pattern in the clusters and the typical timescale, the range of cluster masses where this phenomenon is active, and the relation between globular clusters and other satellites of our Galaxy.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The first IXPE view of the eclipsing ADC source 4U 1822-37

    astro-ph.HE 2026-05 unverdicted novelty 7.0 of 10

    IXPE measures 7.9% polarization in 4U 1822-37 with energy dependence and eclipse variation consistent with scattering in an extended corona at high inclination.

  2. The complex stellar system M 22: constraining the chemical enrichment from AGB stars using magnesium isotope ratios

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    First Mg isotope measurements at [Fe/H]≈-2 in a globular cluster show no difference tied to s-process enrichment, favoring ~2.75 M_sun AGB polluters and a 280–480 Myr age gap.

  3. The complex stellar system M 22: confirming abundance variations with high precision differential measurements

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    High-precision differential abundances confirm M 22 hosts a >0.24 dex iron spread and ~0.65 dex s-process spread, and reveal new internal abundance variations within each population.

  4. Globular Clusters in the Time of the JWST. I. Survey Design and First Results on Multiple Populations and Beyond

    astro-ph.GA 2026-06 unverdicted novelty 4.0 of 10

    JWST NIRCam survey of 11 globular clusters detects multiple populations in low-mass stars, showing discrete sequences in some clusters and continuous distributions or helium/oxygen variations in others, plus an M-dwar...

  5. The Formation of Globular Clusters

    astro-ph.GA 2025-01 unverdicted novelty 3.0 of 10

    Globular clusters are best understood as the surviving remnants of ordinary, high-pressure star formation in high-redshift galaxies.

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