Spectroscopic and photometric evidence of two stellar populations in the Galactic globular cluster NGC 6121 (M 4)

2008/08/08 by A. F. Marino, S. Villanova, G. Piotto +4 · 384 citations
Medicine · Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Context (archaeology) #Globular cluster #Horizontal branch #Medicine #Physics #Population #Red-giant branch #Star cluster #Star formation #Stars #Stellar population #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:200810389

published in Astronomy and Astrophysics 490(2), 625-640 (EDP Sciences) · 21 pages, 16 figures, accepted for publication in Astronomy and Astrophysics

openalex publication_date 2008/08/08 · arxiv created 2008/08/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Aims. We present abundance analysis based on high resolution spectra of 105 isolated red giant branch (RGB) stars in the Galactic Globular Cluster NGC 6121 (M 4). Our aim is to study its star population in the context of the multi-population phenomenon recently discovered to affect some Globular Clusters.

Citations

• A Triple Main Sequence in the Globular Cluster NGC 2808
• The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters without PreviousHubble Space TelescopePhotometry
• The metallicity of M4: Accurate spectroscopic fundamental parameters for four giants
• Deep FORS1 Observations of the Double Main Sequence of ω Centauri
• Metallicities on the Double Main Sequence of ω Centauri Imply Large Helium Enhancement
• The Two Micron All Sky Survey (2MASS)
• Abundances of C, N, O in slightly evolved stars in the globular clusters NGC 6397, NGC 6752 and 47 Tuc
• Why hot horizontal branch stars can appear redder than red giants
• Abundance Variations within Globular Clusters
• Ground-based CCD astrometry with wide-field imagers
• Na-O anticorrelation and HB

Cited by

• Globular cluster formation from inertial inflows: accreting extremely massive stars as the origin of abundance anomalies
• Chemical abundance analysis of red giant branch stars in the globular cluster E3
• CALCIUM AND LIGHT-ELEMENTS ABUNDANCE VARIATIONS FROM HIGH-RESOLUTION SPECTROSCOPY IN GLOBULAR CLUSTERS