M13 multiple stellar populations seen with the eyes of Strömgren photometry

Abstract

We present a photometric study of M13 multiple stellar populations over a wide field of view, covering approximately 6.5 half-light radii, using archival Isaac Newton Telescope observations to build an accurate multi-band Strömgren catalogue. The use of the Strömgren index $c_y$ permits us to separate the multiple populations of M13 on the basis of their position on the red giant branch. The comparison with medium and high resolution spectroscopic analysis confirms the robustness of our selection criterion. To determine the radial distribution of stars in M13, we complemented our dataset with Hubble Space Telescope observations of the cluster core, to compensate for the effect of incompleteness affecting the most crowded regions. From the analysis of the radial distributions we do not find any significant evidence of spatial segregation. Some residuals may be present in the external regions where we observe only a small number of stars. This finding is compatible with the short dynamical timescale of M13 and represents, to date, one of the few examples of fully spatially mixed multiple populations in a massive globular cluster.

arXiv comment10 pages, 10 figures, 2 tables, Accepted for publication in MNRAS

References in corpus (47)

• Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters
• Na-O Anticorrelation and HB. VII. The chemical composition of first and second-generation stars in 15 globular clusters from GIRAFFE spectra
• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters Without Previous HST Photometry
• Properties of stellar generations in Globular Clusters and relations with global parameters
• 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
• Predictions for self-pollution in globular cluster stars
• Massive binaries as the source of abundance anomalies in globular clusters
• Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. V. Constraints on Formation Scenarios
• Super-Massive Stars as a Source of Abundance Anomalies of Proton-Capture Elements in Globular Clusters
• Early Disc Accretion as the Origin of Abundance Anomalies in Globular Clusters
• Multiple stellar populations in 47 Tucanae
• Abundances in a Large Sample of Stars in M3 and M13
• Photometric signatures of multiple stellar populations in Galactic globular clusters
• The Chemical Composition Contrast between M3 and M13 Revisited: New Abundances for 28 Giant Stars in M3
• Na-O Anticorrelation And HB I. The Na-O anticorrelation in NGC 2808
• Dynamical Evolution and Spatial Mixing of Multiple Population Globular Clusters
• Looking outside the Galaxy: the discovery of chemical anomalies in 3 old Large Magellanic Cloud clusters
• VLT/UVES Spectroscopy of Individual Stars in Three Globular Clusters in the Fornax Dwarf Spheroidal Galaxy
• Nitrogen abundances in giant stars of the globular cluster NGC 6752
• A General Abundance Problem for All Self-Enrichment Scenarios for the Origin of Multiple Populations in Globular Clusters
• Mining SDSS in search of Multiple Populations in Globular Clusters
• Stromgren Photometry of Globular Clusters: The Distance and Age of M13, Evidence For Two Populations of Horizontal-Branch Stars
• Five groups of red giants with distinct chemical composition in the globular cluster NGC 2808
• A model for the Globular Cluster extreme anomalies
• The Horizontal Branch in the UV Colour Magnitude Diagrams. II. The case of M3, M13 and M79
• Multiple populations in the old and massive Small Magellanic Cloud globular cluster NGC121
• Nitrogen abundances and multiple stellar populations in the globular clusters of the Fornax dSph
• Sodium content as a predictor of the advanced evolution of globular cluster stars
• Stroemgren photometry of Galactic Globular Clusters. I. New Calibrations of the metallicity index
• Oxygen and Sodium Abundances in M13 (NGC 6205) Giants: Linking Globular Cluster Formation Scenarios, Deep Mixing, and Post-RGB Evolution
• First evidence of fully spatially mixed first and second generations in globular clusters: the case of NGC 6362
• Differences in the rotational properties of multiple stellar populations in M 13: a faster rotation for the "extreme" chemical subpopulation
• A Stromgren view of the multiple populations in globular clusters
• Multiple stellar populations of globular clusters from homogeneous Ca-Cn photometry. II. M5 (NGC 5904) and a new filter system
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. VIII. Preliminary Public Catalog Release
• Observing multiple stellar populations with FORS2@VLT - Main sequence photometry in outer regions of NGC 6752, NGC 6397, and NGC 6121 (M 4)
• Multiple stellar populations in the globular cluster M3 (NGC 5272): a Strömgren perspective
• On the missing second generation AGB stars in NGC6752
• An extreme paucity of second population AGB stars in the normal globular cluster M4
• Two Distinct Red Giant Branches in the Globular Cluster NGC 288
• Lost and found: evidence of Second Generation stars along the Asymptotic Giant Branch of the globular cluster NGC 6752
• Multiple populations along the asymptotic giant branch of the globular cluster M 4
• First evidence of multiple populations along the AGB from Strömgren photometry
• Strömgren uvby photometry of the peculiar globular cluster NGC 2419

Cited by in corpus (15)

• What is a globular cluster? An observational perspective
• Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra
• The Peculiar Radial Distribution of Multiple Populations in the massive globular cluster M80
• A Wide-Field View on Multiple Stellar Populations in 28 Milky Way Globular Clusters
• The unexpected kinematics of multiple populations in NGC6362: do binaries play a role?
• Purveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters
• The peculiar kinematics of the multiple populations in the globular cluster Messier 80 (NGC 6093)
• Isochrone fitting of Galactic globular clusters -- III. NGC\,288, NGC\,362, and NGC\,6218 (M12)
• Isochrone fitting of Galactic globular clusters -- II. NGC6205 (M13)
• Blanco DECam Bulge Survey (BDBS) III: A new view of the double red clump in the Milky Way bulge through luminosity and color distribution
• Isochrone fitting of Galactic globular clusters -- IV. NGC6362 and NGC6723
• Isochrone fitting of Galactic globular clusters -- V. NGC6397 and NGC6809 (M55)
• Successful application of PSF-R techniques to the case of the globular cluster NGC6121 (M4)
• A Careful Reassessment of Globular Cluster Multiple Population Radial Distributions with Sloan Digital Sky Survey and Johnson-Cousins Broadband Photometry
• Re-examining the Radial Distributions of M13 Multiple Populations