The fraction of binary systems in the core of thirteen low-density Galactic globular clusters

Abstract

We used deep observations collected with ACS@HST to derive the fraction of binary systems in a sample of thirteen low-density Galactic globular clusters. By analysing the color distribution of Main Sequence stars we derived the minimum fraction of binary systems required to reproduce the observed color-magnitude diagram morphologies. We found that all the analysed globular clusters contain a minimum binary fraction larger than 6% within the core radius. The estimated global fractions of binary systems range from 10% to 50% depending on the cluster. A dependence of the relative fraction of binary systems on the cluster age has been detected, suggesting that the binary disruption process within the cluster core is active and can significantly reduce the binary content in time.

arXiv comment12 pages, 10 figures, accepted for publication by MNRAS

References in corpus (16)

• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• The Photometric Performance and Calibration of the HST Advanced Camera For Surveys
• Resolved Massive Star Clusters in the Milky Way and its Satellites: Brightness Profiles and a Catalogue of Fundamental Parameters
• Destruction of the Galactic Globular Cluster System
• The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters Without Previous HST Photometry
• The giant, horizontal and asymptotic branches of galactic globular clusters. I. The catalog, photometric observables and features
• Homogeneous age dating of 55 Galactic globular clusters. Clues to the Galaxy formation mechanisms
• The Evolution of Binary Fractions in Globular Clusters
• The Frequency of Binary Stars in the Core of 47 Tucanae
• Age Gradient and the Second Parameter Problem in the Galactic Halo
• What a Local Sample of Spectroscopic Binaries can tell us about the Field-Binary Population
• The Blue Straggler and Main-sequence Binary Population of the Low-Mass Globular Cluster Palomar 13
• Spectroscopic Binaries in Globular Clusters. II. A Search for Long-Period Binaries in M22
• Proper motion measurements as indicators of binarity in open clusters
• The stellar IMF of Galactic clusters and its evolution
• A Spectroscopic Survey for Binary Stars in the Globular Cluster NGC5053

Cited by in corpus (118)

• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• Young massive star clusters
• The ACS Survey of Galactic Globular Clusters. XII. Photometric Binaries along the Main-Sequence
• Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data
• A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: The Darkest Galaxy
• What is a globular cluster? An observational perspective
• The stellar and sub-stellar IMF of simple and composite populations
• The nucleus of the Sagittarius dSph galaxy and M54: a window on the process of galaxy nucleation
• Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations
• A stellar census in globular clusters with MUSE: Binaries in NGC 3201
• A Binary Origin for Blue Stragglers in Globular Clusters
• The Most Dark Matter Dominated Galaxies: Predicted Gamma-ray Signals from the Faintest Milky Way Dwarfs
• Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded Field Photometry and Cluster Fiducial Sequences in ugriz
• The SUMO project I. A survey of multiple populations in globular clusters
• The Cosmic Evolution of Binary Black Holes in Young, Globular and Nuclear Star Clusters: Rates, Masses, Spins and Mixing Fractions
• A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey
• Multiple stellar populations in the Galactic globular cluster NGC 6752
• The globular cluster NGC 2419: a crucible for theories of gravity
• Na-O anticorrelation and HB. IX. Kinematics of the program clusters. A link between systemic rotation and HB morphology?
• Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones
• An analytical description of the evolution of binary orbital-parameter distributions in N-body computations of star clusters
• Outer density profiles of 19 Galactic globular clusters from deep and wide-field imaging
• Luminosity and mass functions of the three main sequences of the globular cluster NGC 2808
• Massive binaries in the vicinity of Sgr A*
• Low-resolution spectroscopy of main sequence stars belonging to 12 Galactic globular clusters. I. CH and CN band strength variations
• The fraction of binary systems in the core of five Galactic open clusters
• On the temporal evolution of the stellar mass function in Galactic clusters
• Evolution of the Binary Fraction in Dense Stellar Systems
• The Puzzling White Dwarf Cooling Sequence in NGC6791: A Simple Solution
• The binary fractions in the massive young Large Magellanic Cloud star clusters NGC 1805 and NGC 1818
• Search for associations containing young stars (SACY). V. Is multiplicity universal? Tight multiple systems
• A Correlation between Blue Straggler and Binary Fractions in the core of Galactic Globular Clusters
• The Na-O anticorrelation in horizontal branch stars. I. NGC 2808
• Black Hole-Neutron Star Mergers in Globular Clusters
• The binary fraction in the globular cluster NGC 6397
• The Gaia-ESO Survey: Kinematics of seven Galactic globular clusters
• On the initial binary population for star cluster simulations
• The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis
• The effect of binaries on the dynamical mass determination of star clusters
• Binary radial velocity measurements with space-based gravitational-wave detectors
• The state of globular clusters at birth II: primordial binaries
• The VMC survey -- XLIII. The spatially resolved star formation history across the Large Magellanic Cloud
• The incidence of binaries in Globular Cluster stellar populations
• Black hole and neutron star mergers in Galactic Nuclei: the role of triples
• A comparison between the stellar and dynamical masses of six globular clusters
• Photometric binaries, mass functions, and structural parameters of 78 Galactic open clusters
• Fake star formation bursts: blue horizontal branch stars masquerade as young stars in optical integrated light spectroscopy
• The Gradients in the 47 Tuc Red Giant Branch Bump and Horizontal Branch are Consistent With a Centrally-Concentrated, Helium-Enriched Second Stellar Generation
• The surprising external upturn of the Blue Straggler radial distribution in M55
• An Analytic Model for Blue Straggler Formation in Globular Clusters
• The evolution of the binary population in globular clusters: a full analytical computation
• No evidence of mass segregation in the low mass Galactic globular cluster NGC 6101
• A search for spectroscopic binaries in the galactic globular cluster M4. Based on 5973 individual spectra collected at VLT
• On the origins of enigmatic stellar populations in Local Group galactic nuclei
• The non-segregated population of blue straggler stars in the remote globular cluster Palomar 14
• Binary populations in Milky Way satellite galaxies: constraints from multi-epoch data in the Carina, Fornax, Sculptor and Sextans dwarf spheroidal galaxies
• Biases on initial mass function determinations. II. Real multiple systems and chance superpositions
• The binary fraction in the globular cluster M10 (NGC 6254): comparing core and outer regions
• Constraining the dark cusp in the Galactic Center by long-period binaries
• A {\it Chandra} Survey of Milky Way Globular Clusters I: Emissivity and Abundance of Weak X-ray Sources
• The Binary Populations of Eight Globular Clusters in the Outer Halo of the Milky Way
• Multiplicity and period distribution of Population II field stars in solar vicinity
• The Na-O anticorrelation in horizontal branch stars. V. NGC 6723
• A Central Excess of Stripped-Envelope Supernovae within Disturbed Galaxies
• The state of globular clusters at birth: emergence from the gas-embedded phase
• The dynamical state of the Globular Cluster M10 (NGC 6254)
• Atomic structure calculations of super heavy noble element oganesson (Z=118)
• The impact of primordial binary on the dynamical evolution of intermediate massive star clusters
• Gravitational conundrum? Dynamical mass segregation versus disruption of binary stars in dense stellar systems
• Dissecting the Gaia HR diagram within 200 pc
• Effects of tidally enhanced stellar wind on the horizontal branch morphology of globular clusters
• Deep multi-telescope photometry of NGC 5466. I. Blue Stragglers and binary systems
• The Luminosity Function and stellar Mass to Light ratio of the massive globular cluster NGC2419
• Revisiting the universality of (multiple) star formation in present-day star formation regions
• Searching in the dark: the dark mass content of the Milky Way globular clusters NGC288 and NGC6218
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXI. Binaries among multiple stellar populations
• X-ray emissivity of old stellar populations: a local group census
• A New Approach to Convective Core Overshooting: Probabilistic Constraints from Color-Magnitude Diagrams of LMC Clusters
• Encounters involving planetary systems in birth environments: the significant role of binaries
• The family pictures of our neighbours: investigating the mass function and dynamical parameters of nearby open clusters
• New binaries from the SHINE survey
• The effect of unresolved binaries on globular cluster proper-motion dispersion profiles
• The X-ray Emissivity of Low-Density Stellar Populations
• Binary interactions as a possible scenario for the formation of multiple stellar populations in globular clusters
• Theoretical calculation of atomic properties of superheavy elements Z=110-112 and their ions
• Deep multi-telescope photometry of NGC 5466. II. The radial behaviour of the mass function slope
• The luminosity function of quasars by the Principle of Maximum Entropy
• Theoretical study of electron structure of superheavy elements with an open $6d$-shell, Sg, Bh, Hs and Mt
• Intermediate-Mass Black Holes in binary-rich star clusters
• Photometric Binaries in 14 Magellanic Cloud Star Clusters
• F Turnoff Distribution in the Galactic Halo Using Globular Clusters as Proxies
• Binary Frequencies in a Sample of Globular Clusters. I. Methodology and Initial Results
• A Chandra Survey of Milky Way Globular Clusters II: Testing the Hills-Heggie Law
• Mapping the stellar age of the Milky Way bulge with the VVV. II. Deep JKs catalogs release based on PSF photometry
• Impact of a companion and of chromospheric emission on the shape of chromosome maps for globular clusters
• Synthetic horizontal branch morphology for different metallicities and ages under tidally enhanced stellar wind
• Compact objects in globular clusters
• Stellar Populations in Globular Cluster Cores: Evidence for a Peculiar Trend Among Red Giant Branch Stars
• A proper motion study of the globular cluster M55
• Outliers: multicolour photometry guiding the search for evolved binary systems in the globular cluster 47 Tucanae
• A possible solution to the Milky Way's binary-deficient retrograde stellar population. Evidence that $\omega$ Centauri has formed in an extreme starburst
• Field blue straggler stars: Discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSat
• IN-SYNC. VII. Evidence for a decreasing spectroscopic binary fraction from 1 to 100 Myr within the IN-SYNC sample
• On the maximum helium content of multiple populations in the globular cluster NGC6752
• Time-Series BVI Photometry for the Globular Cluster NGC 6981 (M72)
• Effect of Binary Fraction on Horizontal Branch Morphology under Tidally Enhanced Stellar Wind
• Low-mass and sub-stellar eclipsing binaries in stellar clusters
• Blue Stragglers in Globular Clusters: Observations, Statistics and Physics
• Relation between spectral indices and binary fractions in GCs
• The impact of binary stars on the colors of high-redshift galaxies
• The Small Magellanic Cloud through the lens of the James Webb Space Telescope : binaries and mass function within the galaxy outskirts
• A deep HST view of the open cluster NGC2158: binaries, mass functions, and M-dwarf discontinuity
• Rubin Data Preview 1: Extending the View of Unresolved Binary Stars in 47 Tucanae
• The effects of binary interactions on parameter determinations for early-type galaxies
• New Way to Date Globular Clusters: Brown Dwarf Cooling Sequences
• PSF-based Analysis for Detecting Unresolved Wide Binaries
• Using Binaries in Globular Clusters to Catch Sight of Intermediate-Mass Black Holes
• Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury