Discovery of Carbon/Oxygen depleted Blue Straggler Stars in 47 Tucanae: the chemical signature of a mass-transfer formation process

Abstract

We use high-resolution spectra obtained with the ESO Very Large Telescope to measure surface abundance patterns of 43 Blue Stragglers stars (BSS) in 47 Tuc. We discovered that a sub-population of BSS shows a significant depletion of Carbon and Oxygen with respect to the dominant population. This evidence would suggest the presence of CNO burning products on the BSS surface coming from a deeply peeled parent star, as expected in the case of mass-transfer process. This is the first detection of a chemical signature clearly pointing to a specific BSS formation process in a globular cluster.

arXiv commentPublished on 2006, August 10, in ApJ 647, L53

References in corpus (17)

• The giant, horizontal and asymptotic branches of galactic globular clusters. I. The catalog, photometric observables and features
• A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources
• Metal Abundances of Red Clump Stars in Open Clusters: I. NGC 6819
• Abundances of C, N, O in slightly evolved stars in the globular clusters NGC 6397, NGC 6752 and 47 Tuc
• The Frequency of Binary Stars in the Core of 47 Tucanae
• Blue straggler production in globular clusters
• Blue Straggler Stars: a direct comparison of Star counts and population ratios in six Galactic Globular Clusters
• Abundance Analysis of Turn-Off and Early Subgiant Stars in the Globular Cluster 47 Tuc (NGC 104)
• The contribution of primordial binaries to the blue straggler population in 47 Tucanae
• First stars IV.CS 29497-030: Evidence for operation of the s-process at very low metallicity
• Discovery of another peculiar radial distribution of Blue Stragglers in Globular Clusters: The case of 47 Tuc
• ON BLUE STRAGGLER FORMATION BY DIRECT COLLISIONS OF MAIN-SEQUENCE STARS
• A Comprehensive Catalogue of Variable Stars in the field of 47 Tucanae
• Spectroscopy of Blue Stragglers and Turnoff Stars in M67 (NGC 2682)
• Calibrated stellar models for metal-poor population
• A Spectroscopic Analysis of Blue Stragglers, Horizontal Branch and Turn-Off Stars in Four Globular Clusters
• The Optical Gravitational Lensing Experiment. Variable Stars in Globular Clusters - IV. Fields 104A-E in 47 Tuc

Cited by in corpus (83)

• Fitting the integrated Spectral Energy Distributions of Galaxies
• What is a globular cluster? An observational perspective
• Two distinct sequences of blue straggler stars in the globular cluster M30
• A Binary Origin for Blue Stragglers in Globular Clusters
• MOCCA code for star cluster simulations - I. Blue Stragglers, first results
• The First Detection of Blue Straggler Stars in the Milky Way Bulge
• The radial distribution of blue straggler stars and the nature of their progenitors
• The ISLAndS project II: The Lifetime Star Formation Histories of Six Andromeda dSphs
• Double Blue Straggler sequences in GCs: the case of NGC 362
• Lithium abundance in the globular cluster M4: from the Turn-Off to the RGB Bump
• The blue plume population in dwarf spheroidal galaxies: genuine blue stragglers or young stellar population?
• Implications for the Formation of Blue Straggler Stars from HST Ultraviolet Observations of NGC 188
• Investigating mass segregation process in globular clusters with Blue Straggler Stars: the impact of dark remnants
• A Panchromatic Study of the Globular Cluster NGC 1904. I: The Blue Straggler Population
• Blue Straggler Stars in the Unusual Globular Cluster NGC 6388
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters - XV. The dynamical clock: reading cluster dynamical evolution from the segregation level of blue straggler stars
• Runaway and hypervelocity stars in the Galactic halo: Binary rejuvenation and triple disruption
• The Blue Straggler Population of the Globular Cluster M5
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• A Correlation between Blue Straggler and Binary Fractions in the core of Galactic Globular Clusters
• Constraining cosmic scatter in the Galactic halo through a differential analysis of metal-poor stars
• Chemical and kinematical properties of BSSs and HB stars in NGC 6397
• The surprising external upturn of the Blue Straggler radial distribution in M55
• Discovery of Extended Main Sequence Turn-offs in Four Young Massive Clusters in the Magellanic Clouds
• The "UV-route" to search for Blue Straggler Stars in Globular Clusters: first results from the HST UV Legacy Survey
• Multiwavelength photometry in the Globular Cluster M2
• Blue Straggler Populations of Seven Open Clusters with Gaia DR2
• Fast rotating Blue Stragglers in the globular cluster M4
• A kinematic view of NGC 1261: structural parameters, internal dispersion, absolute proper motion and Blue Straggler Stars
• The "dynamical clock": dating the internal dynamical evolution of star clusters with Blue Straggler Stars
• The Clusters AgeS Experiment (CASE). II. The Eclipsing Blue Straggler OGLEGC-228 in the Globular Cluster 47 Tuc
• FLAMES and XSHOOTER spectroscopy along the two BSS sequences of M30
• Fast rotating Blue Stragglers prefer loose clusters
• The binary mass transfer origin of the red blue straggler sequence in M30
• The helium abundance in the metal-poor globular clusters M30 and NGC6397
• Star density profiles of six old star clusters in the Large Magellanic Cloud
• The Unimodal Distribution Of Blue Straggler Stars in M75 (NGC 6864)
• New clues on the nature of the companion to PSR~J1740-5340 in NGC6397 from XSHOOTER spectroscopy
• A population of binaries in the Asymptotic Giant Branch of 47 Tucanae?
• Discovery of a double Blue Straggler sequence in M15: new insight into the core-collapse process
• Oscillating Blue Stragglers, gamma Doradus stars and eclipsing binaries in the open cluster NGC2506
• Dynamical friction in multi-component evolving globular clusters
• Deep multi-telescope photometry of NGC 5466. I. Blue Stragglers and binary systems
• Metal-Rich SX Phe stars in the Kepler Field
• Spectral Energy Distribution of Blue Stragglers in the core of 47 Tucanae
• A binary merger origin for inflated hot Jupiter planets
• Weighing stars: the identification of an Evolved Blue Straggler Star in the globular cluster 47 Tucanae
• The double Blue Straggler sequence in NGC2173: a field contamination artefact
• UOCS-VIII. UV Study of the open cluster NGC 2506 using ASTROSAT
• Blue straggler masses from pulsation properties. II. Topology of the Instability Strip
• Spinning like a Blue Straggler: the population of fast rotating Blue Straggler stars in Omega Centauri
• Probing the role of dynamical friction in shaping the BSS radial distribution. I - Semi-analytical models and preliminary N-body simulations
• A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14
• Barium Surface Abundances of Blue Stragglers in the Open Cluster NGC 6819
• UV observations of the globular cluster M10 from HST and GALEX. The BSS population
• Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
• The Blue Straggler population in the globular cluster M53 (NGC5024): a combined HST, LBT, CFHT study
• Bright Variable Stars in NGC 6819 - An Open Cluster in the Kepler Field
• Contribution of primordial binary evolution to the two blue-straggler sequences in globular cluster M30
• Discovery of a Gas giant Planet in Microlensing Event OGLE-2014-BLG-1760
• Emitting Electron Spectra and Acceleration Processes in the Jet of PKS 0447-439
• Model computations of blue stragglers and W UMa-type stars in globular clusters
• MOCCA code for star cluster simulations - V. Initial globular cluster conditions influence on blue stragglers
• Another brick in understanding chemical and kinematical properties of BSSs: NGC 6752
• Blue Stragglers and Friends: Initial Evolutionary Pathways in Close Low-Mass Binaries: Literature Review
• Testing three derivative methods of stellar population synthesis models
• Blue Straggler Star Populations in Globular Clusters: I. Dynamical Properties of Blue Straggler Stars in NGC 3201, NGC 6218 and $\omega$ Centauri
• Discovery of double BSS sequences in the old Galactic open cluster Berkeley 17
• Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123
• M67 Blue Stragglers with High-resolution Infrared Spectroscopy
• Blue Straggler Stars in Globular Clusters: a powerful tool to probe the internal dynamical evolution of stellar systems
• Effects of Rotationally-Induced Mixing in Compact Binary Systems with Low-Mass Secondaries and in Single Solar-Type Stars
• Searching for new observational signatures of the dynamical evolution of star clusters
• Blue Straggler Bimodality: a Brownian Motion Model
• Rotational velocities of Blue Straggler Stars in the Globular Cluster M55
• Blue Stragglers in Globular Clusters: Observations, Statistics and Physics
• Structure and evolution of a tidally heated star
• Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution
• Detection of a white dwarf orbiting a Carbon-Oxygen depleted blue straggler in 47 Tucanae
• The Solar Neighborhood LII: M Dwarf Twin Binaries -- Presumed Identical Twins Appear Fraternal in Variability, Rotation, H$\alpha$, and X-rays
• Fast Rotating Blue Straggler Stars in the globular cluster NGC 1851
• Exotic populations in Globular Clusters: Blue Stragglers as tracers of the internal dynamical evolution of stellar systems
• Beryllium: The smoking gun of a rejuvenated star