The end of the white dwarf cooling sequence in M 67

Abstract

In this paper, we present for the first time a proper-motion-selected white dwarf (WD) sample of the old Galactic open cluster M 67, down to the bottom of the WD cooling sequence (CS). The color-magnitude diagram is based on data collected with the LBC-Blue camera at the prime focus of LBT. As first epoch data, we used CFHT-archive images collected 10 years before LBC data. We measured proper motions of all the identified sources. Proper motions are then used to separate foreground and background objects from the cluster stars, including WDs. Finally, the field-object cleaned WD CS in the V vs. B-I color-magnitude diagram is compared with the models. We confirm that the age derived from the location of the bottom of the WD CS is consistent with the turn off age.

11 pages, 8 figures, 1 table. Accepted for publication in Astronomy and Astrophysics on January 20, 2010

References in corpus (23)

• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
• Chemical abundance analysis of the Open Clusters Cr110, NGC2099 (M37), NGC2420, NGC7789 and M67 (NGC2682)
• The white dwarf cooling sequence in NGC 6791
• Semi-empirical white dwarf initial-final mass relationships: a thorough analysis of systematic uncertainties due to stellar evolution models
• Ground-Based CCD Astrometry with Wide Field Imagers. I. [Observations just a few years apart allow decontamination of field objects from members in two Globular clusters.]
• The ages of very cool hydrogen-rich white dwarfs
• Ground-based CCD astrometry with wide field imagers. II. A star catalogue for M67: [email protected] MPG/ESO astrometry, FLAMES@VLT radial velocities
• The performance of the blue prime focus Large Binocular Camera at the Large Binocular Telescope
• The Masses of Population II White Dwarfs
• The Relative Ages of Galactic Globular Clusters
• Reaching the End of the White Dwarf Cooling Sequence in NGC 6791
• The End of the White Dwarf Cooling Sequence in M4: an efficient approach
• A High Relative-Precision Color-Magnitude Diagram of M67
• Astrometry and photometry with HST-WFC3. I. Geometric distortion corrections of F225W, F275W, F336W bands of the UVIS-channel
• The White Dwarf Cooling Age of M67
• The White Dwarf Deficit in Open Clusters: Dynamical Processes
• The Puzzling White Dwarf Cooling Sequence in NGC6791: A Simple Solution
• A new detailed examination of white dwarfs in NGC3532 and NGC2287
• Ground-based CCD astrometry with wide field imagers. III. [email protected] proper-motion catalog of the globular cluster omega Centauri
• An empirical test of the theoretical population corrections to the Red Clump absolute magnitude
• Very low mass white dwarfs with a C-O core
• Absolute proper motion of the Galactic open cluster M67

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• The updated BaSTI stellar evolution models and isochrones. III. White Dwarfs
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• The white dwarf population of NGC 6397
• Hubble Space Telescope observations of the Kepler-field cluster NGC 6819. I. The bottom of the white dwarf cooling sequence
• The white dwarf cooling sequence of 47 Tucanae
• Ground-based CCD astrometry with wide field imagers. IV. An improved Geometric Distortion Correction for the Blue prime-focus Camera at the LBT
• Observing the products of stellar evolution in the old open cluster M67 with APOGEE
• The white dwarf population within 40 pc of the Sun
• A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14
• Ensemble Properties of the White Dwarf Population of the Old, Solar Metallicity Open Star Cluster Messier 67
• The X-ray Emissivity of Low-Density Stellar Populations
• New insights into the rotational evolution of near-solar age stars from the open cluster M67
• Comparison of the Asteroseismic Mass Scale of Red Clump Giants with Photometric Mass Estimates
• The White Dwarfs of the Old, Solar Metallicity Open Star Cluster Messier 67: Properties and Progenitors
• Revisiting the luminosity function of single halo white dwarfs
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• The Initial-Final Mass Relation for Hydrogen-Deficient White Dwarfs
• Bayesian Hierarchical Modelling of Initial-Final Mass Relations Across Star Clusters
• M67 Blue Stragglers with High-resolution Infrared Spectroscopy
• Asteroseismic Study of Subgiants and Giants of the Open Cluster M67 using Kepler/K2: Expanded Sample and Precise Masses
• Time-resolved Spectroscopy of the Polar EU Cancri in the Open Cluster Messier 67
• A bag of tricks: Using proper motions of Galactic stars to identify the Hercules ultra-faint dwarf galaxy members
• Variable Stars and Stellar Populations in Andromeda XXVII: IV. An off-centered, disrupted galaxy
• The "canonical" White Dwarf Cooling Sequence of M5
• Multipopulation aftereffects on the color-magnitude diagram and Cepheid variables of young stellar systems
• Chromospheric emission of solar-type stars with asteroseismic ages