Identification of new nearby white dwarfs using Gaia DR3

Abstract

Based on the astrometry and photometry in Gaia DR3, we identified new nearby white dwarfs and validated those that had been missed from recent white dwarf catalogues despite being previously documented. To ensure the reliability of their astrometric solutions, we used a cut on just two parameters from Gaia DR3: the amplitude of the image parameter determination goodness-of-fit and the parallax-over-error ratio. In addition, we imposed photometric signal-to-noise requirements to ensure the reliable identification of white dwarfs when using the colour-magnitude diagram. We have identified nine previously unreported white dwarfs within the local population of 50 pc, and validated 21 previously reported white dwarfs missing from the GCWD21 (Gentile Fusillo et al. 2021) and other recent volume-limited white dwarf samples. A few of these objects belong to the rare class of ultra-cool white dwarfs. Four white dwarfs in our sample have an effective temperature of $T_{eff}\le 4000$ K within the $1\sigma$ interval, and two of them have an absolute magnitude of $M_G>16.0$ mag. The identified white dwarfs are predominantly located in crowded fields, such as near the Galactic plane or in the foreground of the Large Magellanic Cloud. We also find that 19 of these white dwarfs have common proper motion companions with angular separations ranging from $1.1^{\prime \prime }$ to $7.1^{\prime \prime }$ and brightness differences between the components of up to 9.8 magnitudes. One of these systems is a triple system consisting of a white dwarf and two K dwarfs, while another is a double white dwarf system. We have identified 103 contaminants among the 2338 high-confidence white dwarfs in the 50 pc subsample of the GCWD21 and have found that their astrometric solutions in Gaia DR3 are spurious, improving the purity by 4.4%.

arXiv commentAccepted for publication in A&A on 02 December 2023. 15 pages, 14 figures. Abstract abridged due to arXiv's 1920 character limit

References in corpus (55)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• Gaia Data Release 2: The astrometric solution
• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• Gaia Early Data Release 3: The astrometric solution
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The GALAH Survey: Scientific Motivation
• Gaia Early Data Release 3: Photometric content and validation
• Gaia Data Release 2: Photometric content and validation
• SB9: The Ninth Catalogue of Spectroscopic Binary Orbits
• A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
• A $Gaia$ Data Release 2 catalogue of white dwarfs and a comparison with SDSS
• Gaia Early Data Release 3 -- Catalogue validation
• A Comprehensive Spectroscopic Analysis of DB White Dwarfs
• Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
• A catalogue of white dwarfs in Gaia EDR3
• On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model-Atmosphere Analysis of Hot White Dwarfs from SDSS DR12
• New evolutionary sequences for extremely low mass white dwarfs: Homogeneous mass and age determinations, and asteroseismic prospects
• The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution
• Gaia Data Release 3: Astrophysical parameters inference system (Apsis) I -- methods and content overview
• The White Dwarf Luminosity Function from SDSS Imaging Data
• Gaia Data Release 3: External calibration of BP/RP low-resolution spectroscopic data
• Axions and the cooling of white dwarf stars
• On the Measurement of Fundamental Parameters of White Dwarfs in the Gaia Era
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- I: Survey Description, Spectra and Radial Velocities
• Gaia Data Release 3. Astrometric binary star processing
• A classifier for spurious astrometric solutions in Gaia EDR3
• Gaia DR3 astrometric orbit determination with Markov Chain Monte Carlo and Genetic Algorithms. Systems with stellar, substellar, and planetary mass companions
• Analysis of hydrogen-rich magnetic white dwarfs detected in the Sloan Digital Sky Survey
• The ELM Survey. VIII. 98 Double White Dwarf Binaries
• The Future is Now: the Formation of Single Low Mass White Dwarfs in the Solar Neighborhood
• Formation of Extremely Low-mass White Dwarfs in Double Degenerates
• An empirical model of the Gaia DR3 selection function
• Cooling curves and initial models for low-mass white dwarfs (<0.25 Msun) with helium core
• Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the Virtual Observatory
• The Star Formation History of the Solar Neighbourhood from the White Dwarf Luminosity Function
• $\text{Gaia}$ white dwarfs within 40 pc III: spectroscopic observations of new candidates in the southern hemisphere
• Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods
• The Fifth Catalogue of Nearby Stars (CNS5)
• The star formation history in the solar neighborhood as told by massive white dwarfs
• Spectrophotometric analysis of magnetic white dwarf I: Hydrogen-rich compositions
• Constraints on the pairing properties of main sequence stars from observations of white dwarfs in binary systems
• The ELM Survey South. I. An Effective Search for Extremely Low Mass White Dwarfs
• First semi-empirical test of the white dwarf mass-radius relationship using a single white dwarf via astrometric microlensing
• A population synthesis fitting of the $Gaia$ resolved white dwarf binary population within 100 pc
• A Predicted Astrometric Microlensing Event by a Nearby White Dwarf
• Local stellar formation history from the 40 pc white dwarf sample
• White dwarf spectral type-temperature distribution from Gaia-DR3 and the Virtual Observatory
• Data-Driven Selection and Spectral Classification of White Dwarf Stars
• The Cooling of Massive White Dwarfs from Gaia EDR3
• Past, Present and Future Stars that can see Earth as a Transiting Exoplanet
• New ultracool dwarf neighbours within 20pc from Gaia DR2
• A spectroscopic search for White Dwarf companions to 101 nearby M dwarfs

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• Toward the fabric of the Milky Way I. The density of disk streams from a local $250^3$ pc${}^3$ volume
• On the Origins of "Hostless'' Supernovae: Testing the Faint-end Galaxy Luminosity Function and Supernova Progenitors with Events in Dwarf Galaxies
• Serendipitous observation of a white dwarf companion to a JWST/MIRI coronagraphic calibrator
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