The Gaia 20 pc white dwarf sample

Using Gaia DR2 data, we present an up-to-date sample of white dwarfs within 20pc of the Sun. In total we identified 139 systems in Gaia DR2, nine of which are new detections, with the closest of these located at a distance of 13.05pc. We estimated atmospheric parameters for all stellar remnants based on the Gaia parallaxes and photometry. The high precision and completeness of the Gaia astrometry allowed us to search for wide binary companions. We re-identified all known binaries where both components have accurate DR2 astrometry, and established the binarity of one of the nine newly identified white dwarfs. No new companions were found to previously known 20pc white dwarfs. Finally, we estimated the local white dwarf space-density to be (4.49+/-0.38)x10^-3^pc^-3^, having given careful consideration to the distance-dependent Gaia completeness, which misses known objects at short distances, but is close to complete for white dwarfs near 20pc.

Cone search capability for table J/MNRAS/480/3942/table1 (Astrometric and photometric data for our Gaia 20pc white dwarf sample, as well as the results from our model atmosphere fits)

Cone search capability for table J/MNRAS/480/3942/table2 (White dwarfs previously thought to reside within 20pc that are now confirmed to be outside the 20pc sample)

Cone search capability for table J/MNRAS/480/3942/table5 (Wide binaries identified in our 20pc white dwarf sample)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/480/3942
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/480/3942
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/480/3942
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/480/3942
Provenance
Creator Hollands M.A.; Tremblay P.-E.; Gansicke B.T.; Gentile-Fusillo N.P.,Toonen S.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy