A full-sky 20pc census of stars & BDs

DOI

A complete accounting of nearby objects-from the highest-mass white dwarf progenitors down to low-mass brown dwarfs-is now possible, thanks to an almost complete set of trigonometric parallax determinations from Gaia, ground-based surveys, and Spitzer follow-up. We create a census of objects within a Sun-centered sphere of 20pc radius and check published literature to decompose each binary or higher-order system into its separate components. The result is a volume-limited census of ~3600 individual star formation products useful in measuring the initial mass function across the stellar (~5M_Jup_) regimes. Comparing our resulting initial mass function to previous measurements shows good agreement above 0.8M_{sun} and a divergence at lower masses. Our 20pc space densities are best fit with a quadripartite power law, {xi}(M)=dN/dM{propto}M^-{alpha}^, with long-established values of {alpha}=2.3 at high masses (0.55<M<8.00M{sun}), and {alpha}=1.3 at intermediate masses (0.22<M<0.55M{sun}), but at lower masses, we find {alpha}=0.25 for 0.05<M<0.22M{sun}_, and {alpha}=0.6 for 0.01<M=50mas not included in our 20-pc census)

Cone search capability for table J/ApJS/271/55/table4 (The 20-pc census)

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Cone search capability for table J/ApJS/271/55/table5 (New 20-pc accelerators from the Khovritchev & Kulikova 2015, J/PAZh/41/896 sample)

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Cone search capability for table J/ApJS/271/55/table9 (New 20-pc multiple systems identified through LUWE)

Cone search capability for table J/ApJS/271/55/table10 (Mass measurements and estimates for white dwarfs in the 20-pc census)

Cone search capability for table J/ApJS/271/55/table11 (Giants and subgiants in the 20-pc census)

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Cone search capability for table J/ApJS/271/55/tablea2 (Spectroscopic follow-up)

Cone search capability for table J/ApJS/271/55/tablea3 (Preliminary parallax and motion fits for objects on the NPARSEC parallax programs)

Cone search capability for table J/ApJS/271/55/tablea4 (Astrometry on the Gaia DR3 reference frame for CWISE J181125.34+665806.4; see Section A.3.2.)

Cone search capability for table J/ApJS/271/55/tableb1 (The proximal systems for each constellation; See Appendix B)

Identifier
DOI http://doi.org/10.26093/cds/vizier.22710055
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/271/55
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/271/55
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/271/55
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/271/55
Provenance
Creator Kirkpatrick J.D.; Marocco F.; Gelino C.R.; Raghu Y.; Faherty J.K.,Bardalez Gagliuffi D.C.; Schurr S.D.; Apps K.; Schneider A.C.,Meisner A.M.; Kuchner M.J.; Caselden D.; Smart R.L.; Casewell S.L.,Raddi R.; Kesseli A.; Stevnbak Andersen N.; Antonini E.; Beaulieu P.,Bickle T.P.; Bilsing M.; Chieng R.; Colin G.; Deen S.; Dereveanco A.,Doll K.; Durantini Luca H.A.; Frazer A.; Gantier J.M.; Gramaize L.,Grant K.; Hamlet L.K.; Higashimura H.; Hyogo M.; Jalowiczor P.A.,Jonkeren A.; Kabatnik M.; Kiwy F.; Martin D.W.; Michaels M.N.,Pendrill W.; Pessanha Machado C.; Pumphrey B.; Rothermich A.; Russwurm R.,Sainio A.; Sanchez J.; Sapelkin-Tambling F.T.; Schumann J.; Selg-Mann K.,Singh H.; Stenner A.; Sun G.; Tanner C.; Thevenot M.; Ventura M.,Voloshin N.V.; Walla J.; Wedracki Z.; Adorno J.I.; Aganze C.; Allers K.N.,Brooks H.; Burgasser A.J.; Calamari E.; Connor T.; Costa E.,Eisenhardt P.R.; Gagne J.; Gerasimov R.; Gonzales E.C.; Hsu C.-C.,Kiman R.; Li G.; Low R.; Mamajek E.; Pantoja B.M.; Popinchalk M.,Rees J.M.; Stern D.; Suarez G.; Theissen C.; Tsai C.-W.; Vos J.M.,Zurek D.; The Backyard Worlds: Planet 9 Collaboration
Publisher CDS
Publication Year 2024
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; Exoplanet Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy