The Separation Distribution of Ultrawide Binaries across Galactic Populations
田海俊
We have compiled an extensive catalog of candidate wide binaries selected from Gaia DR2 in the solar neighborhood with distances $d<4$~kpc, following a procedure similar to that of El-Badry & Rix(2018). This initial candidate catalog consists of 807,611 possible binaries. Its contamination rates are lower than 10% at $a<20,000$~AU; however, the contamination rates quickly increase beyond 20,000~AU, until up to 100% at the largest separation bin, i.e., a = 1.0 pc. To address this, we subsequently applied additional selection criteria, tailored towards three kinematically-selected, presumably pure subsamples: 4361 disk-like, 10090 intermediate, and 4351 halo-like binaries.
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Paper Information
Paper Title:
The Separation Distribution of Ultrawide Binaries across Galactic Populations
Publication:
The Astrophysical Journal Supplement Series
Bibcode:
2020ApJS..246....4T
DOI:
10.3847/1538-4365/ab54c4
Identifier
DOI:
10.12149/101011
VO Identifier:
ivo://China-VO/paperdata/101011
Publication date:
2019-11-14
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This DOI represents all versions, and will always resolve to the latest one.
2019-11-14