Dataset Open Access

wide binaries from Gaia DR2

Kareem El-Badry

This is a catalog of 378,488 wide binary candidates selected using data from Gaia DR2. The catalog construction procedure is similar to that outlined in this paper, but the search is extended to larger distances (d < 1 kpc), lower astrometric SNR (parallax_over_error > 10), and wider separations (s < 1 pc). 

The included pdf shows the separation distribution, and the red dashed line shows an estimate of the contamination rate from chance alignments. For the full catalog, contamination is negligible at s < 50,000 AU, but it becomes dominant at wider separations, such that it completely overwhelms the real binaries at s ~ 1 pc. It is, however, possible to construct subsamples that are pure out to wider separations by selecting binaries with (a) larger parallaxes, (b) higher astrometric SNR, or (c) larger plane-of-the-sky velocities with respect to the Sun. 

If you use this catalog for your research, please cite this dataset and the paper linked above. For questions or comments, contact Kareem El-Badry. 

Files (312.6 MB)
Name Size
binaries_1_kpc_snr_10_1pc_full.fits.gz
md5:7d54280e17d27f460a524373a1d07562
312.6 MB Download
large_catalog_separation_distribution_and_contamination_estimate.pdf
md5:5fb030f659f0e8ba52af6741b6513cc9
18.7 kB Download
172
173
views
downloads
All versions This version
Views 172172
Downloads 173172
Data volume 13.1 GB13.1 GB
Unique views 153153
Unique downloads 129128

Share

Cite as