1
$\begingroup$

I have list of stellar pairs from The Washington Double Star Catalog (WDS), i.e. I have next parameters:

  • angular separations
  • position angles
  • stellar magnitudes of both components

Additionally I have GAIA DR2 parallaxes (and other parameters) from SIMBAD database. How to distinguish between binary and optical stellar pairs?

$\endgroup$
2
$\begingroup$

If they are both in the Gaia DR2 catalogue, then a physical binary should have components with similar parallax and proper motion.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.