Free Access

Fig. 1

image

Wide binaries and multiple systems with common parallaxes and relatively small angular separations (see text) in the TGAS 25 pc sample. Shown are their total proper motions (top) and angular separations (bottom) as a function of the ratio of the absolute value of their total proper motion difference dpm (see Eq. (2)) to the estimated effect caused by orbital motion (pmo). The dotted line indicates the expected maximal ratio of 1. Systems discussed in the text are labelled in the top panel and indicated by thick red and blue open symbols. For comparison we added the values for Proxima with respect to alpha CenAB (filled magenta symbols), which are not included in TGAS. The symbol sizes increase with parallax.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.