Volume 618, October 2018
|Number of page(s)||9|
|Section||Numerical methods and codes|
|Published online||18 October 2018|
Binary orbits from combined astrometric and spectroscopic data
Astrophysics Group, Blackett Laboratory, Imperial College London,
Prince Consort Road,
Accepted: 1 January 2018
An efficient Bayesian technique for estimation problems in fundamental stellar astronomy is tested on simulated data for a binary observed both astrometrically and spectroscopically. Posterior distributions are computed for the components’ masses and for the binary’s parallax. One thousand independent repetitions of the simulation demonstrate that the 1- and 2-σ credibility intervals for these fundamental quantities have close to the correct coverage fractions. In addition, the simulations allow the investigation of the statistical properties of a Bayesian goodness-of-fit criterion and of the corresponding p-value. The criterion has closely similar properties to the traditional χ2 test for minimum-χ2 solutions.
Key words: binaries: visual / binaries: spectroscopic / stars: fundamental parameters / methods: statistical
© ESO 2018
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.