Searching for substellar companion candidates with Gaia - I. Introducing the GaiaPMEX tool

Open Access

Fig. D.1

Distribution of $χ_{astro}^{2}$ $\chi^{2}_{\text{astro}}$ calculated from 10,000 simulations of GJ 832 astrometric data as a single star. They are compared to a theoretical χ² probability density function with respectively N − 5 degrees of freedom (red line) and to the normal distribution expressed in Eqs. D.8 and D.9 (green line).

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