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Table 4

Detected orbits with Gaia astrometric excess noise εDR1 > 0.85 mas.

Source a sin i ϵ aphot Ic Mc,true ΔV MCMC
(mas) (mas) (mas) (mas) (°) (M) Acceptance
1σ 3σ 1σ 3σ 1σ 3σ 1σ 3σ rate
Strong constraint on inclination and mass (Ic,max,3σ < 89.5°)

HD 205521 1.42 2.597 (6.58, 24.40) (2.97, 12.47) (0.13, 0.68) (3.27, 11.13) 0.2610
                       
HD 98451 5.68 2.286 (5.44, 15.06) (21.08, 89.50) (0.12, 0.43) (4.57, 10.11) 0.2819
                       
HD 238135 11.15 3.017 (11.10, 17.48) (34.73, 87.58) (0.32, 0.65) (2.513, 6.421) 0.2959
                       
HD 8291 4.691 1.976 (4.608, 16.70) (15.43, 88.39) (0.10, 0.47) (4.699, 11.43) 0.2729

Lower limit on inclination and upper limit on mass (Ic,max,3σ >89.5°)

HD 352975 2.381 0.9703 <2.838 <4.271 >56.44 >29.83 <0.29 <0.56 >5.529 >2.769 0.2759
HD 25603 9.749 2.225 <12.43 <16.67 >51.23 >32.04 <0.42 <0.70 >5.689 >2.654 0.2318
HD 26596 2.965 1.158 <3.389 <4.352 >61.19 >44.52 <0.14 <0.19 >10.10 >8.442 0.2604
HD 140208 3.776 1.454 <4.186 <5.605 >64.11 >38.07 <0.42 <0.68 >6.266 >3.159 0.2162

Notes. All sources belong to the primary dataset of Gaia DR1. When the 3σ upper-limit on the orbital inclination is above 89.5°, the constraint on the companion true mass is handled as an upper-limit.

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