Gaia Data Release 1
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Table 1

Comparison between Hipparcos,TGAS, and HST parallaxes.

Name IDHIPPARCOS* ϖHIPPARCOS σ ϖ HIPPARCOS ϖ TGAS σ ϖ TGAS ϖ HST σ ϖ HST HST Reference
(mas) (mas) (mas) (mas) (mas) (mas)

Classical Cepheids

FF Aql** 93124 2.110 ± 0.330 1.640 ±0.89 2.810 ±0.180 Benedict et al. (2007)
SS CMa 36088 0.400 ±1.780 0.686 ±0.234 0.348 ±0.038 Casertano et al. (2016)
SY Aur 24281 –1.840 ±1.720 0.687 ±0.255 0.428 ±0.054 Riess et al. (2014)

Type II Cepheids

VY Pyx 434736 5.00 ± 0.44 3.85 ± 0.28 6.44 ± 0.23 Benedict et al. (2011)

RR Lyrae stars

RR Lyr 95497 3.46 ±0.64 3.64 ±0.23 3.77 ±0.13 Benedict et al. (2011)
RZ Cep 111839 0.59 ±1.48 2.65 ±0.24 2.12 (2.54)*** ±0.16 Benedict et al. (2011)
SU Dra 56734 0.20 ±1.13 1.43 ±0.29 1.42 ±0.16 Benedict et al. (2011)
UV Oct 80990 2.44 ±0.81 2.02 ±0.22 1.71 ±0.10 Benedict et al. (2011)
XZ Cyg 96112 2.29 ±0.84 1.56 ±0.23 1.67 ±0.17 Benedict et al. (2011)

Notes.

(**)

Gallenne et al. (2012) have estimated the distance to FF Aql via the interferometric Baade-Wesselink technique; the corresponding parallax is 2.755 ± 0.554 mas.

(***)

Two different parallax values are provided for this star by Benedict et al. (2011); in the table we list both values.

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