Revisiting symbiotic binaries with interferometry - I. The PIONIER archival collection

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Volume 695 (March 2025)

A&A, 695 (2025) A61

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Table 3.

Gaia DR3 (Gaia Collaboration 2023b) data for the target stars.

Object	BP	G	RP	GOF ^(a)	RUWE ^(b)	ϖ	Dist. (inv.)	Dist. (B–J)	Dist. (lit.)	Ref.
	[mag]	[mag]	[mag]			[mas]	[pc]	[pc]	[pc]
AG Peg	8.8	7.8	6.7	9.56	1.36	0.754±0.035	1326 $_{- 59}^{+ 65}$ $^{+65}_{-59}$	1272 $_{- 49}^{+ 51}$ $^{+51}_{-49}$	800	1
FG Ser	11.9	9.7	8.4	1.06	1.05	0.625±0.046	1600 $_{- 110}^{+ 127}$ $^{+127}_{-110}$	1472 $_{- 90}^{+ 112}$ $^{+112}_{-90}$	1100±200	2
ER Del	10.5	9.0	7.9	1.24	1.04	0.483±0.025	2070 $_{- 102}^{+ 113}$ $^{+113}_{-102}$	1903 $_{- 89}^{104}$ $^{104}_{-89}$	1750–2600	3
V1261 Ori	7.2	5.8	4.7	69.75	4.77	2.617±0.125	382 $_{- 17}^{+ 19}$ $^{+19}_{-17}$	375 $_{- 17}^{+ 17}$ $^{+17}_{-17}$	510 $_{- 215}^{+ 375}$ $^{+375}_{-215}$	3
RW Hya	9.0	8.1	7.1	6.79	1.27	0.648±0.035	1543 $_{- 79}^{+ 88}$ $^{+88}_{-79}$	1479 $_{- 81}^{+ 67}$ $^{+67}_{-81}$	820±112	4
V399 Pav	11.5	9.9	8.7	−1.52	0.96	0.285±0.043	3509 $_{- 460}^{+ 623}$ $^{+623}_{-460}$	3238 $_{- 387}^{+ 465}$ $^{+465}_{-387}$	3710±297	5

Notes. The magnitudes, goodness-of-fit (GOF), RUWE, and parallax (ϖ) from Gaia DR3 are shown. The distances obtained from the inversion of the parallax are listed together with the geometric distances from Bailer-Jones et al. (2021), and estimates from the published literature.

^(a)

GOF statistic for the astrometric solution. According to the Gaia DR3 documentation, values ≳3 indicate a poor fit to the data.

^(b)

Renormalized unit weight error (RUWE). Values around 1.0 are expected for sources well-fitted by a single-star model, while significantly higher values may indicate issues with the astrometric solution or the presence of binarity (see, e.g., Penoyre et al. 2022; Castro-Ginard et al. 2024). Note that RUWE enters into the formula for the GOF. Therefore, if RUWE indicates a poor solution, it is probable GOF will as well. (1) Kenyon et al. (1993); (2) Mürset et al. (2000); (3) Boffin et al. (2014); (4) Skopal (2005); (5) Gutiérrez-Moreno et al. (1997).

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