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Table 2.

RR Lyrae stars and other types of variable stars with Near (N) or Bound (B) resolved candidate companions.

Target ϖG2 Period Total N B Vis. Comment
(mas) (d)
RR Lyrae with Bound candidates
OV And 0.938 0.471 9 1 1 Tight, high probability bound companion
CS Del 0.635 0.366 7 1 1 Very tight, high probability bound companion
V0893 Her 2.679 0.492 13 1 1 High probability bound, slight PM difference
RR Leo 1.032 0.452 1 1 1 Tight, high probability bound system
SS Oct 0.862 0.622 / 0 3 1 1 Very tight bound companion
EY Oph 1.850 NA 36 2 1 Slight PM divergence, possibly bound companion
V0487 Sco 1.069 0.329 59 1 1 Fast PM, probably bound companion

RR Lyrae with Near candidates
V0830 Cyg 0.618 0.401 / 0 27 1 0 Probable chance association
CZ Lac 0.852 0.432 / 0 25 1 0 PMa, probably bound, triple system
V0424 Lyr 1.579 0.580 / 0 33 1 0 Rich star field, probable chance association
AG Nor 0.978 0.505 68 3 0 Close parallax value, possibly comoving
KP Nor 0.520 NA 25 1 0 PM difference, chance association
IT Oph 6.206 NA 578 1 0 Dense star field, chance association
MS Oph 0.658 NA 26 1 0 Probable chance association
V1693 Oph 0.677 0.522 27 1 0 Uncertain association
UY Ori 2.840 NA 18 1 0 Divergent PM vectors
V1154 Ori 1.087 NA 51 1 0 Probable comoving association
V0701 Sgr 2.000 0.627 127 2 0 PM difference, chance association
V2481 Sgr 0.910 NA 105 1 0 Divergent PM, chance association
V2626 Sgr 1.363 0.462 88 1 0 Slight PM position angle difference, uncertain
V3531 Sgr 0.765 0.542 26 1 0 Very wide, unlikely association
V4107 Sgr 1.265 NA 224 1 0 Dense stellar field, association unclear
V4313 Sgr 1.700 NA 279 2 0 Possible comoving group
V4355 Sgr 2.433 NA 361 5 0 Probable chance association
V4591 Sgr 1.837 NA 276 1 0 PM difference, chance association
IY Sco 2.530 NA 309 2 0 Rich star field, chance association
KN Sco 0.959 NA 43 1 0 Unlikely association
V0828 Sco 0.877 NA 33 1 0 PM difference, chance association
V0348 Sct 1.249 NA 45 1 0 Chance association

Other variable types with Bound candidates
HM Aql 1.829 0.345 28 1 1 Relatively wide companion, likely bound
EN CMi 0.569 0.540 8 1 1 Wide, high probability bound candidate
NQ Cyg 0.938 0.312 25 1 1 Eclipsing binary, fast PM, probably bound companion
V1391 Cyg 1.232 0.596 17 1 1 Eclipsing binary, tight companion
V2121 Cyg 25.597 0.800a 3 1 1 γ Dor pulsator, PMa, fast proper motion
UU Dor 0.856 NA 5 1 1 Eclipsing binary, tight high probability bound companion
IW Lib 3.571 1.783b 22 1 1 W UMa eclipsing, high probability bound companion
AZ Men 1.088 0.318 8 1 1 High probability bound companion
V1171 Oph 1.099 NA 16 2 1 Uncertain variable class, high probability bound companion
V1330 Sgr 1.229 0.427 193 2 1 Wide, uncertain companion
V1382 Sgr 1.611 0.493 316 1 1 Comoving candidate, slight PM difference
V2248 Sgr 1.948 0.315 22 1 1 W UMa eclipsing, high probability bound companion
V3166 Sgr 6.646 NA 192 3 2 Uncertain variable class, two high probability bound
HR Sco 7.370 NA 425 2 1 Uncertain variable class, dense field, likely chance association

Notes. A mention of “/0” after the period indicates a fundamental mode pulsator as identified in the GDR2 catalog (rrlyrae table). The observational properties and field charts of the RRLs and their associated candidate companions are presented in Appendix B.

References. (a)Cuypers et al. (2009); (b)Pojmanski (2002).

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