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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