Table 2
Our sample, containing four FGK+M binaries and eight single M dwarfs.
| Target | Sp. Type | V | Ks | π [mas] | Ang. sep. | v sin i [km s-1] | log(LX/Lbol) | Planets | References | |
|
|
||||||||||
| HIP 12048 A | G5 | 6.816 | 5.266 | 25.67 | 6.20′′ | 1.9 | yes | 1, 10, 21, 31 | ||
| HIP 12048 B | M2.5 | 8.766 | 25.67 | 6.20′′ | 5 | |||||
| GJ 527 A | F6 | 4.480 | 3.36† | 64.03 | 1.80′′ | 15 | −6.14‡ | yes | 2, 10, 19, 22, 34 | |
| GJ 527 B | M2 | 11.1 | 64.03 | 1.80′′ | 3, 12 | |||||
| GJ 250 A | K3.5 | 6.581 | 4.107 | 114.81 | 58.70′′ | 1.8 | no | 6,10, 21 | ||
| GJ 250 B | M2.3 | 10.032 | 5.723 | 114.81 | 58.70′′ | <2.5 | 5, 10, 14 | |||
| HIP 57172 A | K2 | 8.215 | 6.147 | 34.24 | 73.10′′ | 0.7 | yes | 4, 10, 18, 29 | ||
| HIP 57172 B | M0-M1 | 10.604 | 7.107 | 34.24 | 73.10′′ | 6, 10 | ||||
| GJ 176 | M2.2 | 9.951 | 5.607 | 107.83 | <0.8 | −4.46 | yes | 4, 11, 17, 27, 33 | ||
| GJ 317 | M3.5 | 12.00 | 7.028 | 65.3 | <2.5 | −4.57 | yes | 7, 9, 14, 28, 35 | ||
| GJ 436 | M2.8 | 10.663 | 6.073 | 98.61 | 1.0 ± 0.9 | −6.36 | yes | 4, 10, 19, 23, 35 | ||
| GJ 581 | M3.2 | 10.567 | 5.837 | 158.79 | 0.4 ± 0.3 | <−4.57 | yes | 4, 11, 19, 25, 35 | ||
| GJ 628 | M3.6 | 10.075 | 5.075 | 232.98 | 1.5 | −5.16 | no | 4, 11, 20, 32 | ||
| GJ 674 | M2.5 | 9.407 | 4.855 | 220.24 | <1 | −3.80 | yes | 4, 11, 13, 26, 35 | ||
| GJ 849 | M3.1 | 10.366 | 5.594 | 116.05 | <2.5 | −6.73 | yes | 8, 11, 16, 24, 35 | ||
| GJ 876 | M3.7 | 10.179 | 5.010 | 213.28 | 0.16 | −5.11 | yes | 4, 11, 15, 30, 35 | ||
Notes.
No value for GJ 527 B was found in the 2MASS catalogue, and we believe that the value in 2MASS contains both components due to the small separation in this binary.
The companions are unresolved in the XMM-Newton observations. Additionally, no V band magnitude could be found in the literature for HIP 12048 B and no previous determination of v sin i was found for HIP 12048 B, GJ 527 B, and HIP 57172 B.
Reference. Spectral types: 1. Eggen (1960); 2. Gray et al. (2003); 3. Gray et al. (2006); 4. Mann et al. (2015); 5. Mason et al. (2001); 6. Mugrauer et al. (2007); 7. Reid et al. (1995); 8. Torres et al. (2006). V-band photometry: 9. Bessel (1990); 10. Kharchenko (2001); 11. Koen et al. (2010); 12. Turon et al. (1993). All KS values are from 2MASS Cutri et al. (2003). Parallax: all parallax values are from Hipparcos (van Leeuwen 2007); which exception of GJ 317 that is taken from Anglada-Escudé et al. (2012). Angular separation: values taken from the Washington Double Star Catalog (Mason et al. 2001). Rotation velocities: 13. Bonfils et al. (2007); 14. Browning et al. (2010); 15. Correia et al. (2010); 16. Delfosse et al. (1998); 17. Forveille et al. (2009); 18. Lovis et al. (2005); 19. Marcy & Chen (1992); 20. Reiners (2007); 21. Valenti & Fischer (2005). Planet discoveries: 22. Butler et al. (1997); 23. Butler et al. (2004); 24. Butler et al. (2006); 25. Bonfils et al. 2005b; 26. Bonfils et al. (2007); 27. Endl et al. (2008); 28. Johnson et al. (2007); 29. Lovis et al. (2005); 30. Marcy et al. (1998); 31. Marcy et al. (2000). Activity: 32. Delfosse et al. (1998); 33. Forveille et al. (2009); 34. Lovis et al. (2005); 35. Poppenhaeger et al. (2010).
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