Table 3
Results from the LSD analysis of the HARPSpol data obtained using a line mask that includes (wHe) or excludes (woHe) helium lines.
| Star & | Date | Mask | ⟨ Bz ⟩ (V) | FAP (V) | Detection | FAP (N) | Detection | S/N | S/N | # lines | |
| month/year | [G] | V | N | I | V LSD | ||||||
|
|
|||||||||||
| β CMa | 23 | wHe | − 8.4 ± 6.8 | 5.6 × 10-4 | MD | 1.0 × 10-1 | ND | 664 | 26 712 | 204 | |
| December | 26 | wHe | − 3.3 ± 5.6 | 9.7 × 10-4 | MD | 2.7 × 10-1 | ND | 681 | 31 809 | ||
| 2013 | 27 | wHe | − 22.4 ± 6.1 | 1.7 × 10-8 | DD | 6.3 × 10-1 | ND | 628 | 29 191 | ||
| 28 | wHe | − 5.8 ± 5.9 | 2.3 × 10-9 | DD | 1.8 × 10-4 | MD | 710 | 30 536 | |||
| 23 | woHe | − 9.4 ± 8.4 | 1.1 × 10-4 | MD | 4.8 × 10-2 | ND | 664 | 21 436 | 161 | ||
| 26 | woHe | − 1.3 ± 6.9 | 8.0 × 10-8 | DD | 1.5 × 10-2 | ND | 681 | 25 355 | |||
| 27 | woHe | − 19.4 ± 7.5 | 5.1 × 10-9 | DD | 5.3 × 10-1 | ND | 628 | 23 319 | |||
| 28 | woHe | − 16.1 ± 7.2 | 2.1 × 10-11 | DD | 1.1 × 10-1 | ND | 710 | 24 270 | |||
|
|
|||||||||||
| β CMa | 21 | wHe | − 29.0 ± 8.0 | 4.2 × 10-4 | MD | 2.0 × 10-1 | ND | 554 | 21 488 | 204 | |
| April | 21 | wHe | − 27.8 ± 7.9 | 3.2 × 10-3 | ND | 4.9 × 10-1 | ND | 607 | 22 821 | ||
| 2014 | 21 | wHe | − 28.8 ± 7.7 | 9.2 × 10-4 | MD | 8.3 × 10-1 | ND | 589 | 23 610 | ||
| 21 | wHe | − 21.9 ± 7.5 | 1.3 × 10-5 | MD | 3.7 × 10-1 | ND | 611 | 23 930 | |||
| 21 | wHe | − 24.0 ± 7.9 | 1.1 × 10-2 | ND | 8.4 × 10-1 | ND | 596 | 22 413 | |||
| 21 | wHe | − 26.4 ± 7.9 | 3.6 × 10-1 | ND | 1.7 × 10-2 | ND | 572 | 22 674 | |||
| Average | 21 | wHe | − 26.0 ± 3.2 | 2.7 × 10-14 | DD | 9.6 × 10-1 | ND | – | 55 602 | ||
| 21 | woHe | − 40.4 ± 10.1 | 3.6 × 10-3 | ND | 1.3 × 10-1 | ND | 554 | 17 110 | 161 | ||
| 21 | woHe | − 15.6 ± 9.7 | 3.4 × 10-3 | ND | 2.6 × 10-2 | ND | 607 | 18 202 | |||
| 21 | woHe | − 27.3 ± 9.4 | 1.4 × 10-3 | ND | 3.4 × 10-1 | ND | 589 | 18 863 | |||
| 21 | woHe | − 18.8 ± 9.2 | 3.6 × 10-8 | DD | 6.9 × 10-1 | ND | 611 | 19 124 | |||
| 21 | woHe | − 22.9 ± 9.7 | 1.4 × 10-5 | MD | 7.0 × 10-1 | ND | 596 | 17 934 | |||
| 21 | woHe | − 15.8 ± 9.6 | 7.3 × 10-3 | ND | 5.0 × 10-2 | ND | 572 | 18 112 | |||
| Average | 21 | woHe | − 23.2 ± 3.9 | 3.3 × 10-16 | DD | 9.7 × 10-1 | ND | – | 44 703 | ||
|
|
|||||||||||
| ϵ CMa | 23 | wHe | − 18.4 ± 4.7 | 5.3 × 10-5 | MD | 4.4 × 10-1 | ND | 634 | 30 733 | 153 | |
| December | 24 | wHe | − 1.5 ± 5.9 | 5.6 × 10-2 | ND | 6.3 × 10-2 | ND | 590 | 24 345 | ||
| 2013 | 27 | wHe | 0.0 ± 4.3 | 5.4 × 10-4 | MD | 5.7×10-1 | ND | 679 | 33 806 | ||
| 23 | woHe | − 11.0 ± 5.8 | 1.5 × 10-6 | DD | 4.1 × 10-1 | ND | 634 | 21268 | 119 | ||
| 24 | woHe | 9.3 ± 7.3 | 3.7 × 10-6 | DD | 2.9 × 10-1 | ND | 590 | 16 789 | |||
| 27 | woHe | 4.6 ± 5.3 | 3.1 × 10-11 | DD | 3.7 × 10-1 | ND | 679 | 23 398 | |||
|
|
|||||||||||
| ϵ CMa | 21 | wHe | − 6.6 ± 4.6 | 2.4 × 10-2 | ND | 4.6 × 10-2 | ND | 648 | 31 485 | 153 | |
| April | 21 | wHe | − 8.8 ± 4.6 | 2.8 × 10-2 | ND | 3.7 × 10-1 | ND | 631 | 31 261 | ||
| 2014 | 21 | wHe | − 1.4 ± 4.6 | 1.3 × 10-1 | ND | 6.2 × 10-3 | ND | 646 | 31 766 | ||
| 21 | wHe | − 8.6 ± 4.6 | 1.6 × 10-1 | ND | 7.9 × 10-1 | ND | 645 | 31 630 | |||
| 21 | wHe | 3.0 ± 4.6 | 4.7 × 10-4 | MD | 2.8 × 10-2 | ND | 606 | 31 571 | |||
| Average | 21 | wHe | − 4.5 ± 2.1 | 9.4 × 10-6 | DD | 1.5 × 10-1 | ND | – | 69 580 | ||
| 21 | woHe | − 9.3 ± 5.6 | 7.8 × 10-5 | MD | 1.4 × 10-1 | ND | 648 | 21 705 | 119 | ||
| 21 | woHe | 3.7 ± 5.7 | 1.4 × 10-3 | ND | 5.5 × 10-1 | ND | 631 | 21 533 | |||
| 21 | woHe | 3.9 ± 5.6 | 4.7 × 10-6 | DD | 5.2 × 10-3 | ND | 646 | 21 831 | |||
| 21 | woHe | 15.2 ± 5.6 | 7.8 × 10-3 | ND | 6.3 × 10-2 | ND | 645 | 21 726 | |||
| 21 | woHe | 4.0 ± 5.6 | 2.8 × 10-2 | ND | 3.5 × 10-1 | ND | 606 | 21 756 | |||
| Average | 21 | woHe | − 4.1 ± 2.5 | <10-16 | DD | 6.4 × 10-1 | ND | – | 48 535 | ||
Notes. The first two columns indicate the star name and the date of observation. Column three indicate the adopted line mask. Column four lists the ⟨ Bz ⟩ values obtained from each Stokes V LSD profile, for which the FAP is given in column five. Column six shows the detection flag obtained for each Stokes V LSD profile, where marginal (MD) and definite (DD) detections are marked in bold face (ND stays for non-detection). Column seven and eight give the FAP obtained from each LSD profile of the null spectrum and the relative detection flag, respectively. Column nine gives the S/N (per-pixel) of Stokes I, calculated over an 8 Å region at ~4990 Å. Column ten lists the S/N of the LSD Stokes V profile. The last column lists the number of lines used in the line mask. For β CMa and ϵ CMa, respectively, we adopted a range of 140 km s-1 (i.e., ±70 km s-1 from the line center) and 120 km s-1 (i.e., ±60 km s-1 from the line center) for the calculation of the magnetic field.
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