Table 1
Amplitudes and offsets of a sinusoidal fit to the emission line signatures.
| Line | A | Vz | φ0 |
| (km s-1) | (km s-1) | (deg) | |
|
|
|||
| He II 4686 | 3.06 ± 0.28 | 0.66 ± 0.19 | 11.8 ± 0.8 |
| He I 4713 | 1.74 ± 0.26 | 4.55 ± 0.19 | 3.1 ± 1.4 |
| He I 5875 | 1.03 ± 0.19 | 4.46 ± 0.14 | −0.3 ± 1.8 |
| He I 6678 | 0.81 ± 0.12 | 3.28 ± 0.09 | −2.7 ± 1.5 |
| Fe II 4351 | 1.06 ± 0.16 | 0.70 ± 0.11 | 9.8 ± 1.3 |
| Fe II 4549 | 1.10 ± 0.18 | 2.85 ± 0.12 | 8.5 ± 1.4 |
| Fe II 5316 | 0.99 ± 0.16 | 1.86 ± 0.11 | 8.0 ± 1.4 |
| Fe II 5362 | 0.75 ± 0.15 | 1.26 ± 0.11 | −0.19 ± 1.9 |
| Fe I 4215 | 1.05 ± 0.16 | 3.14 ± 0.10 | 4.8 ± 1.2 |
| Fe I 4533 | 1.58 ± 0.33 | 3.00 ± 0.24 | 0.7 ± 2.0 |
| Fe I 5270 | 0.86 ± 0.14 | 0.12 ± 0.09 | 6.2 ± 1.4 |
| Fe I 5370 | 1.50 ± 0.24 | 0.72 ± 0.19 | 2.9 ± 1.7 |
| Fe I 5371 | 1.15 ± 0.18 | -0.06 ± 0.12 | 4.4 ± 1.3 |
| Mg I 51671 | 0.83 ± 0.17 | 3.44 ± 0.12 | 4.8 ± 1.8 |
| Mg I 5172 | 0.71 ± 0.13 | 0.21 ± 0.09 | 4.8 ± 1.3 |
| Mg I 5183 | 1.06 ± 0.14 | 0.41 ± 0.10 | 3.9 ± 1.2 |
| Ca II 84982 | 0.31 ± 0.07 | 0.33 ± 0.05 | −2.6 ± 2.3 |
| Ca II 86622 | 0.14 ± 0.10 | 1.46 ± 0.07 | 1.7 ± 6.1 |
Notes. Fitting the dynamical signatures (Fig. 6) with a sinusoidal modulation (RV = V0 + Vz + Asin[2π(φ+φ0)]). “A” (amplitude) refers to the strength of the sinusoidal modulation, “Vz” (zero-point velocity) is the general offset of the line, after taking into account the zero-point velocity of the star (V0 = −0.52 km s-1; K14), The phase is “φ” (for a 7.417d period), and “φ0”, the phase offset. The values here correspond to the best fit, but some of the parameters, such as the amplitude, have a relatively large spread (0.5−1.0 km s-1) comparing data taken at different dates and similar phases.
The modulation of the Ca II lines is not significant, as explained in the text. The fits for the Ca II lines are listed to show the evident differences (especially regarding the amplitude) with the rest of lines that have periodic modulations consistent with those of He II and the photospheric absorption lines.
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