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Figure 1:
A randomly chosen set of the normalised disentangled Si III profiles of
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Figure 2: Top ( bottom): line profile measurements taken on HJD 2 450 742.4691 (HJD 2 450 194.9224). The observed spectrum of the primary shifted with +53.39km s-1 (-55.34 km s-1) is given by the full black line and the KOREL disentangled profile in the rest frame of the primary by the dotted line. The gray profile is the observed one from which the disentangled profile of the secondary is subtracted after applying its orbital shift of -57.84 km s-1 (62.70 km s-1) and to which a subsequent orbital shift towards the rest frame of the primary +53.39 km s-1 (-55.34 km s-1) is applied. The vertical lines indicate the integration boundaries we used to calculate the velocity moments from the Si III profiles centered at 4552.654 Å and 4567.872 Å. At the bottom of each figure the residual disentangled and secondary removed spectra with respect to the observed spectrum are also shown, after an arbitrary shift towards flux level 0.88. |
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Figure 3: Lomb-Scargle periodogram of the RV ( left) and EW ( right) derived from the disentangled Si III 4552.654 Å profiles of the primary. On top of each panel, the window function, shifted according to the highest peak in the periodogram, is shown. |
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Figure 4:
The first three normalised moments (without prewhitening in case of
f1; after prewhitening with f1 in case of f2 and f3) of the Si III 4552.654 Å line of ![]() ![]() ![]() ![]() |
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Figure 5: Lomb-Scargle periodograms of the residuals of the EW ( left) and first velocity moment ( right) of the disentangled Si III 4552.654 Å profiles of the primary after prewhitening with f1 = 4.99922 c d-1. The frequencies reported in the literature are indicated by dashed lines: 4.8678 c d-1, 5.2767 c d-1 (Lomb & Shobbrook 1975), 0.2809 c d-1, 2.2498 c d-1 and 5.6950 c d-1 (WIRE, Cuypers et al. 2004). |
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Figure 6:
IPS diagrams for f1, f2 and f3 and their first harmonic,
calculated from the Si III 4552.654 Å ( left) and 4567.874 Å ( right) line of
the disentangled profiles. The top panel shows the average line profile. Each of
the three sub-panels shows the distribution of the phase (expressed in ![]() |
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Figure 7:
Mean profile and phase and amplitude diagrams for f1 centered at
4552.654 Å. The solid black line represents the diagnostics derived from the
disentangled spectra. The other lines are derived from theoretically
calculated profiles, with different ![]() ![]() |
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Figure 8:
Phase distribution across the 4552.654 Å profile for sinusoidal fits
with f2 ( left) and f3 ( right). The solid black line represents the
diagnostics derived from the disentangled spectra. The other lines are derived
from theoretically calculated profiles, with different ![]() ![]() |
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Figure 9: The first three velocity moments (dots) computed from 40 averaged spectra in the region near Si III 4552.654 Å over the pulsation cycle of f1 = 4.99922 c d-1. The crossed and dashed lines correspond respectively to theoretical moments computed for the first two best solutions of the upper part of Table 3. The full line corresponds to the best solution for a model with f1 and 2f1 (indicated in bold in Table 4). |
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Figure 10:
The Si distribution on the surface of ![]() ![]() ![]() ![]() ![]() |
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Figure 11:
A phase plot of the first two moments of the disentangled Si III 4552.654
line profiles folded with
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