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In their paper, DLS claim that they observed, on one spectrum, a small emission
around phase in the violet wing of the CaiiK
line in only one of the two consecutive pulsation cycles they monitored.
Figure:
The thin line is the average spectrum corresponding
to Fig.1. The thick lines represent the spectra of Pup around
pulsation phases (indicated on the right of the figure)
and 1.78.
The width and the height of the emission detected by DLS is represented
by the small inverse ``T'' symbol at our two expected emission phases
and 1.78.
The small shifts between the different spectra and the average one are
mainly due to normalization process.
Note that the scale is the same as the one used by DLS
|
Fig.
shows that no particular emission, such as the one observed by DLS, is present.
However, as mentionned in PaperI, the best way to detect the presence of
the emission is to display the differential spectra, obtained by subtraction of
each spectrum from a mean spectrum representing their average over one pulsation cycle.
Results are presented in
Fig..
The changes between consecutive files are continuous and only reveal
the atmospheric pulsation motion.
Obviously, no emission feature is detected here.
Figure:
All the differential spectra are represented, at the same scale
as that of Fig.3.
The continuous vertical line corresponds to the wavelength at
which the emission occurs in DLS.
The dashed vertical line corresponds to the laboratory wavelength.
The small inverse ``T'' symbol has the same meaning as in Fig.3
|
Next: Discussion and conclusion
Up: Results
Previous: Radial velocities
8/13/1998