QQ Vir at Shanghai
Time-resolved high-resolution spectroscopy
of the pulsating sdB star   QQ Vir (PG1325+101)

John Telting et al.,   Shanghai,   July 2009
page 17
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New time-resolved high-resolution spectroscopy of QQ Vir  
 

To investigate the line-profile variations of the main mode, we folded
the 776 spectra of QQ Vir according to pulsational phase, onto 12 bins.

The pulsational line-profile variability of the He 4471 line is evident