A survey for line profile variability in early A-type stars has been performed in order to detect nonradial pulsation signatures .
The star HR 6139 , with spectral type A2V and estimated T _ { eff } = 8800 K , shows evident line profile variations that can be explained by oscillations in prograde g -modes .
This feature and the known photometric variability are similar to those observed in the Slowly Pulsating B-type stars .
However HR 6139 is much cooler than the cool border of the instability strip of such variables , and it is hotter than the blue edge of the \delta Scuti instability strip .
There are indications of a tiny variability also in other four objects , whose nature is not yet clear .