4. Discussion and conclusions
It is apparent that we got PG 0856+121 during a pulsation phase. Pulsations in the same frequency range, although with a lower resolution, were found also during the short run of April 14, 1998, but they were absent or under the detection threshold in December 1998. At the moment we are not able to recognize the nature of these pulsations,and in particular to confirm their stability; however the values of the pulsation periods and amplitudes suggest that PG 0856+121 could be a new member of the pulsating EC14026-type stars. Further observations are needed to confirm this thesis.
© European Southern Observatory (ESO) 2000
Online publication: January 31, 2000