SIMBAD references

The δ Scuti variable star HD 93044 was observed with the 60cm telescope at the Xinglong Station of the Beijing Astronomical Observatory from 1992 to 1993. Period analyses were made for the 1992 data set, the 1993 data set, and the combined 1992-1993 data set. Besides the known three frequencies: 11.90809, 16.798 and 22.074c/d, two new frequencies of 2.086 and 10.489c/d were found. Some amplitude variations of two pulsation components (11.90809, 22.074c/d) were obvious. The new frequency of 2.086c/d might be the interaction mode from which the resonances can occur and then lead to the nonlinear phenomena in the δ Scuti variable star.