Pulsation of EE Cam

Details Pulsation of EE Cam Pulsation of EE Cam

2007-09-21

arxiv.org/abs/0709.3393v1

Astron.J.134:1994-1998,2007

Astronomy and Astrophysics

Astrophysics

13 pages, 3 figures, 3 tables

Scientific paper

10.1086/522795

EE Cam is a previously little studied Delta Scuti pulsator with amplitudes between those of the HADS (High-Amplitude Delta Scuti stars) group and the average low-amplitude pulsators. Since the size of stellar rotation determines both which pulsation modes are selected by the star as well as their amplitudes, the star offers a great opportunity to examine the astrophysical connections. Extensive photometric measurements covering several months were carried out. 15 significant pulsation frequencies were extracted. The dominant mode at 4.934 cd$^{-1}$ was identified as a radial mode by examining the phase shifts at different wavelengths. Medium-dispersion spectra yielded a $v\sin i$ value of $40 \pm 3$ km s$^{-1}$. This shows that EE Cam belongs to the important transition region between the HADS and normal Delta Scuti stars.

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