AAVSO: American Association of Variable Star Observers

KAO-EGYPT J064512.06+341749.2 is a Low Amplitude and Multi-Periodic δ Scuti Variable Star

Volume 47 number 1 (2019)

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Ahmed Essam
National Research Institute of Astronomy and Geophysics, 11421 Helwan, Cairo, Egypt; essam60@yahoo.com
Abdel-Sabour Mohamed
National Research Institute of Astronomy and Geophysics, 11421 Helwan, Cairo, Egypt; sabour2000@hotmail.com
Gamal Bakr Ali
National Research Institute of Astronomy and Geophysics, 11421 Helwan, Cairo, Egypt; mrezk9@yahoo.com

Abstract

CCD photometric observations with BVRI filters using the 1.88-m telescope of Kottamia Astronomical Observatory (KAO), Egypt, revealed that the star KAO-EGYPT J064512.06+341749.2 is a low-amplitude (Δm < 0.3 mag) δ Scuti star. The peak-to-peak amplitude is 0.014 magv. Two modes are present (f1 = 23.600 ± 0.133 c/d and f2 =18.314 ± 0.202 c/d). The frequency ratio, f2 / f1 = 0.776, suggests that the star is a radial pulsator. By using the empirical relations for KAO-EGYPT J064512.06+341749.2, we determined the global physical parameters.