000006692 001__ 6692
000006692 005__ 20240126170851.0
000006692 037__ $$aPOSTER-2024-0018
000006692 100__ $$aSarkar, Mrinmoy
000006692 245__ $$aAmplitude Modulation in a δ Scuti star HD118660
000006692 260__ $$c2023
000006692 269__ $$c2023-03-22
000006692 520__ $$aIn this paper, we report the detection of amplitude modulation in a δ Scuti star HD118660. We found that the p-mode frequency at 24.3837 d^{−1} varies periodically in amplitude with frequency 0.0558 ± 0.00147 d^{−1}. However, all other modes are stable in both amplitude and phase which is clear evidence of non-conservation of visible pulsation mode energy. We constructed a two-frequency model by superimposing two sinusoïds with frequencies ν_1 = 24.3837 d^{−1} and ν_2 = 24.4420 d^{−1} and corresponding phases φ_1 = 0.5211 rad and φ_2 = 0.9481 rad to mimic the observed variations of amplitude and phase with time. The plausible explanation of the amplitude modulation in HD 118660 is due to beating of two unresolved closed frequencies ν_1 and ν_2.
000006692 536__ $$aBL/$$c33/$$fIN12 (BINA)
000006692 594__ $$aNO
000006692 6531_ $$aStars: individual: HD118660
000006692 6531_ $$aStars: amplitude modulation
000006692 6531_ $$aTESS: δ Scuti pulsator
000006692 6531_ $$aChemically peculiar
000006692 6531_ $$aStars: oscillations
000006692 700__ $$aJoshi, Santosh
000006692 700__ $$aDe Cat, Peter
000006692 773__ $$t3rd BINA Workshop "Scientific Potential of Indo-Belgian Co-operation", Bhimtal, India
000006692 8560_ $$fpeter.decat@ksb-orb.be
000006692 980__ $$aCPOSTER