000006821 001__ 6821
000006821 005__ 20250116194752.0
000006821 0247_ $$2DOI$$a10.1093/mnras/stae2258
000006821 037__ $$aSCART-2024-0083
000006821 100__ $$aSarkar, Mrinmoy
000006821 245__ $$aThe pulsating variable HD 118660 through the magnifying glass of asteroseismology. TESS photometry
000006821 260__ $$c2024
000006821 520__ $$aWe present the results of an asteroseismic study of HD 118660 (TIC 171729860), being a chemically peculiar (mild Am) star exhibiting δ Scuti (δ Sct) pulsations. It is based on the analysis of two sectors of time-series photometry from the space mission TESS (Transiting Exoplanet Survey Satellite) and seismic modelling. It yielded the detection of 15 and 16 frequencies for TESS sectors 23 and 50, respectively. The identified pulsation modes include four radial (l = 0) and five dipolar (l = 1) ones. The radial modes are overtones with order n ranging from 3 and 6. Such high values of n are theoretically not expected for stars with the effective temperature of HD 118660 (Teff ≈ 7550 K) located near the red edge of the δ Sct instability strip. To estimate the asteroseismic parameters, we have generated a grid of stellar models assuming a solar metallicity (Z = 0.014) and different values for the convective overshooting parameter (0.1 ≤ α_{ov} ≤ 0.3). We conclude that the analysis of the radial modes is insufficient to constrain αov and Z for δ Sct stars. The value for the equatorial velocity of HD 118660 derived from the seismic radius and the rotational frequency is consistent with values found in the literature.
000006821 536__ $$aBL/$$c33/$$fIN12 (BINA)
000006821 594__ $$aNO
000006821 6531_ $$aasteroseismology
000006821 6531_ $$aconvection
000006821 6531_ $$adiffusion
000006821 6531_ $$astars: activity
000006821 6531_ $$astars: chemically peculiar
000006821 6531_ $$astars: evolution
000006821 700__ $$aJoshi, Santosh
000006821 700__ $$aDupret, Marc-Antoine
000006821 700__ $$aTrust, Otto
000006821 700__ $$aDe Cat, Peter
000006821 700__ $$aSemenko, Eugene
000006821 700__ $$aLampens, Patricia
000006821 700__ $$aGoswami, Aruna
000006821 700__ $$aMkrtichian, David
000006821 700__ $$aKarinkuzhi, Drisya
000006821 700__ $$aYakunin, Ilya
000006821 700__ $$aGupta, Archana
000006821 773__ $$c3211--3220$$n4$$pMonthly Notices of the Royal Astronomical Society$$v534$$y2024
000006821 8560_ $$fpeter.decat@ksb-orb.be
000006821 8564_ $$s1788741$$uhttps://publi2-as.oma.be/record/6821/files/Sarkar2024_MNRAS534_3211.pdf
000006821 8564_ $$s4317$$uhttps://publi2-as.oma.be/record/6821/files/Sarkar2024_MNRAS534_3211.gif?subformat=icon$$xicon
000006821 8564_ $$s7340$$uhttps://publi2-as.oma.be/record/6821/files/Sarkar2024_MNRAS534_3211.jpg?subformat=icon-180$$xicon-180
000006821 905__ $$apublished in
000006821 980__ $$aREFERD