000005506 001__ 5506
000005506 005__ 20230127130839.0
000005506 0247_ $$2DOI$$a10.1093/mnras/stab3515
000005506 037__ $$aSCART-2021-0158
000005506 100__ $$aKahraman Aliçavuş, F.
000005506 245__ $$aMass transfer and tidally tilted pulsation in the Algol-type system TZ Dra
000005506 260__ $$c2022
000005506 520__ $$aOscillating eclipsing Algols (oEAs) are remarkable systems which allow us to de- termine accurate fundamental stellar parameters (mass, radius) and probe the stellar interiors through pulsations. TZ Dra is an oEA system containing a δ Scuti component. To examine particular characteristics of such close systems including pulsations and mass transfer, we present a detailed photometric and spectroscopic study of TZ Dra. With the analysis of high-resolution spectra, the orbital parameters were determined by the radial velocity analysis and the atmospheric parameters were derived for the primary component. The binary modelling and the pulsational frequency analysis was carried out using the TESS data set. The Hα line profiles show the signature of mass transfer from the cool to the hot binary component. The conclusion of mass transfer/mass loss in the system was supported by the analysis of the orbital period changes. As a result, it was found that there is 3.52 × 10^−9 M_⊙ /year mass loss from the system most probably through the hotspot and stellar winds. Additionally, most pulsation frequencies originating from the primary component were found to be spaced by harmonics of the orbital frequencies in particular, twelve doublets spaced by 2f_orb were detected from which we infer that this star a tidally tilted pulsator. A mean p-mode frequency spacing of ≈ 7.2 d^−1 was found as well.
000005506 594__ $$aNO
000005506 6531_ $$astars: binaries: eclipsing
000005506 6531_ $$astars: atmospheres
000005506 6531_ $$astars: fundamental parameters
000005506 6531_ $$astars: variables: δ Scuti
000005506 6531_ $$astars: individual: TZ Dra
000005506 700__ $$aHandler, G.
000005506 700__ $$aAliçavuş, F.
000005506 700__ $$aDe Cat, P.
000005506 700__ $$aBedding, T. R.
000005506 700__ $$aLampens, P.
000005506 700__ $$aEkinci, Ö.
000005506 700__ $$aGümüs, D.
000005506 700__ $$aLeone, F.
000005506 773__ $$c1413--1424$$pMonthly Notices of the Royal Astronomical Society$$v510
000005506 8560_ $$fpeter.decat@observatoire.be
000005506 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2022MNRAS.510.1413K/abstract
000005506 8564_ $$s3492027$$uhttp://publi2-as.oma.be/record/5506/files/KahramanAliçavuş2022_MNRAS510_1413.pdf
000005506 8564_ $$s4277$$uhttp://publi2-as.oma.be/record/5506/files/KahramanAliçavuş2022_MNRAS510_1413.gif?subformat=icon$$xicon
000005506 8564_ $$s8599$$uhttp://publi2-as.oma.be/record/5506/files/KahramanAliçavuş2022_MNRAS510_1413.jpg?subformat=icon-180$$xicon-180
000005506 905__ $$apublished in
000005506 980__ $$aREFERD