First frequency analysis for three new members of the group of eclipsing binaries with a pulsating component

Liakos, A.; Cagaš, P.

doi:10.1007/s10509-014-2042-4

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…The present paper is a continuation of the systematic study on EBs with a δ Scuti component (see also Liakos & Niarchos 2009Liakos & Cagaš 2014;Liakos 2017Liakos , 2018 and aims to enrich the current sample of this kind of systems. For KIC 10686876 only preliminary results have been published regarding its dominant pulsational frequencies (Liakos & Niarchos 2017).…”

Section: Introductionmentioning

confidence: 99%

Asteroseismology of twoKeplerdetached eclipsing binaries

Liakos

2020

A&A

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The present work contains light curve, spectroscopic, and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of δ Scuti type and have been observed with the unprecedented accuracy of the Kepler space telescope. Using ground-based spectroscopic observations, the spectral types of the primary components of the systems were estimated as A6V and A5V for KIC 04851217 and KIC 10686876, respectively, with an uncertainty of one subclass. The present spectral classification, together with literature radial velocity curves, were used to model the light curves of the systems and, therefore, to calculate the absolute parameters of their components with a higher degree of certainty. The photometric data were analysed using standard eclipsing binary modeling techniques, while their residuals were further analysed using Fourier transformation techniques to extract the pulsation frequencies of their host δ Scuti stars. The oscillation modes of the independent frequencies were identified using theoretical models of δ Scuti stars. The distances of the systems were calculated using the relation between the luminosity and the pulsation period for δ Scuti stars. Here, the physical and the oscillation properties of the pulsating components of these systems are discussed and compared with others of the same type. Moreover, using all the currently known cases of δ Scuti stars in detached binaries, updated correlations between orbital and dominant pulsation periods and between log g and pulsation periods are derived. It can concluded that the proximity of the companion plays significant role in the evolution of the pulsational frequencies.

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Section: Introductionmentioning

confidence: 99%

Asteroseismology of twoKeplerdetached eclipsing binaries

Liakos

2020

A&A

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“…This work is a continuation of the detailed study on individual oEA stars with a δ Scuti component (see also Liakos et al 2012;Liakos & Niarchos 2013;Soydugan et al 2013;Liakos & Cagaš 2014;Liakos 2017Liakos , 2018Ulaş et al 2020) and the first paper of a series dedicated to southern systems. We report analyses of three EBs that were apparently single-lined: HM Puppis, V632 Scorpii, and TT Velorum.…”

Section: Introductionmentioning

confidence: 86%

Comprehensive analysis of southern eclipsing systems with pulsating components: The cases of HM Pup, V632 Sco, and TT Vel

Liakos

Moriarty

Blackford³

et al. 2022

A&A

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This work presents an extensive analysis of the properties of three southern semi-detached eclipsing binaries hosting a pulsating component, namely HM Pup, V632 Sco, and TT Vel. Systematic multi-filtered photometric observations were obtained using telescopes located in Australia and Chile mostly between 2018 and 2021. These observations were combined with data from the Transiting Exoplanet Survey Satellite (TESS) mission for a detailed analysis of pulsations. Spectral types and radial velocities were determined from spectra obtained with the Australian National University’s 2.3 m telescope and Wide Field Spectrograph. The data are modelled and the absolute parameters of all components are derived. The light curve residuals are further analysed using Fourier transformation techniques for the determination of the pulsation frequencies. Using theoretical models, the most probable modes of the principal oscillations are also identified. Eclipse-timing variation analysis is also carried out for all systems and the most likely mechanisms modulating the orbital period are proposed. The physical properties of these systems are compared with other similar cases and the locations of their components are plotted in the Mass-Radius (M−R) and Hertzsprung-Russell diagrams. Finally, the pulsational properties of the oscillating components are compared with currently known systems of this type within the orbital-pulsation period and log g-pulsation period diagrams. These systems are confirmed as oscillating eclipsing Algol-type systems (oEA stars), as the primary components are pulsating stars of δ Scuti type, with evidence of mass flow from the evolved secondary components present in their Na I D spectra.

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“…The present paper is a continuation of the systematic study on EBs with a δ Scuti component (see also Liakos & Niarchos 2009, 2013Liakos & Cagaš 2014;Liakos & Niarchos 2016;Liakos 2017Liakos , 2018 and aims to enrich the current sample of this kind of systems. Preliminary results have been published for KIC 10686876 (Liakos & Niarchos 2017), regarding its dominant pulsational frequencies, and together with KIC 04851217 were selected for detailed analyses for first time.…”

Section: Introductionmentioning

confidence: 99%

Asteroseismology of two Kepler detached eclipsing binaries

Liakos

2020

Preprint

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The present work contains light curve, spectroscopic and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of δ Scuti type and have been observed with the unprecedented accuracy of the Kepler space telescope. Using ground based spectroscopic observations, the spectral types of the primary components of the systems were estimated as A6V and A5V for KIC 04851217 and KIC 10686876, respectively, with an uncertainty of one subclass. The present spectral classification together with literature radial velocities curves were used to model the light curves of the systems and, therefore, to calculate the absolute parameters of their components with higher certainty. The photometric data were analysed using standard eclipsing binary modeling techniques, while their residuals were further analysed using Fourier transformation techniques in order to extract the pulsation frequencies of their host δ Scuti stars. The oscillation modes of the independent frequencies were identified using theoretical models of δ Scuti stars. The distances of the systems were calculated using the relation between the luminosity and the pulsation period for δ Scuti stars. The physical and the oscillation properties of the pulsating components of these systems are discussed and compared with others of the same type. Moreover, using all the currently known cases of δ Scuti stars in detached binaries, updated correlations between orbital and dominant pulsation periods and between log g and pulsation periods were derived. It was found that the proximity of the companion plays significant role to the evolution of the pulsational frequencies.

show abstract

First frequency analysis for three new members of the group of eclipsing binaries with a pulsating component

Cited by 9 publications

References 25 publications

Asteroseismology of twoKeplerdetached eclipsing binaries

Asteroseismology of twoKeplerdetached eclipsing binaries

Comprehensive analysis of southern eclipsing systems with pulsating components: The cases of HM Pup, V632 Sco, and TT Vel

Asteroseismology of two Kepler detached eclipsing binaries

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