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

Abstract

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 2018-2021. 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 made 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 M-R and HR 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 identified as oEA stars by definition, with the primaries to be pulsating stars of $\delta$ Scuti type, while evidence of mass flow from the evolved secondary components is present in their Na I D spectra.

22 pages, 19 figures, 8 tables, 5 appendices. Accepted for publication in Astronomy & Astrophysics

References in corpus (14)

• The Transiting Exoplanet Survey Satellite
• The K2 Mission: Characterization and Early results
• The Wide Field Spectrograph (WiFeS): Performance and Data Reduction
• {\em Gaia}-derived luminosities of {\em Kepler} A/F stars and the pulsator fraction across the δ Scuti instability strip
• A detection threshold in the amplitude spectra calculated from Kepler data obtained during K2 mission
• The role of turbulent pressure as a coherent pulsational driving mechanism: the case of the delta Scuti star HD 187547
• Period changes in six contact binaries: WZ And, V803 Aql, DF Hya, PY Lyr, FZ Ori, and AH Tau
• Survey for δ Sct components in eclipsing binaries and new correlations between pulsation frequency and fundamental stellar characteristics
• The single-sided pulsator CO~Camelopardalis
• Asteroseismology of Kepler Algol type oscillating eclipsing binaries
• The oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep: Photometric analysis, frequency search and evolutionary status
• A comprehensive study of six Algol type binaries
• Effect of convective outer layers modeling on non-adiabatic seismic observables of delta Scuti stars
• First frequency analysis for three new members of the group of eclipsing binaries with a pulsating component

Cited by in corpus (5)

• Variable stars in the residual light curves of OGLE-IV eclipsing binaries towards the Galactic Bulge
• Modelling of eclipsing binary systems with pulsating components and tertiary companions: BF Vel and RR Lep
• CZ Aqr: an oscillating eclipsing Algol-type system composed of a $\delta$ Sct primary star and a subgiant star in a quadruple system
• Asteroseismology of four eccentric double-lined spectroscopic eclipsing binaries
• IZ Tel and UW Vir: Southern oscillating eclipsing Algol systems with active mass transfer