English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This work presents an extensive analysis of the properties of three southernsemi-detached eclipsing binaries hosting a pulsating component, namely HM Pup,V632 Sco, and TT Vel. Systematic multi-filtered photometric observations wereobtained using telescopes located in Australia and Chile mostly between2018-2021. These observations were combined with data from the TransitingExoplanet Survey Satellite (TESS) mission for a detailed analysis ofpulsations. Spectral types and radial velocities were determined from spectraobtained with the Australian National University's 2.3 m telescope and WideField Spectrograph. The data are modelled and the absolute parameters of allcomponents are derived. The light curve residuals are further analysed usingFourier transformation techniques for the determination of the pulsationfrequencies. Using theoretical models, the most probable modes of the principaloscillations are also identified. Eclipse-timing variation analysis is alsomade for all systems and the most likely mechanisms modulating the orbitalperiod are proposed. The physical properties of these systems are compared withother similar cases and the locations of their components are plotted in theM-R and HR diagrams. Finally, the pulsational properties of the oscillatingcomponents are compared with currently known systems of this type within theorbital-pulsation period and log g-pulsation period diagrams. These systems areidentified as oEA stars by definition, with the primaries to be pulsating starsof $\delta$ Scuti type, while evidence of mass flow from the evolved secondarycomponents is present in their Na I D spectra.

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