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

We present the absolute properties of the double-lined eclipsing binary KIC6206751 exhibiting multiperiodic pulsations. The ${\it Kepler}$ light curve ofthis system was simultaneously solved with the radial-velocity data given byMatson et al. (2017). The results indicate that the binary star is ashort-period semi-detached system with fundamental parameters of $M_1$ =1.66$\pm$0.04 M$_\odot$, $M_2$ = 0.215$\pm$0.006 M$_\odot$, $R_1$ =1.53$\pm$0.02 R$_\odot$, $R_2$ = 1.33$\pm$0.02 R$_\odot$, $L_1$ = 5.0$\pm$0.6L$_\odot$, and $L_2$ = 0.96$\pm$ 0.09 L$_\odot$. We applied multiple frequencyanalyses to the eclipse-subtracted light residuals and detected the 42frequencies below 2.5 d$^{-1}$. Among these, three independent frequencies of$f_2$, $f_3$, and $f_4$ can be identified as high-order (38 $\le n \le$ 40)low-degree ($\ell$ = 2) gravity-mode oscillations, whereas the otherfrequencies may be orbital harmonics and combination terms. The ratios betweenthe orbital frequency and the pulsation frequencies are $f_{\rm orb}$:$f_{\rm2-4}$ $\simeq$ 2:3, which implies that the $\gamma$ Dor pulsations of thedetached primary star may be excited by the tidal interaction of the secondarycompanion. The short orbital period, and the low mass ratio and $M_2$demonstrate that KIC 6206751 is an R CMa-type star, which is most likelyevolving into an EL CVn star. Of seven well-studied R CMa-type stars, ourprogram target is the only eclipsing binary with a $\gamma$ Dor pulsatingcomponent.

KIC 6206751: the first R CMa-type eclipsing binary with $\gamma$ Doradus pulsations