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/

Zendy Plus

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

Zendy Tools

Zendy Open

We present spectroscopic observations of the double-lined early typeeclipsing binary V1898\,Cyg. The radial velocities were obtained by means ofthe cross-correlation technique. Analyses of the BV light curves and RVs led todetermination of the fundamental stellar parameters of the V1898\,Cyg'scomponents. We derived new ephemerides for the eclipsing pair using theobserved times of mid-eclipses. The residuals between the observed and computedtimes of mid-eclipses were analysed and a rate of the period change $\dot{P}/P=6.68 \times 10^{-7}\,yr^{-1}$ was obtained. The orbital period is increased byabout 0.38 s in the last 24 years due to the mass transfer from less massivesecondary to the more massive primary star with an amount of$1.88\times10^{-7}\,$ \Msun in a year, assuming conservative case. Results ofthe light and radial velocity curves' analyses were combined and the physicalparameters of the components were revealed. The absolute parameters for thestars are derived as: M$_1$=6.054$\pm$0.037 M$_{\odot}$, M$_2$=1.162$\pm$0.011M$_{\odot}$, R$_1$=3.526$\pm$0.009 R$_{\odot}$, R$_2$=2.640$\pm$0.010R$_{\odot}$, T$_{eff_1}$=18\,000$\pm$600 K, and T$_{eff_2}$=6\,200$\pm$200 K.We have calculated the distance to the system of V1898\,Cyg as 501$\pm$5 pcusing the infrared JHK magnitudes and bolometric corrections for the primarystar. While the more massive star locates in the main-sequence band the lessmassive secondary appears in the giant branch which is common in the classicalAlgols. Any attempt for comparison with current stellar evolution models wasmade because the system seems in the phase of fast mass transfer. Moreover, thecomponents of the system's proper motions present some indications aboutmembership of the North America nebula.

V1898 Cygni: An interacting eclipsing binary in the vicinity of North America nebula